Extended application of test results for fire resistance and/or smoke control for door

BS EN 15269-11:2018

Extended application of test results for fire
resistance and/or smoke control for door,
shutter and openable window assemblies,
including their elements of building hardware

Part 11: Fire resistance for operable fabric curtains

bsi.

BS EN 15269-11:2018

BRITISH STANDARD

National foreword

‘This British Standard isthe UK implementation of EN 15269-11:2018.

its preparation was entrusted to Technical
ie resistance tess for doors.

list of organizations represented on this committee can be obtained on

Foguest 1 ts seeretary

‘This publication does not purport to include ll the necessary provisions
fa contract Users are responsible for its correct application,

(© The British Standards institution 2018
Published by BSI Standards Limited 2018

ISBN 978 0 580 95509 9

165 91.060.50; 13,220.50

sh Standard cannot confer immunity from

‘This British Standard was published under the authority ofthe
Standards Policy and Strategy Committe on 31 May 2018.

‘Amendments/corrigenda issued since publication
Date ‘Textatfocted

BS EN 15269-12018
EUROPEAN STANDARD EN 15269-11

NORME EUROPÉENNE

EUROPÂISCHE NORM April zoo

1651322050; 91.0050

English Version

Extended application of test results for fire resistance
and/or smoke control for door, shutter and openable
window assemblies, including their elements of building
hardware - Part 11: Fire resistance for operable fabric

curtains
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BS EN 15269-11:2018

Contents Page
European foreword —— = = … 4
Introduction 5
1 Scope. - - = - - 6

2 Normative reference nm == === u

3 Term definitions and abbreviations.

34 Temeand defini

32 Abbreviations ured for Annex Band aa

4 Determination ofthe fel of extended application,
41 General

10

10

42 Procedure for maximum fdo extended applica

43. Procedure fr maximum feld of extended application

44 Interpretation oftest res

de Alten msrarareaea. __ ___——————>——————————————————_=

5 Extended application report.

u

2

6 Classica

Annex A (normative) Construction parameter variations for Fabric Curtain assembles.

Annex (oomativ) Calculations for curtain assemblies carrying mainly horizontal lads (closed
A ee

BA Seopeofealcultion

2

5

s

Caution prineipes.

ss

Caution method increasing curtain width and height.

us

BA Tesspocimen.
BS Shrinkage ofcurtain material
56

Maximum fabri stress up sale curtain

17 Maximum fabric stress in up scaled curtain

so

8 Maximum Load bearing capacity A 7, AM) mn

39 Caleulationofimiting stress.

a

BS EN 15269-11:2018
EN 15269-11:2018 (E)

110 Barrel alee 69
811 Barrel support beac calla 0
Baz Astecalcultions 66
BAS EndplateCalculaions. 66
1.14 Bottom bar expansion allowance. 0
13.15 Maximum length ofthe bottom bar resp. bottom bar sections se Figure A49/A.50… ©
1816 Allowance for thermal expansion m
Annex (normatve) Calculations for curtain assembles carrying mainly vertical loads (overlapping
‘modula curtains, curtains without retaining assemblies) rom 71
CA Scope ofcateuation = a n
2 Calelation principles. n
©3 Calculator method increasing cutain width and height m
CA Test Specimen for modular systems. n
CS Shrinkage ofeurtain. = = n
(| Maximum fabric stress in up scaled curtain in vertical direct 74
CT Maximum fabric stress in up scaled curtain in horizontal irelion 77
5 Maximum Load bearing capacity (Figure A.) 70
9 Upsealingoverlapsand end ct "0
C10 Example forinereasingoverlapping systems. m
€a1 Calculation oflimitin stress. e e
12 Barrelcalelations a
CAS Barrel support bracket calculations. 2
A es:
CAS Endplate Calculations. - 2s
616 Bottom bar expansion allowance #7
(©17 | Maximum length of the bottom bar resp. bottom bar sections se Figure A49/A.5. æ
618 Allowances for thermal expansion. 28
Bibliography. 29

BS EN 15269-11:2018

European foreword

‘This document (EN 15269-11:2018) has been prepared by Technical Committee CEN/TC 127 Fire
safety in building’, the secretariat of whichis held by BSL

‘This European Standard shall be given the status of a national standard, ether by publication of an
identical text or by endorsement, at he Latest by October 2018, and conficting national standards shall
‘be withdrawn atthe latest by October 2018.

Attention is drawn tothe possibility that some ofthe elements of this document may be the subject of
patent rights. EN shall not be held responsible for identifying any o all such patent rights.

“This document has been prepared under a mandate given to CEN and CENELEC by the European
‘Commission and the European Free Trade Assocation

EN 15269, Extended application of test results for fre resistance and/or smoke control for door, shutter
and openable window assemblies, including their items of building hardware, consists ofthe following
parts:

— Part 1: Genera requirements;

— part 2:Pire resistance of hinged and pivoted tel door assembly:

— part 3: Fire resistance of hinged and pivoted timber door assembles and openable timber framed
windows;

— Ports: Fire resistance of hinged and pivoted, metal framed, glazed doorsets and openable windows 1);
— Pare 6: Fire resistance of sidi tímbe door assemblies 1;

— Part 7: Fire resistance of siding tee door assemblies:

— Part 10: Fire resistance of tel rolling shutter assemblies;

— Part 11: Pie resistance of operable fabric curtains

— Part 20:Smoke control for hinged and pivoted steel, timber and metl framed glazed doorsets.

‘Acconling to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugodav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
“Turkey and the United Kingdom.

BS EN 15269-11:2018
EN 15269-11:2018 (E)

Introduction

“This European Standardis one ofa series of standards intended to be used for the purpose of producing
an extended application report based on the evaluation of one or more fire resistance and/or smoke
contra tests These standards may alo be used to Identify the best selection of test specimens required.
to covera wide range of product variations.

Before there can be any consideration for extended application the doorset should have been tested in
accordance with EN 16341 to achieve a test result which could generate a classification in accordance
‘with EN 13501: atleast equal tothe classification subsequently required from extended application
considerations,

A review of the door assembly construction parameters can indicate that one or more characteristics
nay be Improved by a particular parameter variation. All evaluations should be made on Ihe basi of
retaining the fre resistance classifications obtainable from testing to Including those lower
than the test duration. However, this should never lead to an increased classification for any specifi fre
resistance and/or smoke control performance parameter beyond that achieved during any one test
‘unless specifically identified in the relevant Construction Parameter Variation tables within this series
ofstandirds,

‘The effect on the maintaining ofthe self closing function (Classification) of the door assembles
following an extended application process is not addressed inthis series of standards.

BS EN 15269-11:2018

1 Scope

‘This document covers vertically mounted types of manual or powered, operable fabric curtain
assemblies with downward closing operation. Curtain ystems are deren from (are separated from)
oor systems due to their not rigid closure element typically made of thin walled materials as for
instance woven or knitted fabrics and fll. These closure elements are not able to carry significant
loads normal to their surface by ther bending stfnes. In other words: curtain systems are separated
from door systems because they can only conduct pulling forces by tensile stress in plane to their
surface, Pushing forces are not conducted in plane to thelr surface

‘Tis document states the methodology fr etendng the appli of test ests obtained om
tea) nantes in accordance with he BRLGDE tet ethod re.

‘Subject tothe completion of the appropriate test or test selected from those Klentiied in Clause 4, the
‘extended! application may cover all or some of the following non-exhaustive st of examples:

— tminelated (E) radiation (EW) oF insulated (EI or 12 classifications;
— coling mechanisms:

— wal/ceing fed elements

— items of bing hardware;

— decorative fishes;

— intumescent draught or acoustic seas

— alternative supporting construction)

2. Normative references

“Te following documents are referred to in te txt in such a way that some or al of their content

constitutes requirements ofthis document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) apis.

136341 Fire resistance tests — Part 1: General Requirements

ENIGSEIL Fire resistance and smoke control tests for door and shutter assemblies, openable windows and
elements of bllding hardware — Part 1: ire resistance test for door and shutter asemblles and openable
‘windows

EN13501:2 Pire classification of construction products and building elements — Part 2: Classification
using dat fom fre resistance tests, excluding ventilation services

NI5209 7 Extended application of test result for fie resistance and/or smoke control for door, shutter
and openable window assembles, including their elements of building hardware — Part 1: General
requirements

ENIS931-2 Furocode 3: Design of steel structures — Part 1-2: General rules — Structural fire design

BS EN 15269-11:2018
EN 15269-11:2018 (E)

3. Terms, definitions and abbreviations
34 Terms and definitions

For the purposes ofthis document, the following terms and definitions apply.
150 and IEC maintain terminological databases for use in standardization atthe following adresses
— IEC Hletropedia: available at hity://avswolectropedinors/

— 150 Online browsing platform: available at hity://yvntisoors/oby

344

fall sale test

test in accordance with EN 1634-1]

342

small scale test

testof parts ofthe fabric curtain

313

parts

for definition of parts see Figure A1

314

safety edge

‘lectroni device to prevent damage or injuries caused by colision with the bottom bar

Note tony: Typically Axe onto the bottom bar (Figure Ad part),

32 Abbreviations used for Annex B and € calculations

Ue maximum deflection during ire test foam
Ge maximum gap between the bottom bar and the Noor level Im)
Me cearheight oftest specimen foam
Wz sealed distance between sde guides tom
Us scaled distance neutral line to max. deflection (horizontal [mm]
rection)
F5 Radlusofacaleddefection Im}
Ps Pressure (20 Nm?) 10/02)
Can horizontal bow length of wp scaled curtain frum
Cay vertical bowlength of up scaled curtain from
€ Tiknessofeurtain material frum
sh spaceinside guides (horizontal lack) foam)
5, horizontal shrinkage (36)
8

vertical shrinkage (4)

