A BRIEF OF IS 1200 PART 4,5,6

A summary of various important measurement standards in IS 1200 Pertaining to Part-4,5,6

1. A BRIEF INTRODUCTION TO IS 1200 PART- 4,5,6 Prepared By: Subhendu Datta MBA in Construction Project Management

2. CONTENTS Methods of Measurement Part 4- Stone Masonry Part 5- Formwork Part 6- Refractory Works Summary References

3. METHODS OF MEASUREMENT 0.01 m 0.01 m 2 0.01 m 3 0.001 tonne Nos.

4. METHOD OF MEASUREMENT OF BUILDING & CIVIL ENGINEERING WORKS PART IV- STONE MASONARY

5. GENERAL SCOPE Clubbing of Items - Items may be clubbed together provided that break-up of clubbed items is on the basis of detailed descriptions of items as stated in this standard. Booking of Dimensions - Order shall be consistent and generally in the sequence of length, breadth or width and height or depth or thickness. Measurements - All work shall be measured net in the decimal system, below as fixed in its place, unless otherwise stated herein, as given a) Dimensions shall be measured to the nearest 0.01 m. b) Areas shall be worked out to the nearest 0.01 m 2 , and c) Cubic contents shall be worked out to the nearest 0.01 m 3 . Description of Item - Description of each item shall, unless otherwise stated, be held to include, conveyance, delivery, handling, unloading , storing, waste, returning of packing, scaffolding, tools and tackle , as necessary.

6. Waste - All measurements of cutting is waste ( Unless Stated) Deduction - Where minimum area is defined for deduction of an opening , void, or both, such area shall refer only to opening or void within the space measured. Work to be Measured Separately - Work executed in the following conditions shall be measured separately: a) Work in or under water, b) Work in liquid mud, c) Work in or under foul positions, d) Work interrupted by tides, and e) Work in snow . Bills of Quantities - Items of work shall fully describe materials. and workmanship, and accurately represent the work to be executed. Measurement in Stages - Work shall be measured in the following categories in convenient stages stating height or depth: a) Below ground/datum line, and b) Above ground/datum line.

7. RULES FOR MEASUREMENT No deduction is made for following: (1) Opening each up to 0.1 m 2 (2 ) Ends of beams , post, rafters, etc. up to 500 sq.cm or 0.05 sq.m in section. (3) Bed plate, wall plate, bearing of balcony ( chajja ) and the like up to 10 cm depth. bearing of floor and roof slabs are not deducted from masonry . (4) Cement concrete blocks for holdfasts, holding-down bolts and the like (5) Iron fixtures such as wall ties, pipes up to 300 mm dia. and holdfasts of doors and windows. For other openings deduction are made in following manner: Deductions for Rectangular Opening: Deductions = L x H x thickness of wall

8. METHOD OF MEASUREMENT OF BUILDING & CIVIL ENGINEERING WORKS PART V- FORMWORK

9. DESCRIPTION OF FORMWORK The formwork shall include the following: Splayed edges, notching, allowance for overlaps and passing's at angles , sheathing battens, strutting, bolting, nailing, wedging, easing , striking and removal All supports, struts, braces, wedges as well as mud sills, piles or other suitable arrangements to support the formwork Bolts, wire ties, clamps, spreaders, nails or any other items to hold the sheathing together; Working scaffolds, ladder, gangways , and similar items; Filleting to form stop-chamfered edges or splayed external angles not exceeding 20 mm wide to beams, columns and the like; If required, temporary openings in the forms for pouring concrete , inserting vibrators , and cleaning holes for removing rubbish from the interior of the sheathing before pouring concrete ; .

