Estimating, costing and specification table

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written 4.7 years ago by

Description of item	Unit of measurement	Unit of rate	Mode of measurement
Earthwork: 1. Earthwork in excavation in any type of soil	cu m	% cu m	Measurement shall be taken as per drawing. According to ISI excavation over areas not exceeding 30 cm in depth shall be considered as surface excavation and giveen in sqm.m stating the average depth. Trenches for pipes, cables etc. shall be measured in rm for different diameters.
2. Hire and labour charge for shoring walls (for protection side of trench)	sq m	sq m	Measurement shall be taken for the area in contact with and supporting the earth. The item shall include all necessary timber work including plank walling, struts, poling boards etc. For successive depths of 1.5m measurement shall be kept separately.
Brickwork: Brickwork (with lime or cement mortar) of one or more than one brick wall(or brick thick walls when length of brick is parallel to the thickness of the wall.	cu m	cu m	Thickness of brick work shall be measured in multiples of half brick. For 19cm x 9cm x 9cm modular bricks the nominal size shall be 20cm x 10cm x 10cm and the corresponding half size brick shall be 10cm. Net measurement shall be taken after deduction of all openings with lintels. For small curves or chamfer measurement on the square (i.e. without deduction for the quantity removed for for- ming the small curves or chamfers) is allowed. Rou- nd pillars or pillars of polygonal form shall be cal culated as if they were square, the dia. being taken as the side of the square. Brickworks circular on plan to a mean radius not exceeding 6m shall be mea. sured separately. But brickworks curved on plan to a mean radius exceeding 6m shall b included with the general brickwork.
Lime or cement concrete in foundation.	cu m	cu m	Measurement shall be taken on the finished works to the nearest centimetre. The kind, size, grading and proportions of materials to be used And the method of mixing shall be described in the item. Particulars of any test required of materials, mixes and of the finished work shall be stated. Different kinds of concrete shall be kept seperate. Reinforced concrete as in raft foundation shall be kept separate from unreinforced concrete.
Reinforced cement concrete (RCC excluding reinforcement and shuttering)	cu m	cu m	All measurements shall be taken to the nearest l cm except that the thickness of slabs, partitions cte. and sectional dimensions of different R.C.C members shall be taken to the nearest 0-5 cm. No deductions shall be made for (a) the volume occ upied by reinforcement, ib) the volume occupied by water pipes, conduits not exceeding 25 sq cm (c) openings upto 0-1 sq m. No extra labour for forming voids or opening shall be allowed for cases as described under groups (a). (b) and (c).
Damp proof course (DPC)	sq m	sq m	Measurement shall be taken as per drawing stat- ing the thickness. The description shall include fra- mework, finishing, levelling, curing etc. Verandah and door openings do not came into account when D.P.C. is laid on plinth Ievel
R C Chajja	r m	r m	The item shall include all frame work. The pro jection and its average thickness shall be stated. The projection shall be measured from the face of the wall to the outside edge of chajja horizonally. The running length shall be the average of the lengths measured along the wall and along the free end of chajja. The bearing on the wall shall be deemed to be included in the item
Terraced roofid portion of tiles, bricks or stone slabs	sq m	sq m	The thickness, size and quality of tiles, bricks or stone slabs shall be stated. The number of layers method of laying, pointing und the kind of mortar with proportion shall be stuted and included in the item.The supporting rafter and beams shall be mcasur ed separately under the relevant clauses. Tiles laid i chajja und sunshades shall be measured separately.
Lime terracing on roof	sq m	sq m	The proportion of mixing and average consolidate- ed thickness shall be described. If special top surface finish is desired this shall be paid separately in sq m. Insertion in parapet (i.e. gh0ondies) shall be acc ounted. Madras terrace roofing shall include top & underside plaster finish.
Renforced brick (RB) roof or slab	cu m	cu m	Measurement shall be taken as per drawing. The steel reinforcement shall be measured separately in quintal. Shuttering shall be measured separately For all other R. B. works the same unit muy be followed.
Tiled roofing (excluding supporting frame work)	sq m	sq m	Measurements shall be taken as per finished werk describing the kind, pattern, quality and size of the tiles. Single and double tiling shall cach be mea sured separately.
Plastering (to wall, floor etc) with lime or cement mortar or pointing to brickwork	sq m	sq m	Measurement (exterior or interior) shall be taken as per surfaces of walls before plastering and deduc tions for openings shall be made as follows :-(a) No deduction or addition shall be made for ends of joists, posts steps etc. and opening not exceeding 0-5 sq m. (b) For opening exceeding 0-5 sq m but not exceeding 3 sq m and when both faces are plastered with the same plaster, deduction shall be made for one face only and no additions shall he made for jambs, soffits, sills etc. (c) For openings of a rca exceeding 3 sq m deduction shall be made for the openings, but jambs, soffits and sills shall be measured.

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