BS EN 15269-11:2018

m

2
we

4
sa
o
we
te
"e

Wea
lo
[3
Wer
‘sp

horizontal paling force per meter height
vertical fabri length considering vertical shrinkage

up scaled drop length of intended system

addtional abri length of up scaled curtain in vertical direction
total weight of scaled curtain material and bottom bar

total weight of up scaled curtain material

total weight of upscaed bottom bar

‘maximum stress in up sealed curtain

‘maxima stress in vertical direction in up scale curtain
streasin scaled curalnin horizontal direcion
acceleration of gravity (9381 m/s2)

load during smal scale fire test

‘mass of heft fr small scale fire test

width of curtain material carrying load during small scale ire
test

‘moment of inertia for the barrel
section modus for the barrel

curtain weight

Barrel outside diameter

curtain wich

ght of fire curtain aperture

Weight per unit area of curtain

Weight of barrel including spring, axles, tubular motor, et.
‘Barrel wallthicknese

Full weight of curtain including bottom rail

Barre stress

‘Barrel assembly weight

‘Barrel length for fixed barre! bearing on both ends, distance
‘between intermediate barel supports for floating barrel bean

Young Modulus

bracket potential support
Support bracket moment of inertia,

(N/m?
(N/mm?)
[mn]
05)
m

Do

fan]

fan
5]

Do
tal

im

Im
Dam?)
Dal
(oom)
Os}
(N/mm?
m

fm]

an?
m

{oom}

ose

Mira
En]

We
Total

Wea
Za
Pa
on
wa
Mar
la
ona
Wee
hg
Ara
Patel

Support bracket maximum stress

Distance between centeline of axle and ear of barrel support
bracket

Distance between barrel support centre of gravity and the point
of greatest stress

bracket component
Barre support length

Support bracket cross-sectional area
casing hood component

Casing thickness

Casing length

Casing sotttength
Wri-wr2-Wr3

Axe diameter

Axle bending stress
50 % of barre assembly weight

Motor weight

sde

Ade shear stress

Weightof fixing angle

Endplate eight

Fixing angle cross-sectional area

density ofstel « 7850

‘Endplate horizontal cross-sectional area
Endplate width

indplate thickness

Area correction factor (dimensionless)
Length correction factor (dimensionless)
Fixing angle lg length attached to endplate)
Endplat bending stress

BS EN 15269-11:2018
BN 15269-11:

m
frum}
fmm
[N/mm2}
m

ta
frum
m2
m
fom
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[mm]

BS EN 15269-11:2018

We 50% ofbarreassembiy weight m
Le Adeendbearnglength im]

Way Landonendplate m

La Blfective motorshaf length ton]

7 tg (imensioness)
West Endplateselfaveight weight m

We Eccentricioading m

War Weight on endplate from motor Ba

Wr Totalendplatefoad m

Turm Shearstressin all endplate fixing bolts N/mm?)

np Numberofboïs

ap Totalareaofbolts
Fora Tensileforceintop endplate ing bolt

4 Determination of the field of extended application

44 General

Before there can be any consideration for extended application the operable fabric curtain shall have
teen tested and classified In accordance wih EVIG and respectively in order to
establish classification forthe operable fabric curtain

‘Areviw of the construction parameters can indicate that one or more characteristics may be improved
by a particular parameter Variation. all evaluations shall be made on the basis of retaining the
classifications obtainable from testing to EN 1634-1, including those lower than the test duration,
However, this shall never lead to an increased classification for any speciic parameter beyond that
achieved during any one test unless specifically identified in the relevant Construction Parameter
Variation tables

Al evaluations shall be made on the basis of retaining the classification obtained from testing to
1, by following the ensuing procedure, any part ofthe classification cannot be achieved by extended
application rules that part of classification shall be omitted from the subsequent extended application
sport and classification report.

42 Procedure for maximum field of extended application

‘entity the variations from the original test specimen(s which are required to be covered by an
‘extended application report see Figure A fora typical operable curtain,

Locate the variations inthe appropriate parameter variation by reference to columns (1) and (2) of
Table Ae

Review the type of classification to be retained from column (3) of Table 11 and establish from the

contents of column (4 of Table AA whether any extended application is avallabl without the need for
further testing.

0

BS EN 15269-11:2018
EN 15269-11:2018 (E)

‘Where his is deemed to be possible this can be recorded in the extended application report together
‘wth any appropriate restrictions and the stated rules from column (4 in Table A

‘Where the variations required can only be achieved from additional testing according to column (5) in
‘Table AL, the additional test can be made on a similar specimen type o the orginal test against which
the extended application Is sought. Alternatively, column (5) in Table A1 identifies an option for
alternative testing and relevant test parameters

43 Procedure for maximum field of extended application

Ii possible to provide a mite field of extended application from the results ofa single test. However,
‘where a manufacturer intends to produce a range of operable abri curtains, itis recommended that
(arefl consideration is given tothe complete range of designs and options in order to minimize the
testing required before testing commences.

Establish al the parameter variations which are required to be part ofthe product range.

Select specimen(s) for the fist tes() in the series to ensure that the most important parameter
‘variations forthe manufactured products are covered.

‚Complete the first test or a series of tests and prepare a Nel of direct application and possibly a
‘lassfication report from the results ofthe test().

Establish which of the original desired parameter variations have not been covered by the direct
application and classification report.

Identify these parameter variations in Annex A and establish if any extended application is posible
without further testing.

Record this forthe extended application report together with any restrictions and rules given in column
()in Table A1.

Evaltate which, if any ofthe desired parameter variations have not been covered by the fe of direct
applicationor the inital fel of extended application derived from 43.7 above.

Select the required outstanding parameter variations from column (1) and column (2) of Table A1 and
observe from column (5) of Table Ad which are the most appropriate weakest specimen options for
further testing.

I the complete selection of required parameter variations has not been covered by the tests completed
in accordance with 4.39 above, then an appropriate test or tests may be repeated with the additonal
‘product variations incorporated.

44 Interpretation of test results

In order to maximize the Neld of extended application, ts important thatthe test reports shall record
details ofany integrity and/or insulation failure throughout the tet duration.

Where a series of tests have been conducted, the field of extended application shal be based on the
lowest performance achieved from the complete series of tests unless premature failure has been,
tributed to one or more specific construction parameter variation

‘Where it has been possible, o identify specific parameter failures, he extended application forall other
construction parameter Variations can be based on the performance achieved alter isolating the
‘premature allur(s),

45 Additional measurements

‘To use extended application the following measurements are to be taken:
— Figure A3:

winking allowance;

"

BS EN 15269-11:2018

— Figure A545 = Bottom bar deletion,
— Figure ASS Uy = Maximum curtain deflection.
5 Extended application report

a ende spp report nacre wth the voqurements ol. Chane of:
En 1526312010 boedonthe resus evaluations in accordance with te above.

6 Classification report

“The clasifiation report shall be determined from the result ofthe extended application report and
resented in accordance with

2

BS EN 15269-11:2018
EN 15269-11:2018 (E)

Annex A
(normative)

Construction parameter variations for Fabric Curtain assemblies

"able AL i designed to provide criteria for the creation of extended application reports by experts in.
the field offre resistance testing of operable fabric curtain assembles.

‘Table AA shall only be used to evaluate a fed of extended application when atleast one positive fre
resistance testo ha resulted in classification according to

‘The first two columns identify posible variations to the construction details ofthe specimen tested.

‘The typeof classification achieved from the test can be identified from the Performance characteristic!
sectonof Table A column 3s insulation radiation control or integrity only.

‘The effect of the change in each parameter is evaluated for each characteristic in column 3 under E for
effects on integrity for effets on insulation (whether an 11 or 12) and W for he effects on radiation
control oF EW curtains.

‘Where symbols are used these relate to the following definitions:
A) <: forecast is a worse performance;

BI >= forecast is a better performance;

forecasts no significant ference:
4) S- forecast is a worse oF equal performance;
e) >> forecast is better or eq
o>
‘These evaluations lea t the judgement ofthe posiilly of the extension o the feld of application the
results of which are given in column 4, In certain cases, in Column 4, i sa requirement to achieve
Category B, the detal for which are given in 1332, Table 1.

Were ational tests are deemed to be necessary the type of specimen approved fo incorporation of
the changed parameter i defined in column 5. Add additional text clearing up on which parameters
these results are relevant

‘Where itis possible to use Information from tests performed on one configuration for evidence on a
Afferent configuration, this allowance has been made in order to reduce the overall number of tests
required or extended application evaluation.

‘The rules given for size increase (width, height, area) of the curtain assembly are applicable for
‘operable curtains tested in size equal or bigger than the maximum sie which can be tested In a
Standard size furnace (normally 3m x 31m). All ize variations hasad on the results of more than one
test with specimens of different sizes can be combined.

Where construction parameter variations result in an increase in the weight of the curtain, the
requirements given in Annex B shall e satisfied.

performance;

<-forecastunknoum.