10. CLASSIFICATION Formwork shall be generally classified as follows and measured separately , unless specified otherwise: Foundation , footings, bases of columns and mass concrete; Flat surfaces Soffits and roof landings Vertical surfaces Walls, partitions including attached pilasters, buttresses, plinth and string courses Sloping or battering surfaces, including folded plates; Inclination to horizontal plane does not exceed 30 ” ( shuttering only on the underside ); Inclination to horizontal plane exceeds 30” (shuttering may be provided both on underside and upper side) Arches i) up to 6 m span ii) above 6 m span Cylindrical Shells i ) radius less than 3 m ii) radius above 3 m

11. Wafle or ribbed slabs Dormer vaults and shell roofs having curved surface area in both directions. Sides of soffits of beams, beam haunching , cantilever, girders, beams and girders 1m deep to be measured separately Sides of piers, columns, pillars, posts and stanchions and struts to be measured separately Slabs, breaks in walls and floors to be measured in running meter Cronices and moulding Chullah hoods, weather shades, chhajas etc including edges. Sloping or stepped soffits of staircases, inluding risers and stringers, excluding landing. Spiaral Staircase; Chimney and Shafts; Elevated water resevoirs ; Well steining and fins.

12. METHOD FOR MEASUREMENT To be measured in square meter as actual surface in contact with concrete. To be lined with wallboard, hardboard, polyethylene sheet. No deductions to be made for openings up to 0.4m 2 . No deduction shall be made for any opening/cutouts when slip form technique is used . Ranking or circular cutting, rounded or moulded edges to be measured in running metre. In main beams measurements to be made up to the sides without any deduction in the intersection of the secondary beam. Formwork to beam shall be measured up to sides of column , but no deduction shall be made from the formwork of column.

13. METHOD OF MEASUREMENT OF BUILDING & CIVIL ENGINEERING WORKS PART VI- REFRACTORY WORK

14. METHOD OF MEASUREMENT The items of work wherever necessary and unless otherwise stated shall be deemed to include the following: Dressing of the brick/blocks including cutting, grinding and chipping to achieve proper thickness of joint and alignment Dressing of bricks/blocks including cutting, grinding and chipping wherever necessary for expansion joints, sliding joints, binding joints, etc, Forming of expansion joints, sliding joints, etc Finishing, pointing, clearing and cleaning of masonry joints , gaps, hollows, cavities, opening passages, ducts etc.

15. METHOD OF MEASUREMENT The refractory and insulation bricks and blocks, types of mortars and powders to be used shall be fully described. Other auxiliary and filling materials , such as paper, cardboard, asbestos materials, mineral wool, water glass , coke pitch, carbon mass, special sands, crumbs, powders, admixtures and plasticizers required to be incorporated All refractory work measured in cubic metres. The measurement shall be inclusive of mortar joints, expansion joints and sliding joints. Deductions for voids, openings, etc, shall be made only when the area of each such opening and voids exceeds 0.1 square metre.

16. UNITS OF MEASUREMENT ITEM OF WORK UNITS OF MEASUREMENT Where the brick/blocks lining is separated from the shell or wall surface by the use of asbestos, cardboard, etc. Square metres Insulation plaster is applied over the refractory surface Square metres Refractory grout work (Theoretical Volume) Cubic metres Filling of expansion joints , sliding joints with paper, cardboard , etc. Running square metres

17. SUMMARY IS 1200 presents the following main information for each item of work: General Scope Description of Item Method of Measurement Measurement done in terms of Area, Length, Volume, Weight & Piece In stone masonry, No deductions for openings up to 0.1 m 2 In formwork, No deductions to be made for openings up to 0.4m 2 For Refractory work, Deductions for voids, openings, etc , shall be made only when the area exceeds 0.1m 2

18. EXERCISE CALCULATE QUANTITY OF FORMWORK REQUIRED? FORMWORK required only on Vertical Surface. Total Area: = Perimeter of footing x Ht. = [2 x (3 + 2)]x 0.6 = 6 m 2

19. REFERENCES The Constructor, http :// theconstructor.org/construction/measurement-of-masonry-works-in-construction BIS, IS 1200 Part 4 , 5 , 6 M. Chakraborti , Estimating, Costing, Specification & Valuation in Civil Engineering

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