Refuse Chute

Building Services

1. REFUSE CHUTE A waste disposal system
Ar. Rameez R. Gazi
Department of Architecture
School of Technology

2. Refuse Chute
#Refusechuteisameanoftransportingwastematerialsby
chute(duct),fromthepointofdisposalinhighriseresidential
orofficebuildingtoadiffusecollectionroomatthebaseof
thechute.
#Applications-Originallywasinstalledinhospitalsandhotelsfor
theverticalmovementofwasteandbaggedsoiledlinen.
02-Jul-17 Rameez R. Gazi, Dept. of Architecture 2

3. Refuse Chute …
Can be installed in –
•Residential,commercialbuildingsandmalls.
•Inanyduct,commonlobbies,landings,staircasemid-landings,utility
ducts,drybalconiesandkitchens.
•Ifonfloorlevel,IntakeHoppersshallbeateveryfloorlevel
•Ifatmid-landing,IntakeHoppershallbeatalternatefloorlevel.
02-Jul-17 Rameez R. Gazi, Dept. of Architecture 3

4. Refuse Chute …
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5. Refuse Chute …
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6. Refuse Chute …
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7. Refuse Chute …
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8. Refuse Chute … Advantages
•Facilitatestotalbuildinggarbagecollectionatonesingle
point.
•Garbagedisposalwithease&utmosthygiene.
•ReducesPowerconsumption.
•"Dry"&"Wet"garbageseparatecollectionpossible.
•Reducesmanpower.
•Diameterofchuteused–
Residential–450–600ø
Commercial–600ø
Malls/hotels/hospitals–750ø
02-Jul-17 Rameez R. Gazi, Dept. of Architecture 8

9. Refuse Chute … Intake Hoopers …
•Topopening,bottompivotedhopperforGarbagechute
•FireratingshouldcomplywithNationalBuildingCode2005,clause
3.4.8.3.
•ConstructedofStainlessSteel.Fiber,Plasticchutesarenotallowed
consideringfirehazardorreactiontoprobableacidicwaste.
02-Jul-17 Rameez R. Gazi, Dept. of Architecture 9
CHUTE DIAMETER
Max. Hooper
Size
Bottom pivoted
450 300 x 400
600 400 x 450
750 600 x 600

10. Refuse Chute … Intake Hoopers …
•Chuteshalldirectlydischargeintotrolley,collectionbinor
compactor.
•Availableinplastics/galvanizedsteel.
•Std.capacity:-240/330/660/770/1100liters.
•Diversionshallnottobeallowed.
•Dischargeendshallhaveafirecutoffdoor.
•Standardresponsefiresprinklersof68
o
Careprovidedinsidethe
chute.
02-Jul-17 Rameez R. Gazi, Dept. of Architecture 10

11. TRAPS
02-Jul-17 Rameez R. Gazi, Dept. of Architecture 11

12. Traps…
•Trapsareanimportantcomponentofaplumbingsystemfittedatthe
endofsoilpipesorwastepipestostopinsectsandverminandfoul
gasses(odour)comingoutofthesoilpipeorwastepipeintothe
buildings.
•Itisdevelopedordesignedsuchthatitretainsasmallquantityof
wastewaterfromthedischargeoffittingtowhichitisattachedasa
barriertopreventfoulgassesorairenteringthebuilding.
•Trapsshallbeofself-cleansingdesignwithuniformboreandshallnot
bedependentoninternalpartitionsorothermovablepartsfor
retentionofwaterseal.
•Theyshouldgenerateenoughvelocityfromtheavailableflowto
haveaself-cleansingeffectwithasmoothfinish.
02-Jul-17 Rameez R. Gazi, Dept. of Architecture 12

13. Traps…
•Somemanufacturedfixtures,e.g.waterclosets,bedpanwashers
andcertainmodelsofurinalshaveintegraltrapsbuiltwithinthebody
ofthefixture.
•Diameterofthetrapshallinnocasebesmallerthanthediameterof
theoutletofthefixturetowhichitisconnected.
•Connectionofatrapintoanothertrapshouldnotbepracticed.
•Diameterofoutletpipefromafloortrapshallnotbelessthansizeof
thetrapoutlet.
02-Jul-17 Rameez R. Gazi, Dept. of Architecture 13

14. Different types of traps
NahaniTrap or Floor Trap
•Providedinthefloortocollectwastewater
frombathroom,washarea,washbasin,and
kitchensinketc.
•NahaniTrapisprovidedtopreventthefoul
gassesenteringintothebuildingbyproviding
awatersealofminimumdepthof50mm.
•FloortrapsareavailableinPVC,UPVCandCI;
theyarewithoutventpipebutremovable
gratingisprovidedatthetopofTraps.
•Nahanitrapsareasourceofmajorleakages
duetotheirpoordesign,castingandpoor
quality.
02-Jul-17 Rameez R. Gazi, Dept. of Architecture 14

15. Different types of traps
Gully Trap
•Agullytrapisprovidedoutsidethebuilding
beforeconnectingittoexternalsewerage
line.
•Itpreventsthefoulgasesenteringintothe
buildingbyprovidingwaterseal.Ithas
deepwatersealofminimum50mmdepth
anditalsopreventsentryofbugsand
insectsfromsewerlinetowastewater
pipes.
02-Jul-17 Rameez R. Gazi, Dept. of Architecture 15

16. Different types of traps
Gully Trap
•The total depth of gully trap shall not be less
than 30 cm. with a minimum depth of water
seal of 50 mm.
•Each gully trap shall have one cast iron
grating 15 cm x 15 cm and it must be
embedded in cement concrete foundation
properly and housed in a brick masonry
chamber.
•Chamber must be well plastered and one
water and air tight C.I cover fixed over
frame 30 cm X 30 cm inside dimensions.
02-Jul-17 Rameez R. Gazi, Dept. of Architecture 16

17. Different types of traps
‘P’ , ‘Q’ , and ‘S’ Trap
•P, Q, and S traps are classified according to their shape.
•They essentially consist of U –Tube which retains water acting as seal
between the foul gas and atmosphere.
02-Jul-17 Rameez R. Gazi, Dept. of Architecture 17

18. Different types of traps
Intercepting Trap
•Intercepting trap is provided in to the
Interceptor Manhole (Interceptor Chamber).
•An Interceptor manhole is provided at the
intercept of building sewer and Public sewer.
•Intercepting trap is provided to prevent the
foul gases from public sewers entering in to
the building sewer by providing water seal of
100 mm.
•It has an opening at the top called the
cleaning eye/Plunge shaft having a tight plug
for cleaning the trap.
02-Jul-17 Rameez R. Gazi, Dept. of Architecture 18

19. Different types of traps
Bottle Trap
•A bottle trap is provided to receive waste from washbasin, kitchen sinks and
other appliances where the appliances do not have built-in it trap.
02-Jul-17 Rameez R. Gazi, Dept. of Architecture 19