»

“

BS EN 15269-11:2018

I after consideration of a specific variation, addtional changes are required to be made to the
specimen; these may be made providing the implications on other variations are also taken into

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BS EN 15269-11:2018

BS EN 15269-11:2018

Figures referred to in Annex A

Key
m ie be eeap m suppor ing,
me ET Ds abraten Om ‘pening with
5 retanelements EI endplte on ‘opening height
m botombar E2 endplat ing W ie ge wath
a seguidos 5 shaft bearing Iterloverlap
a fnggudes E4 haora tube H ne casing
suppor fing ght
pr be AL tubecasing h vertical ovetap
ve tubesupport G2 motor
ba at m easing support

Figure A1 — Typical operable curtain,

a

BS EN 15269-11:2018
EN 15269-12018 (E)

Ly

N
OR

\
|
AT AP aE A A

A inside the structure « Suspended from the cling
Key
height of easing ho vertat overlap

Figure A.2 — Distance of lintel to casing and installation options casing

‘Table 2 — Alternative installation options casing from tested

To
a e e > E
From [A = No [No [Yes [mo
® Ye |- ves [ves [m
€ ves [mo |- ves [no
» No [mo [mo |[- No
E ves [mo [mo [ves |-

BS EN 15269-11:2018
EN 15269-11:2018 (E)

Bf
=

N,

à Dimensions side guides. ‘Expansion allowance
Key

D de wow cow

4 trop 5 shrinléngallonance E expansion allowance

Figure A — Expansion allowances bottom bar and installation options side guides

‘Table A3 — Alternative installation options side guides from tested

To
a > B
From [a No Yes
Yes Yes
5 No No

3

BS EN 15269-11:2018
EN 15269-12018 (E)

©

um 7)

2Vertealtopt doom cg ge ab sing on ange

Figure AA — Closing options

‘Table A4 — Alternative closing options from tested

To
a > © a
From [a No Yer No
b Yes Yes No
e Yes No No
a Yes No Yes

BS EN 15269-11:2018

Key

1 Laer
2 Layer
3 Layere
4 Layer
5 Layere

6 Joint

4 tes of insulto atera
distance joint to int

Figure A.5— Multi-layer fabric

”

BS EN 15269-11:2018
EN 15269-12018 (E)

vers

BS EN 15269.11:2018
EN 15269-11:2018 (E)

singlescam
double sam .
bre t
sam ar
Figure A.6— Textile joints and stitching
‘Table A.6— Seam variations from tested
To
a ® E D E F
From [a ves fre frs fn [No
8 No No [vs [no [mo
€ ves [ves Yes [no |
D No [ves [ves No [mo
E ves [ves [ve [ve Yes
F mo [mo [ves fre [mo

=

BS EN 15269-11:2018
EN 15269-12018 (E)

AA
>
ue
Key
1 retaining stern 3 thermal ant mineral rock Abre
2 eam D presse atop of specimen

Figure A.7 — Small scale test for the vertical seam direction and leads on retaining system

BS EN 15269-11:2018

AA
S S
ue
tube heute 3 temltinketmiersrecktüre
Fi D maman

Figure AB — Small scale test for he horizontal seam direction and loads on barrel barrel to
tube fixing

a

BS EN 15269-11:2018
EN 15269-11:2018 (E)

Key
Ad, d2 Afferent distances curtain curtain

Figure A.9 — Multi curtain system (supplied as one uni)

CFO

Figure AAO outside diameter decrease
0:0)
OO)

Figure A — Outside diameter increase

Figure A.12 — Wall thickness decrease

OH

¡050
Figure A13— Wall thickness increase

OD

Figure A.14— Barrel shape change

e

BS EN 15269-11:2018
EN15269-112010 (E)

Fixed bearing.

Floating bearing.

Figure A16 — shaft outside diameter decrease

0-O

Figure A.17 — Shaft outside diameter increase

Figure A.19 — Shaft hollow to solid

Figure A220 —Shalt shape change

BS EN 15269-11:2018
EN 15269-11:2018 (E)

a=
Figure A21 — barrel sub shaft to continuous axle

Faxing by ey

ing by iveted steel

plate

Fig by ge, rivets and

additonal fabri tum
(breaking-device
necessary)

“

Figure A23— curtain to tube fix

ss

BS EN 15269-11:2018

EN 15269-12018 (E)
"able 23 — Variations from tested.
To
a v © a e
From [a No No No Yes
» No No No Yes
© no Ye No Yes
a no No No Yes
® No No No No

Figure A24 — Support brackets endplates decrease

|
Figure .25 — Support brackets/endplates Increase

203 09

[cal
Figure A26 —Shalt cup size decrease

wa

Figure 27 — Shaft cup size increase

à Fabric running over edge

BS EN 15269-11:2018
EN 15269-11:2018 (E)

SS

——
9

A Without casing. [7
2

Figure 429 — Integrity ofthe system

|

Ty Gap Den cas and fabric 7
| a
2a

2 gxprelevant forintepity

‘Table A.29 — Variations from tested
To
a > © a
From [a No [mo [mo
> no mo [mo
© Yes |ve No
a ves [ve [No

a

BS EN 15269-11:2018

Figure A30— Casing/hood add

Figure A21 — Casing/hood delete

lH

Figure A32 — Casing/hood size decrease

Figure A33 — Casing/hood size increase

Figure A34—

Figure A35 — External drive system delete

Figure A.36 — Internal drive system add

Figure A37 — Internal drive system delete

BS EN 15269-11:2018
EN 15269-11:2018 (E)

Figure A.38 — Barrel/casing supports add

o

Figure A.39 — Barrel/casing supports delete

Bs

e

Figure A40 — Barrel/casing support shape orientation change

i

Figure 1:41 — Barrel/casing support

location inside to outside

Figure A42 — Barrel/casing support - location outside to inside
eZ

Figure 143 — Standard flexible supporting construction to rigid

qe

Figure A44— Rigid supporting construction to standard lexible

Figure A45 — Modified (strengthened)

exible supporting to rigid

sw

BS EN 15269-11:2018
EN 15269-12018 (E)

Key
1 measuring point (ahi sing yar)
2 height of Pressure

3 fume

4 fee

$ thermal blanket mineral el ne

Figure AA6 — Shrinkage of curtain test

Example to scale
Key

1 exposed side
2 unexposed side

Figure A47 — Deformation of bottom bar under thermal gradient

BS EN 15269-11:2018
EN 15269-11:2018 (E)

Moros

Figure A.48 — Sealed bottom bar deflection

“

Sd tjs LL

Sealed curtain

Figure A49-— Maximum stress in the tested curtain

s

BS EN 15269-11:2018
EN 15269-12018 (E)

Figure A.50— Tested configuration fortest overlapping systems.
| possible
— q non-possible

Figure A.51 — Positions of rollers

Rollers and fabric overlaps
test Test
2) Single roller fabric ') Rollersone Overlap
Test
me exposed
side
9 Rollers two overlaps unexposed
side
Figure A52 — Rollers and fabric overlaps
‘Table A.52 — Variations from tested
To
a > e
From [a CT
» No No
€ No [ves

See
BN 15260402018

Annex B
(normative)

Calculations for curtain assemblies carrying mainly horizontal loads
(closed curtains)

B.1 Scope of calculation

‘curtain systems are different from typical door systems due to their not rg losure element typically
made of thin walled materials as for Instance woven oF ktted fabries and fol, These closure
lements are not able to carry significant loads normal to thelr surface (eg caused by pressure load)
‘due to their characteristic lack of bending sine That's why itis assumed that curtain systems can.
only conduct tensile forces by tensile stress in-plane to their surface. ts assumed that compressive
forces ae not conducted in-plane other surface
‘ts assumed that the stresses in the fabric curtain can be approximated by a model ofa thin-walled
sphere under inner pressure where the stresses follow the vessel formula
‘To be able to calculate scaling possibilities of textile assemblies in a consistent and handy way, the
assemblies are reduced toa simplified model as EXAP calculation basis. For curtain assemblies having
An interconnected "one piece” closure element itis assumed thatthe load on he exile curtain being
‘caused by pressure are mainly caried in horizontal direction tothe side guides.

B2 Calculation principles

‘The general methodology for checking the proposed specications is based on accepted engineering
first principles which may be modified only in accordance with adjustments given in following
cases

‘The values for material properties such as Young's Moduls shal be an from for
temperatures measured forthe load bearing components at the required cassation time. Y
temperatures of components have not been measured then the furnace temperature according to
EN 1363-1 atthe required classification time shal be used unless otherwise tated.

B.3 Calculation method increasing curtain width and height

Up scaled systems have to be constructed so that as a minimum requirement the integrity of the
«urtainis guaranteed n case offre, Due to the fat that incase of fre the curtains not only exposed to
very high temperature but also to variable and high pressure, the deflection behaviour of the
pressurized curtain neds special attention inorder to predict the behaviour of a up scaled system,

‘The main components ofa Are curtain are its casing, barrel, curtain, bottom bar and side guides, The
fabric ls held at its edges nto a more or less stable postion by atleast some of these components
Because the textile curtain on its own isa deflectable membrane clamped between its edges, forms
when pressurized shape mainly defined by the degree of freedom os edges.

As a result from this modeling method up scaled closed ystems with side guides and retaining system
have to be able to carry higher loads, especially in horizontal direction, to withstand the higher.
pressure load. Therefore they need especially sulficent horizontal tensile strength ofthe fabric and
Sufficient form stability ofthe side guide construction to balance the horizontal pulling force caused by
the pressurized curtain,

‘The overcapacity in the curtain components needed for up scaling in the horizontal and vertical
direction are determined in small scale fre tests as defined in Figures 4.7 and AB,

Shrinking of curtain material during a fre test may change the theoretical bow length and radius of the
curtain shape resulting in fallue ofan up scaled system due to increased tensile tension inside the

=

ELLE

fabric and the retaining system or iting ofthe bottom bar. Therefore the shrinkage of the cu
also tobe determined.

— ma first step the shrinking ofthe curtain materials calculated based on measurements during
{ull scale retest according to BA

— Ima second step the hortzontal bow shape of the intended
‘upon the horizontal textile slack from which fellows the horizontal paling force and the stress in
horizontal direction according to BS.

— ma third step the vertical bow shape ofthe approved up scaled curtain i calculated from which
follows the necessary vertical exile sack and the stress in vertical direction according o 27.

— In the fourth step the calculated stresses are compared to the maximum stress which was
‘measured in the additional small cal tests for horizontal and vertical direction according to BB.

— Inthe Bi step the static requirements of the complete mechanical structure of the scale system
As approved bythe calculation formulas according to 8.9 10 B.16.

B4 Test specimen

‘The test specimen used forthe ul scale fire test according to ENIGH] has to be built according to
the appropriate system design,

BS Shrinkage of curtain material

Shrinkage of curtain material may affects the shape ofa pressurized curtain

‘This may lead to fallue ofan upscale system due to increased tensile tension Inside the abri and
the retention system or ing ofthe bottom bar. Therefore the shrinkage of curtain material has to be
(determine in horizontal and vertical direction.

Determining the shrinkage of curtain materials done by measurement of maximun deflection ofthe
closure element surface and the gap between the bottom bar and the floor during fll sale ire test.

At the beginning ofthe ful scale ie test the curtain assembly has tobe pressurized to constant 20 Pa
allover the surface ofthe system by the ventilation system ofthe furnace. At that state the maximum
‘eflection Ugg ofthe closure element surface and the maximum gap between bottom bar and Moor.
level G shall be recorded, The position of maximum deflection and maximum gap is typically near to
the middle ofthe system.

During fire test the maximum deflection U and maximum gap between the bottom bar and the Moor.
level G should be recorded every 5 min until Up comes toa minimum Ut in and Gt 0 a maximum
Gtamax This isthe most critical moment during Are test concerning material shrinkage.

If no shrinkage but material stretching occurs during ie test Vin may be larger th
Geax may be smaller than Gro.

Assuming a spherical curved curtain shape during fire test the horizontal and vertical curtain
Shrinkage could be calculated according tothe following formulas.

shrinkage in horizontal direction

‘horizontal bow length ofthe curtain atthe start of
thefiretest

minimum horizontal bow length of the curtaln
ring the fre test

We “lear width oftest specimen

Ugo and

See
BN 18260-12018

Yo ‘maximum deflection recorded at the start of the
firetest

ve minimum of maximum deflection recorded during
fire test
‘shrinkage in vertical direction
‘vertical bow length of the curtain at the start of
Me ire test
minimum vertical bow length of the curtain
ring the fr test

Mr “lear height oftest specimen

wo ‘maximum deflection recorded atthe start of the
fire test.

Usain ‘minimum of maximal deflection recorded during
fire test

Go gap between bottom bar and Noor at the start of
the fire test

imax ‘maximum gap between bottom bar and floor

during the fre test

(itis possible that a certain amount ofthe recorded gap between bottom har and floor level caused
by thermal deformation of the bottom bar Itself and not by curtain material shrinkage. But while
Increasing this gap “without shrinkage” has an “opposite influence” to the calculated bow length ofthe

fabric this ari compensated by the formula)

SBT

austen raat ea

‘mar with test pacien

maximum datei record at he sa ofthe fr test

Croma 300 minime hot Rew ng fh can ding he fe

Cro" Citi
Cito aie skagen antl deci

Calcio fil aninkage
by eg érences in veta tow eg of abe according te erences of maxmum
détecter ard erences of gap btwoen bat bar and or

H4 2300 eearheighaflstspecmen
tat ofthe tet

mu of xia defection recorded ving fe tat

1999 between Betton Dar and Mor athe ota the re ast

maximum gp been baton br and Bor ding hee test

minimum serial bo lng ofthe curtin ding he fre
Le

421995 shonkage in vorical dection

See
BN 15260402018

Figure BA — Example

B.6 Maximum fabric tress in up scaled curtain in horizontal direction

‘The maximum fabric stress in horizontal direction can be calculated using the vessehformula
assuming aspherical curved shape ofthe curtain between the side guides.

‘The pressure load fr calculation is set to constant 20 N/m? (20 Pa allover the surface of the system.
‘The Wis the achieved width of the up scale system. The U has tobe calculated

where
Tan = stress inscaled curtain in horizontal direction (N/mm?)
% scaled distance neutral ine to max. Deflection (horizontal direcion)

(um)

Ws scaled distance between side guides (mm)
Cal = horizontal bow length of upscale curtain (ee Figure A49)
re = Radius of seated deflection (mm)

Pr Pressure (20 N/m?)

e ailes of curtain material (um)

Check rand U by calculation of the curtain bow length (Ca)
Sh = operation (ove Figure 449)
m space inside guides (horizontal sack)

à = oriaontat shrinkage (6)

Proof aah < eax by additional fire test se Figure AT

SBE

Gien Dimensions

000 mm up cal

clear width (tance betwoon si

pace in sid guides (frontal slack)

Ci catuiatd se 1100)

A ee cles cecil

mm thickness of eutin material

Us *035m send tance neutral ine to mac
honor detection

radus of up scale dect

e aaron toni soci
“= Wie dation

Cok max MStIMANICION in anzartalreeten Born by the bi
{he mterccnmecions and he retarung system (248 des)
‘ding mal aca fo tt

Figure B2 — Example

Caleutating the pulling force at the side guides

‘The up scale tensile tension inthe fabric is leading to up scaled pulling forces at the side guides. The
palling force at the side guide can be calculated according to:

Trizol pling force per meter eight (7)

TE stress in sald curtain in horizontal direction
(N/mm?)

ü ches fran material (mm)

See
BN 15260402018

In Figure R3 the results ofthese calculations for diferent examples o system designs are given.

Pang eee tie Gus (ne Ses)
EEE aer Saz]

e [==
a ES;
i al
= Leer
7 Tree
A
EE
a on EU EE DE GE

Figure B.3-— Pulling Force at Side Guides

NOTE ofi inched Fabre lack maybe reduced by fbr stage
‘The fabric andthe side guides shall be strong enough to withstand this pling force.
This has to be approved by a small scale fre test according to AB.

B.7 Maximum fabric stress in up scaled curtain in vertical direction

Additional fabric length in vertical direction
‘To ensure that the curtain of a up scaled system is Jong enough in vertical direction to curve a the
same deflection U, as in horizontal direction the necessary bow length Cys in vertical direction can be
caleulated according to:

vertical fabric length considering vertical
shrinkage

vertical ow length of up sealed curtain
‘additional fabric length of up sealed curtain in

Vertical direction
Ma "Up scaled drop length of intended system
% ‘up scaled maximum deflection (see BG)
Sy vertical shrinkage of curtain material

SBE vo

He r@Dme up scaled op

ah of approved system
up scaled maximum defection

ara shikage ef cutain material

1 een
tz PH te ‘erica bow eng of us sealed cin

bow lngth of 640mm is necessary 1 realizo à

Car m bw shape spaning 3 vericalcistance of 300mm
‘wh a maxima “Cetec of mm

Fee Cee (454) veia! fabr length considering etal ring

A

{8 ail abi long in vrtcal deco is
ize abow shape spaning avais

sance 16000 mm wth « manarum defection of

AFL yy la nm concerning vertical ae sherkage By 1.0%

Figure BA— Example

Maximum fabri stress in vertical direction

‘The maximum fabric stress of an up sealed system in vertical direction is determined by the total
weight of the curtain material and the weight of the bottom bar, assuming the worst case the weight of
‘the bottom bar is carried totally by the curtaln material and ited off the ground.

‘The maximum fabric stress ofan up scaled system in vertical direction can be calculated according to:
‘otal weight of up scaled curtain material and

bottom bar Ck)
mer ‘otal weight of up scaled curtain material (4)
Cr ‘otal weight of upscale bottom bar (kg)
and
‘maximum stress in vertical direcion in up scaled
curtain
E acceleration of gravity (81 10/92)
vs ‘wii of upscale curtain material (mm)
t “nicks of curtain material (mm)

See
BN 15260402018

mario total weight of up scales cur material bg)
Der total weight of up scales botar bar (a)
Regie RoR HOE total weight of up sealed cun material and boton bar (kg)

with of wp soled curtain mato (men)
thickeass efcutin tail (mm)

Acceleration of gay BET vs)

15 Example2

8.8 Maximum Load bearing capacity (Figure A7, Figure A.8)

‘The maximum load bearing capacity of he system in horizontal and vertical direction shall be
determine by two small scale tests.

‘The specimen for determining the load bearing capaci In horizontal direction shall include side
guide, retain elements and stitching if vertical fabric joints are applicable (se Figure 47) During this
test the fabric shall be ind to the upper side of the test frame using a pce of the original sde guide
and shall be rotated by 90° respecting the direction of warp and wef according to the real application.
‘The specimen for determining the load bearing capacity in vertical direction shall include curtain to
tube fixing, parts of the casing contacting the fabric and stitching if horizontal fabric joints are
applicable (see Figure A8). During ths tet the fabric shall be fed tothe upperside ofthe test frame
‘using a plece of the original tube fixing.

‘The load on the fabric during the small scale tests shall be high enough to cause equivalent stress
according tothe calculated stress In the scaled system for approval

Toad during mal sale fire test (N)

mass of ef for sll scale fre test (ig)

a maximum stress in up scaled curtain (N/mm2)

w ‘width of curtain material carying load during
mal scale fire test (mm)

t ‘thickness of curtain material (mm)

NOTE op means fahre tension ether in horizontal rin vertical rection depending ofthe small cle re

er

Calelted maximum secs in up sealed curan onzontalherielörchn)

tala Ain of usin atl nm)
Bor role al gay 81 mé)
W100 th fui materi ung land uring srl can fen to (rm)
DER TEE Les dur ama ee fr oe 09
0
aye mme mass aa fr mal ae re tat 0)

Figure B6 — Example

B9 Calculation of limiting stress

‘The stress in the various load bearing components of the tested fre curtain should be calculated using
the methodology outlined in the examples given in B3, B4 and BS as applicable. The stresses in the
tested components shall be used asthe min stress for those same components in any assessment
calculations that are carried ou forthe same classification period.

Fora reduced classification period the following rules apply:

3) there no temperature measurement fra relevant load bearing component then the maximun
stress in that tested component shall be used asthe Imiting stress. Examples of load bearing
components are: centre of barrel, barel support bracket, axle between barrel and bearing support
‘racket, bearing support bracket/endplat,

1) Where the temperature of a load bearing component has been measured during the test the
limiting stres forthe shorter fre resistance classification periods can be obtained for the relevant
component by adjusting the calculated component stresses in the est specimen in elation t the
rección factors for stress-strain relationship given in EN 1993 1-2:2005, Table 3.1 forthe lower
‘measured temperature using a safety factor of 75 % For example
— calculated stress for load bearing componentin test specimen ost
— tested classification period ts;

— required reduced classification period tp
— permitted stress for same component for reduced period oy

= 83 (reduction factor at temperature at tp reduction factor at temperature at 1) 0,75.

See
BN 15260402018

B.10 Barrel calculations

‘By calculating the moment of inertia (1g) and section modulus (Zp) fr the bare, the barre bending
stress (op) can be calculated assuming fee deflection.

(nl

crea gay“ Ha
where

Dp = Barreloutside diameter (m)

ly = Cartan width (m)

MA = Nelghtof ire curtain aperture (m)

PL = Weight perunit area ofeurtan (g/m?)
Barrel assembly weight (Waa) (8) = 3%)

where
W = Weight of barrel ncn springs ads, tubular motor, (kg)
UW, = Rllweightof curtain inch bottom rail (ka)

ne

ven
29: Bart dm (om)
een

fi

| (man)
amine PA
vu
4g = Barrel moment of inertia (mmf)
Dg = Barrel outside diameter (mm)

Masta (vam?)

Barrel stress (og): u!
rn

Way = Barrel assembly weight (N)

la Barrel length (mm) forfixed barrel bearing onboth barrel supports (mm) or.
‘ends, Distance between intermediate Aoating barre bearing
2 Barre section modulus (m3)

Substituting the deformation factor (E) for Young's Modul then allows a value fr theoretical barrel

deflection to be calculated. The value for Young’s Modulus should be taken from. the
temperature used should be that ofthe barrel measured, or furnace atthe required tine.

For fixed barre bearing:

al.

Free deflection of barrel (dp): = [
For floating barel bearing:

rare JET EE]

(om)
where

Way => Barrelassembly weight (N)

in =. Diane been temedatebarlsugrs
Fo = are deformation factor (N/mm?)

lo Barmel moment ofinera (mn?)

B.11 Barrel support bracket calculations

In case the casing is not able to carry the load of the deformed barrel, support brackets may be

required to limit effects of barrel deflection for example

3) For fabric curtain assembles without a casing where the calculated harrl deflection leads to a
‘reduction ofthe distance between the underside of the barrel andthe underside ofthe lintel bei
Tess than that distance observed at the eof the classification period.

D). For fabric curtain assemblies with a casing where the calculated barrel deflection exceeds the
distance between the underside ofthe barrel and the bottom ofthe casing

9 Forfabric curtain assemblies with Noating barrel bearing.

For fabric curtain assemblies with fixe barrel the barrel support system calculation methodology
uses the general principle ofa balance system in which the theoretical barrel deflection is reduced to
an acceptable level by supporting the barrel with one or more barrel support brackets.

When barre support brackets are used in only one location, the support brackets at that location shall
be capable of supporting atleast 62,5 % ofthe barel assembly weight. Where barre support brackets
are used at two locations, the support brackets at each location shall be capable of supporting atleast
31.25% of the barrel assembly weight Where the casing provides barrel support, the easing shall be
capable of supporting at Teast 62,5% ofthe barrel assembly weight.

I should be noted that brackets may be positioned at no more than two locations. Where a single
brackets required it shall be placed at the location of greatest deflection Where brackets are required
at two locations they shall be at a maximum of 20% of the barre length apart, and they shall be
all spacedatthe location of greatest deflection

For fabri curtain assemblies with ating barrel bearing the total barrel weight has to be carried by.
the total number of support brackets. The brackets should be equallyspaced to ensure an equally
distributed load to al brackets

"The following equations calculate the maximum load that can be supported by a given number of
brackets. Wr 1 is the maximum theoretical load that can be supported, Wr? Is he selfoad of the
bracket, and We3 isthe load applied by the casing. The maximum total load that can then be
supported is W Total

See
BN 15260402018

Barrel support stress:

Wr (bracket potential support):
where

Is = Support bracket moment of inertia (mm)

5B = Support bracket maximum stress (N/mm?)

n= Number of bare supports

a = Distance between centeline of axle and rear of barre support bracket (mm)

y (gane ese bare pot cnt lay andthe pot ret sree
frames) op

Wr2 (bracket component) x

where

>= Barrel support ength (mm)

Support bracket cross-sectional area (mm2)
n= Numnber of barre supports

ET
. [etant] gy
Wr (casing hood component: al
were
dm = Coge

Lon = Casing length (mm)
D = Casing some length
(um

9 = arms)

WrTotal= Wr1 - Wr2-Wr3(N)

there are no supports required Wr Total equal 0. I supports are required Wr Tot equals the
sumof Wr, Wr2,and Wr.

barre support brackets are required, the following shall apply:
WrTotal 2 (Wa x0625)/n

where

Wa => Barrelassembl weight(N)

[Number of barrel support brackets

EEE

B12 Axle calculations
‘The esuitantload on each ale calculated

‘Axle section modulus (2) La,
=
Dh = Adedaneer(om)
From ste estan bending and har rss inthe proposed cane alte
[mern]
‘Aude bending stress (041): Za (N/mm?)
=
Wy = 50% ofbartasembiy weit (8)
Wau = Motor wei)
ta elena
EN ‘Ae section modal (a9)
[2 ” 981 (m/s?)
[ease
Ae sear stress (op Pr apa)
=
Wa 50% of barrel assembly weight (N)

Way, = Motor weight (kg)
Da = Axle dlameter (mm)

Sufficient allowance shall be made inthe ale bearing design for the movement ofthe end of the axle
‘eto thermal expansion and deflection ofthe barrel by using the plysical properties in EN 1993-1-

22005.

B13 Endplate calculations

‘Only the bending stress in the endplates is considered as à fabric curtain assembly stability fllure
would occur by excessive bending ofthe endplate prior to any shear falure occuring, The bending

tresses are calculated as follows:

Weigtofangange(Wesye | 10 Jan
where

hg = Bate ight)

AFA = Fiding angle cross-sectional area (mm?)
Pte deny tse = 7850 4g?

See
BN 15260402018

Y ” 981 (m/s?)
Endpat horizontal roseseevona area (as) "= te] (mu?)
were

we = Endplat width (mm)
fg = Bndplate thickness (mm)

‘The area and length correction factors give a value that describes the relationship between the
endplate fing ange and the endplate

e]

‘Area correction factor (4): 'E J (dimensionless)
Fil © eget
A Endplate cross-sectional area (mm?)

D)

Length correction factor (g): LE | (dimensionless)
wen

Lea = Fixing angle leg length (attached to endplate) (1
we + Beto)

Endpate bending stress (op):
where
We = 50% ofbare assembly weight (8)

tg = Adleendt bearing length (mm)
Wy, = Load on endplate dueto motor (N)
yg = Bective motor shaft length (mm)
y= 84 se) Gaimensontess)
= Endplatethickness (mm)
tot <p 2
ndplateslfweight weight (is): 1d m
where
ng = Endplateheigh (mm)
we Endplate width (mm)
te Endplatehickness (mm)
Patel
9 = opt (mst)

{roe |

centre loading (WEL) 0

where

Wa = 50% ofbarelassenbiy weight (8)
Way = Weightonendplate from motor (1)
‘Totalendplatetoad (u): “Wi. * Was. eu ay
where

Wey = Eccentricioading(»)

Wes, = Endplateselfweight (N)
Fig angle weight (N)

Wes

Shea stress in all endpate fing bolts (KE)
where

Wp = Total endplate weight (N)

np = umber of bolts

2 = Totalareaof bolts (mm?)
‘Tensile force in top endplate fixing bolt (PEFE)

(ara) We res.) (Wi re) ee,
0

Ont eme]

= Motorweight (D
Ya, = Distance from walltomotorcentreline (mm)

Wy = 50 %ofbarrel assembly weight (D

va = Distance fm alt ade centreine (mm)

West = less (N)

yes = Distance rom walt endplate cenrtine (mm)

Wem, 2 ‘Fiingangle weight)

ae, = Distance rom val endplate ing angle centrline (mm)

YEFBA to N = Distance from bottom of endplate to each fixing bolt, where Nis the total number
‘of bots counting from bottom t top (mm)

fel
‘Tensile stress in top endplate fixing bolt (ogg) 1°°°® J (N/mm?)
were

Fara = Tesla top enden bo)

a

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BN 15260402018

GEFB = Areaoftop endplate fing bit (nun?)
‘The maximum principle stresses in the bolts resulting from the combined stresses can then be
calculated

‘Maximum principle tensile stress in top endplate fixing bolt
[are

a Net

‘Maximum principle shearstressin top endplate sing bolt

Cm unn?)

Era
where
Topp istheshear stress in

I endplate fixing bots and
‘ogre isthe tensile stress in top endplate fixing bolt

B.14 Bottom bar expansion allowance

I the length of the bottom bar is larger than the tested length the expansion allowance has to be
Increased according to the coefcient of thermal expansion of the used material (or example mild
steel 5mm (dimension E of Figure A) for every Im Increase ln width), Ie width ofthe cutaln Is
less than the tested width, the expansion allowance shall be the same as tested. Fr example: a curtain
tested with a bottom bar of 000mm and Sm clearance between bottom bar and guides (both sides)
‘needs 10 mm expansion allowance when scaled up toa length of § 000mm.

B.15 Maximum length of the bottom bar resp. bottom bar sections see
Figure A.49 / Figure A.SO

Free deformation of components can be scaled based on the are radius determined during the fre test,
providing that this curve is small enough to prevent thatthe increased sizes does not lead to integrity
loss or additional loads on neighboured pars. Assumption for ths method is the raus ofthe bottom
"ar is not depending onthe bottom bar length (resp. bottom bar section) relevant for scaling during
the fire test.

Wer gue S247? = ("= 28°
p= ssa
were
esmas = Maximum bottom bar length (mm)
5 = Dance Moor to mas Dellection (vertical rection middle opening) (um)
We + Distance between side guides (mm)
r = ads of defection (nm)

A Bottom bar constructed out of individual parts the same as tested re to scale.

ELLE

B16 Allowances for thermal expansion

If size increase (width, height, area) of the curtain assembly isto be considered for the extended
application, allowances for thermal expansion shall be provided as the expansion of the metal
components may cause excessive forces on the supporting elements, which, could result in their
failure under fire conditions. The mechanisms/devices designed to allow thermal expansion for the
‘metal components ofthe curtain assembly hall be clearly described, These devices shall be included
{nthe test samples. The thermal expansion characteristics of the materials shall be considered for
dimensioning the allowances in the test samples and in the barriers with extended dimensions. The
Plyslcal properties given may be used for these calculations.

‘The need for expansion allowances shall be considered in the tube, side guides, bottom bar, tube
casing, shaft et,

See
BN 15260402018

Annex €
(normative)

Calculations for curtain assemblies carrying mainly vertical loads
(overlapping modular curtains, curtains without retaining assemblies)

C1 Scope of calculation

‘curtain systems are different from typical door systems due to their not rg losure element typically
made of thin walled materials as for Instance woven oF ktted fabrics and fol, These closure
lements are not able to carry significant loads normal to thelr surface (eg caused by pressure load)
‘due to their characteristic lack of bending sine That's why itis assumed that curtain systems can.
‘only conduct tensile forces by tensile stress in-plane to thelr surface, Its assume that compressive
forces are not conducted in-plane to their surface.”
‘ts assumed that the stresses in the fabric curtain can be approximated by a model ofa thin-walled
sphere under inner pressure where the stresses follow the vessel formula
o be able to calculate scaling possibilities of textile assembles in a consistent and handy way, the
assemblies are reduced toa simplified model as EXAP calculation bass. For curtain assemblies having
a modular overlapping closure element or a system without a retaining system at the side guides ts
Assumed thatthe loads onthe textile curtain being caused by pressure are mainly carried in vertical
“iretion by the weight or the iting force of the fabric and he bottom bar
‘Due tothe practical limitation in dimensions of full scale Are tests according to EN IG overlapping
modular assemblies are limited within this scope toa maximum of three modules and two overlapping

C2 Calculation principles

The nea endo for checking the proposed specications is asd on aceptes engineering

fr princes which ay be modified ony ccm with sushi gen nde Tola

de

‘The values formate. properties uch as You Hus al be taken rom ISO for

pere mesuré fr the fad bearing components a he mure secos tine. I
mere of components have pot been tear thn the face trp cord to

na ur salon me sal be ued less thers stated

C3 Calculation method increasing curtain width and height

Up scaled systems have to be constructed so that as a minimum requirement the Integrity of the
curtains guaranteed n case offre. Due to the fat that incase of fire the curtains not only exposed to
very high temperature but also to variable and high pressure, the deflection behaviour of the
pressurized curtain needs specal attention inorder to predict the behaviour of a up scaled system,
‘The main components ofa fire curtain are its casing, barrel, curtain, bottom bar and side guides. The
fabric is held at its edges into a more or less stable postion by atleast some of these components
‘Because the textile curtain on lt own à deflctable membrane clamped between lts edges, lt forms
‘when pressurized shape mainly defined by the degree of freedom ofits edges.

A a result from this modeling method up scaled modular systems or closed systems without side
guides or retaining system have to be able to cary higher loads, especially in vertical direction, to
Withstand the higher pressure load. Therefore they need especially sulficent bottom bar or curtain
Weight suicient form stability ofthe oling mechanism and ts supports, as well as silent vertical
tensile strength of the fabric to balance the vertical iting force caused by the pressurized curtain.

n

ELLE

ile modular systems or systems without retaining system In he side guides do not carry significant
loadin horizontal direction according 1 the calculation model they do not need overcapacity of fabric
strength or additional strength of side guides for up scaling in horizontal direction. The overcapacity in
{he curtal components needed fr up scaling in vertical direction re determined in a small scale fre
testsas defined in Figure AB,

Shrinking of curtain material during fre test may change the theoretical bow length and radius ofthe
curtain shape resulting in failure ofan up scaled system due to increased tensile tension inside the
fabric and the casing oF iting ofthe bottom bar. Therefore the shrinkage of the curtain has also to be
determined.

— Ina frst step the shrinking of the curtain materials calculated based on measurements during
scale ire test according to CS.

— ina second step the vertical bow shape ofthe approved up scaled curtains calculated based uy
the vertical textile slack from wich fllows the vertical pulling force and the stress in vertical
direction according to.

— Ima third step the horizontal bow shape ofthe approved up scaled curtain is calculated from
‘which follows the necessary horizontal textile slack in horizontal direction according to G7.

— Ina fourth step the calculated stress is compared to the maximun stress which was measured in
‘the additional small cal test for vertical direction according to CB.

fi step the overlapping zone and end modales ae sealed according to C9.

— ina st step the static requirements ofthe complete mechanical structure of the scaled systems
approved by the calculation formulas according to C10 to C17.

C4 Test Specimen for modular systems

‘The test specimen used for the full scale fire test according to EN 1634-1 has to be built out of a
maximum of three curtain sections and two overlapping zones (see Figure 4.52) The separate curtains
reattached to the separate barres andthe bottom bar according tothe appropriate system design.

‘The overlaps tested represent the smallest and largest overlap that may be used even forthe up scaled
system.

verlas smaller or large than the: zones tested in the initial Are test have tobe tested in
separate full scale fire test according to

CS Shrinkage of curtain

Shrinkage of curtain material may affects the shape ofa pressurized curtain

‘This may lea to failure ofan up scaled system due to increased tensile tension and stress inside the
fabric and casing or iting off the bottom bar. Therefore the shrinkage of curtain material has to be
determine

Determining the shrinkage of curtain material is done by measurement of maximum defection of the
closure element surface and the gap between the bottom bar and the floor during ful sale ire test.
Because ofthe lack of a complete closed horizontal ration chain for modular systems or systems
‘without retaining systems atthe side guides it is not possible to determine horizontal shrinkage ofthe
‘curtain material by measurement of deflection during fre test. Horizontal curtain shrinkage does nat
fect the deflection ofthe curtain at these systems. This I is assumed that horizontal shrinkage Is
‘equivalent to vertical shrinkage

At the beginning ofthe full sale fire test the curtain assembly has tobe pressurized to constant 20 Pa
allover the surface ofthe system by the ventilation system ofthe furnace. At that state the maximum
“eflection Uzg ofthe closure element surface and the maximum gap between bottom bar and Moor.

7

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BN 15260402018
Level Gi shall be recorded. The postion of maximum deflection and maximum gap is typically near to

the middle ofthe system.

During fie test the maximum deflection U; and maximum gap G between the bottom bar and the floor
level G should be recorded every 5 min uni Ur comes toa minimum Us yi and Gy to a maximum
tama Tiss the most critical moment during Are test concerning material shrinkage.

If no shrinkage but material stretching occurs during fire test Vin may be larger than Un and
Gtamax may be smaller than go

Assuming a spherical curved curtain shape during fire test the horizontal and vertical curtain
Shrinkage could be calculated according tothe following formulas.

Shrinkage in vertical direction

vertical bow length ofthe curtain at the start ofthe fre test

minimum vertical bow length ofthe curtain during the fire test

nm earheightoftestspeeimen
wo ‘maximum deflection recorded at the tart of the ire test
Urmin minimum of maximal defection recorded during fre test

Go ‘ap between botor ar and or at the start ofthe ire test
Sumax ‘maximum gap between bottom bar and loo during the retest

"horizontal shrinkage equivalent to vertical shrinkage

{ati possible, that a certain amount of th recorded gap between bottom har and floor levels caused
by thermal deformation of the bottom bar itself and not by curtain material shrinkage. But while
‘nereasing this gap "without shrinkage” has an “opposite influence” to the calculated bow length ofthe
‘curtain tists fall compensated by the formula)

DU TE

Calculation ofvaticel ahinkage
by calling dfrences in vrtical bow length of abc accosing to ferences of maximum
tection and drences of gap betwen tom bar and foot

Hi +700 mm cher height tes specimen
yp +30 aa | manum defection recoded at the sta of he fe test
cain =20 nn irivmum of axial defection recorded dung fre est,
©,g:*mm gap been tom bar and oo the sta ofthe fi test

Chm #15 maximum gap between baom bar and Suing he fr test

E)

Gnome O
O a

He )
Euruimeätitn mum etico nth the cara ding hee

tet

Cyan, [(1-010)- (1 Sim]

Tran

199% shrinkage in voii

Figure CA — Example

C6 Maximum fabric stress in up scaled curtain in vertical direction

“The maximum curtain stress in vertical direction canbe calculated using the vessl formula assuming
aspherical curved shape of the curtain between the casing (barrel) and the bottom bar.

‘The pressure loa for calculation set to constant 20 N/m? (20 Pa) allover the surface of the system,
“The Hs the achieved height ofthe up scale system. The Us has tobe calculated.

EAN A
LA LA
Ber,
rer,
where

sv = stressinscaled curtain in vertical direction (N/mm2)

7

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BN 15260402018

Us = scaled distance neutral line to max, Deflection (horizontal direction) (mm)

Ma = sealed stance betwen casing and oor (roplengt) (nn)
Cav = vertealbowlengthofupsealed curtain
fe = Radius ofscaled defection (mm)
Ps Pressure (20 N/m?)
0 “TWilnessofcutatn material (mn)
eckrgand Ugh alain ofthe ctain bow length (C)
Er 7 Masern) fone
Sy = verte sek (don abi length in verti!
“retion)
& = vera shrinkage 4)
Proof y € Os atonal fire test se Figure A
en Dinensone:
u sdoan up scaled op length
tyst.an via sick
Dares E sy" 606m bow enh of up scales
Alta vertical Grecian
AS date inn tan ra

Uy-037m sealed etance nut ne to mar
onzontal defector

ser t24n radu ofup scaled defection

tension uy se
‘ani vericaldrecton

jen in etica! rection bore by the abi,
the bral xing ung ema

ému

Figure C2 — Example

15

SBE

Caleulating the pulling force at the bottom bar

‘The up sale tensile tension in te abri s leading to up scaled pulling forces atthe casing and the
"otto bar. The pulling force tthe bottom bar ean be calculated according to:

vertical paling force per meter width (N/m)
su stressin scaled curtain in vertical direction (N/mm?)
t thickness ofcurtaln material (mn)

‘The bottom bar and the fabric shall be heavy enough to balance (compensate) this piling force to
prevent the bottom bar from lifting off the ground, Otherwise there shall bee. a lacking device sing
{he bottom bar tothe ground.

vertical iting force per meter width (N/m)

Em ‘mass of bottom bar per meter width (g/m)
me ‘mass of fabric per meter width (g/m)
E acceleration of gravity (981 0/82)

In Figure C the results of these calculations or diferent examples of system designs are given.

Un For Goto Ba (Modular puto
Denon

gta no

Figure C3 — Ring force atbottom bar

NOTE Nofabricshrinkage is inched Fabric lack maybe reduced by fabric shrinkage.

‘The casing and the barrel shall be stable enough to camy these loads. This has to be approved by
caution according to C11 10 C14.

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BN 15260402018

C7 Maximum fabric stress in up scaled curtain in horizontal direction

Due to the fact that for modular curtain systems or systems without retaining system in the side
guides it is assumed that they do not carry significant load in horizontal direction no calculation for
‘maximum abri stress in up scaled curtain in horizontal direction based onthe up scaled horizontal
Dow shape of the fabric is necessary.

Additional fabric length in horizontal direction

"To ensure that the curtain ofa up scaled system Is wide enough in horizontal direction to curve at the
same deflection U, asin vertical direction the necessary bow length Cin horizontal direction can be

calculate, From this allows the additional fabric length in horizontal direction.

‘vertical fabri length considering vertical shrinkage

vertical bow length of up sealed curtain

addtional abri length of up scale urtalnn horizontal direction

Ws ‘up scaled clear width of approved system
Us ‘up scaled maximum deflection (see G6)
a horizontal shrinkage of curtain material

‘The additional fabric length sha be equally distributed and added to all overlaps of an approved
system. These dimensions have tobe added tothe upscaled overlap dimensions according to C9.

For systems without retaining systems at the side guides especially the overlap inside the side guides
have to be enlarged according to these dimension. So this dimension has to be added tothe original
‘overlap inside the side guides ofthe tested system ofthe fll scale fre test.

WE mm up sealed clear wth of approved eye
scaled maximum defection
‘erica shinksge of cutsin mateñal

horizontal shinkage quiet veical hrnkage

hizortal bow length of up scaled cutain

ow long of 10036mm is necessary to realize à
30m shape spaning a horzoral tance ef
Amen th mamar deñseton 0370

Bunte) ‘tic ie gh oni

y veia string

Pepo

AL Flan My

honzortal tence of 10009mm va maximum
section of 370m conceming horizontal bi
Shinkage by 10%

AFL ye tha

Figure CA — Example

DU

C8 Maximum Load bearing capacity (Figure AB)
‘The maximum load bearing capacity of the system in vertical direction shall be determine bya small
sale test

‘The specimen for determining the load bearing capacity in vertical direction shall Include curtain to
tube fixing, parts of the easing contacting the fabric and stitching If horizontal fabric joints are
applicable (see Figure AS). During ths tet the fabric shall be ed to the upperside ofth test frame
‘using apiece ofthe origina tube xing,

‘The load on the fabric during the small scale tests shall be high enough to cause equivalent stress
according to the calculated stress in the scaled system for approval

Toad during smal scale fire test (N)

mass of heft for small scale ire test (kg)

o ‘maximum stress inup scaled curtain (N/mm)

w “width of curtain materia carrying load during small scale fire test (mn)
thickness of curtain material (mma)

NOTE ay mean fabri tension in vertical direction.

20144, eaelated maximum sss in up sale cursinhrizomstiwres dracon)

totam Meinese of usin mat rm)

acceleration of gay (91 mie)

th fui mee ing oad Surg mal scan fen tt m)

Faro land ing mal sale fetes 09)
must mas ot for sma sal retest i)
Figure CS —Example

C9 Up scaling overlaps and end curtains

Inthe following text equations are derive for calcuating:
‘The required minimum width of the end curtain.
‘The required minimum width of the overlap.

‘The values for the minimum width of the end curtain and the minimum width of the overlap are
calculated based upon values recorded during afr test.

‘The general calculation procedure is presented below.

For an overlapped system where only two curtains are used they should be of equal width with an
overlap as stated in Table 1.

General methodology

From the dimensions ofthe fire tested end curtain and the width ofthe overlap of the fre tested
curtain factors derived for calculating the required minimum width ofthe end curtain,

7

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‘Also from the dimensions ofthe fire tested end curtain and the with ofthe overlap ofthe fire tested
‘curtain factors derived fr calculating the required minimum width ofthe overlap,

For systems without a retaining system at the side guides the overlaps at he side guides are put on a
level with overlaps between modular overlapping closure e

Input parameters
eight ofthe ire tested curtain: Im}

‘Width of the tested end curtain: We [m] Figure À.52
Width of the tested overlap: Oy [m] Figure A52

‘Measured deflection during the re test: U [m] Figure A51
Proposed height: Hp

Endsurtaln

o Factor for minimum width ofthe end curtain:

Le = Width of tested end curtain / Height of tested curtain

= Wo / Hy [dimensionless]

Vip = Required minimum width of the end curtain

ET
Oran

Lo = Factor for minimum with of the overlap:

Fo = Width of tested overlap / Width of narrowest tested end cu
= 04/W [dimensionless]

my = Required minimum width ofthe overap

RW
foxWp

“The minimum required end curtain with and the minimum required overlap hal be calculated based
upon the actual deflection recorded and the actual end curtain dimension tested, and shall be
presented as shown in Table C1.

C.10 Example for increasing overlapping systems

Inthe following worked example factors are derived for calculating

— the required minimum width ofthe endeurtaln;

— the required minimum width ofthe overlap.

"Example: a fire resistance test on a fre curtain with an overlap has demonstrated that a fie curtain
with dimensions:

‘eight ofthe Are curtain tested Hy

"The defection shoud be measured at mil ight ofthe recortan.

DU

Width of the overlap tested: 04 = 0,60 m
The measured deflection during the ire test was U = 0,15 m.
From the dimensions ofthe end curtain and the width of the overlap factor is derived for scaling the

required minimum with of the end curtain and the required minimum width ofthe overap.
curtain
fe Factor for minimum width ofthe end curtain:

fe 174 /300=058
Vip Required minimum width ofthe end curtain = fox Hp
058. Hp
Oran
fo= Factor for minimum width of the overlap:
fo= Width of tested overlap / Width of narrowest tested end curtain
=060 /174-03448
jy = Required minimum width ofthe overlap = fox Wp
CET

ypica required minimum width ofthe end curtain and minimum width ofthe overlap are presented
in Table C1 below for various heights ofthis ire curtain,

‘Table C1 — Minimum required width of end curtain and minimum required width of overlap

Height (Hp) | wa) | Wieth Ory)
ofend of
curtain ‘overlap

m Im Im]
1 058 02
2 146. 040
3 17 17]
4 232 080
5 290 100
6 348 120
7 406 140
8 464 160
> 52 10
10 520 200
The maximum height to be determined by C8

NOTE Ti

table only apples to overap yster with thre curtain.
‘The deflection U is not used for calculation of overlaps and end curtains at all

so

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BN 15260402018

C11 Calculation of limiting stress

‘The stress in the varios oad bearing components of the tested fre curtain should be calculated using
the methodology outlined In the examples given in Clauses 3, 4 and 5 of this annex as applicable, The
stresses in the tested components shall e used as the limiting stress or those same components in
any assessment calculations that are carried out fo the same classification period.

Fora reduced classification period the following rules apply:

3). sf there fs no temperature measurement fora relevant load bearing component then the maximum
stress in that tested component shall be used asthe Hiniting stress Examples of load bearing
components are centre of barrel, barel support bracket, axle between barrel and bearing support
racket bearing support bracket/endplate;

$), where th temperature of à lad bearing component has been measured during the et the
lng Stes er the sore fre restante station pero canbe oaned fo te rl
Component by angie called component essen the et species lean tthe
ion ators or stresestrainreatonshppven in EN 19921-22005 Table 3 for he lower
er temperature ug seo ctr of 759 Far eam

— calculated stress fro bearing componentin test specimen og;

tested classification period

— required reduced classification periods

permitted stress fr same component for reduced period op

= 0 (reduction factor at temperature at erreduction actor temperature at 1) 075.
C2 Barrel calculations

‘By calculating the moment of inertia (1) and section modulus (Zp) for the barrel, the barrel bend
stress (op) canbe calculated assuming fee deflection.

ee

where
Da = Rarreloutside diameter (m)

ho = Curtain with (m)

MSA = Welghtoffire curtain apertre (m)

‘pL = Weight perunit area of curtain (g/m?)

Bae assembly weight (Wa) (N)=[ +]

where

Wa = Weight of barrel including springs, ads, tubular motor, et. 9)
Wu = Fullweigh of curtain including bottom ral (49)

feas] =

Barrel moment of inertia (Ip):

where
a

x 15260.
ZO

Dg = Rarreloutside diameter (mm)
= Barrell thickness (mm)

nina |

where

IB = Barrel moment of inertia (mm*)

Dp = Barrelousie diameter (mm)

A LP) (es)

where

Way = Barrelassembly weight)

ip = Barellength (m) forced bare bearing on both barrel supports (mm) for
end Distance between intermediate floating burl bearing

28 = Barel section mods (m3)

Substituting the deformation factor (E) for Young's Moduls then allows a value for theoretical barrel
election to be calculated. The value for Young’s Modulus should be taken from the
temperature used should be that ofthe barrel measured or furnace atthe required tine.

For fixed barre bearing

(612)
Free deflection of barre (dg): = L 2847 \ Be%J5 J) cop)
ptt ttt

mms EEE].

were
Wy = Bare asemby eight (0)

Im > Distance beten intermediate are supports (nn)
En Barrel deformation factor (N/mm?)

le Barrel moment of inertia (mm)

C.13 Barrel support bracket calculations

Support brackets may be required to limit effets of barel defection for example:

2). For fabri curtain assembles without a casing where the calculated barrel deflection leads to a
reduction ofthe distance between the underside of the barrel and the underside ofthe lintel being
Tess than that distance observed at the end ofthe classification period,

1) For fabric curtain assemblies with a casing where the calculated barrel deflection exceeds the
istance between the underside ofthe barre and the bottom of the casing

e

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BN 15260402018

+), For fabric curtain assemblies with Noating barrel bearing.

For fabric curtain assemblies with fixed barrel the barrel support system calculation methodology
uses the general principle of a balanced system in which the theoretical bare deflection is reduced to
an accepable level by supporting the barre with one or more barre support brackets.

‘When barre support brackets ae used in only one location, the support brackets at that location shall
be capable of supporting atleast 62,5% ofthe barel assembly weight Where barre support brackets
are used at two locations, the support brackets at each location shall be capable of supporting atleast
31.25% ofthe barrel assembly weight

It should be noted that brackets may be positioned at no more than two locations. Where a single
brackets required it shall be placed at the location of greatest deflection Where brackets are required
at two locations they shall be at a masdmum of 20% of the barrel length apart, and they shall be
Sally spacedat the location of greatest deletion

For fabric curtain assembles with floating barrel bearing the total barrel weight has to e carted by
the total number of support brackets. The brackets should be equally spaced to ensure an equally
¿listributed oad to all brackets

‘The following equations calculate the maximum load that can be supported by a given number of
brackets Wri is the maximum theoretical load that can be supported, Wr? fs the sefload of the
bracket, and WF i the load applied by the casing. The maximum total load that can then be
supported is W Total

Barrel support stress:
ne

Wir (bracket potential support oy

where

‘SB = Support bracket moment of inertia (mm).

@SB = Support bracket stress (N/mm?)

n= Number of barre! supports

a stance between centreline of axle and rear of barrel support bracket
(am)

y = Distance between barrel support centre of gravity and the point of stress (ram)
greatest

verre "|
were

» Barrel supportlength (mm)

ASB = Supportbracketcross-sectional area (mm)
" Nunnber ofbarrelsuports
9 9.81 (m/s?)
[starts] op
‘Wr 3 (casing hood component) 10
where
few = Cain hemes (m)

Lon = Casing length (mm)

N 152694
RZ
casing soit ent (mm)
9 - sans)
We Total = Wr -Wr2-Wr3(9

there are no supports required Wir Total’ equals 0. f supports are required Wr Total equals the
sumof Wr, Wr2,and Wr

barre support brackets are required, the following shall apply:
MirTotal > (Wpq 0625)/n

where

Wa = Barrel assembly weight (N)

n [Number of barrel support brackets

.14 Axle calculations

‘The resuitantload on each ale is calulatede

er

|
=
ara
A ENT

Je

OA D La
A Le
where
Wa = 50%ofbarel assembly weight (N)
Wa = Motor weight (kg)
La = Astetength (mm)
Za” Asesection modulus (ma)
0 921 (0/52)
ETAPA)
se shear stress (042): Dis an)
where
Wa = 50% ofbarel assembly weight (N)

Way = Motorweight (kg)
Da = Anedlameter (mm)

Sufficient allowance shall be made in the ale bearing design for the movement ofthe end ofthe axle
‘due to thermal expansion and deletion ofthe barre by using the physical properties in EN

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BN 15260402018

15 Endplate calculations
‘Only the bending stress in the endplates is considered, asa fabric curtain assembly stability failure

would occur by excessive bending ofthe endplate prior to any shear fallure occuring, The bending
tresses are calculated as follows:

teat)
Weight inane (Wee) v0 Im
wien

hg = Andplateeight (nm)

Aen =. sng ange cose sectional aes (umd)

Pewe = dena of ste = 7050 aj?
ET

Endpat brizontal rose seeionaarca (4) * Yee] (mu?)
tere

we = Spat with (mn)
AS

‘The area and length correction factors give a value that describes the relationship between the
endplate fing angle and the endplate

ea

Fixing angle cross-sectional area (mm?)
Endplate cross-sectional area (mm?)

—

Length correction factor (g):
where
Léa = Fixingangleleg length (attached to endplate) (mm)

we date with (mm)

cana (mn?)

7 te
Endplate bending stress (Op): id
where
We 500 far assent weight)

Lg = Axle end bearing length (mm)
Wy, = Load on endplate due to motor (N)
Ly, fective motorshaftlength (mm)

DU TE

y= 119 +] aimensiontess)
fg = plat knee (mm)

FEndplat self eight weight (gs
where

fig = pate eight mm)
we = Endplate wid (mm)

te plat thcness (mm)

steel density ofsteel = 7850 kg/m?
= Hand

centric loading (1)
where

Wa = 50% otbarrel assembly weight (8)
Way, = Welghton endplate from motor)
‘Tota endplatetoad (Wiz: "Wi + Mase Vs a
where

Wa = centre loading (M)

West, = Endpate see (0)

Wee, = din angle weight)

Shear tres in ll endplate fixing bolts (rg)
where

Wy = Totalendplate weight (N)
np = Numberofbolts
28 = Totalareaofbolts (mm?)

‘Tensile force nop endplate fixing bolt (FEFB)

(ara) (Wh Cm es.) (We vee) yea |
0

[EE re)

where
Wa, = Motor weight)

Ya, = Distance from wallto motorcentrelne (mm)
wa = 509% of bare assembly weight (N)

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BN 15260402018

ya = Distance from wallto ale centreline (mm)
Wes, Entplatesewelg (N)

yest = Distance rom wallto endplate cntrlie (mm)

Wes, = Fisngangleweight(n)

Yael = Distance rom wall to endplate fing angle cntrelin (mm)

YEFBI to N= Distance from bottom of endplate to each fing bolt, where Wis the total number of
bolts counting from bottom to top (mm)

Ea
Tensestressintopendhlate fn ol (ope) [°° (mm?)
where

app = Tensile force in top endplate ing bolt (N)
AFB = Area oftop endplate xing bolt (mm)

‘The maximum principle stresses in the bolts resulting from the combined stresses can then be
calculated

‘Maximum principle tensile stress In top endplate Bing bolt

dl

SEFBmax (N/mm?)
Maxim principle shear stress tp endplate xing bot

oun

Termas (N/mm?)
where
“gris the shear stress in all endplate fixing bolts and

‘ogre isthe tensile stress in top endplate fixing bolt
C.16 Bottom bar expansion allowance

the length of the bottom bar is larger than the tested length, the expansion allowance has to be

increased according to the coeficint of thermal expansion of the used material (for example mild

steel 5mm (dimension E of Figure A3) for every im Increase In width). he width ofthe cutaln is

ess than the tested width, the expansion allowance shall be the same as tested. For example: acurtain

tested witha bottom bar of 3000 mim and Smm clearance between bottom bar and guides (both sides)
ees 10 mun expansion allowance when scaled up toa length of 4 000 mm.

x 152691
ee)

(C.17 Maximum length of the bottom bar resp. bottom bar sections see
Figure A.49 / Figure A.SO

Free deformation of components can be scaled based on the are radius determined during the fire test
providing that this curve fs small enough to prevent thatthe increased sizes does not lead to integrity
loss or additional loads on neighboured pars. Assumption for ths method isthe raus ofthe bottom
bar is not depending on the bottom bar length (resp. bottom bar section) relevant for scaling durin
the fire test.

where
We = Maximum bottom bar length (mm)
s Distance Noor to max. Deflection (vertical direction, middle of opening) (mm)
m Distance between side guides (mm)

r Radius of deflection (mm)
‘bottom bar constructed out of nda pars the sane as tstedis re to scale

C18 Allowances for thermal expansion

If size increase (width height, area) of the curtain asembly isto be considered for the extended
application, allowances for thermal expansion shall be provided as the expansion of the metal
components may cause excessive forces on the supporting elements, which, could result in their
failure under fire conditions. The mechanisms/devices designed to allow thermal expansion for the
‘metal components ofthe curtain assembly hall be clearly described. These devices shall be included
{nthe test samples. The thermal expansion characteristics of he materials shall be considered for
dimensioning the allowances in the test sample and in the barriers with extended dimensions. The
physical properties given in EN 1993-1-2 may be used for these calculations.

‘The need for expansion allowances shall be considered in the tube, side guide, bottom bar, tube
casing, shaft.

See
BN 15260402018

Bibliography

[EN ISO 13943, Fire safety — Vocabulary (150 13943)

EN16034 Pedestrian doorsets, industrial, commercial, garage doors and openable windows — Product
standard, performance characteristics — Pie resisting and/or smoke control characteristics

Hardware performance sheet (HPS) — Identification and summary ftest evidence to
Jaciltaeth interchangeabiliy of building hardware fr application to fie resisting and/or
Smoke control dorsets and/or openable windows

ENI5723 Extended application report on the fre performance of contruction products and building
elements

ENISZ5£-A, Extended application of results from fre resistance tests — Non-loadbearing walls —
(Glazed constructions

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