The units of measurements for civil engineering works are mainly categorised for their nature, shape and size and for making payments to the contractor. The principle of units of measurements normally consists the following:

units of measurement

a) Single units work like doors, windows, trusses etc., are expressed in numbers.

b) Works consists linear measurements involve length like cornice, fencing, hand rail, bands of specified width etc., are expressed in running metres (RM)

c) Works consists areal surface measurements involve area like plastering, white washing, partitions of specified thickness etc., and are expressed in square meters (m2)

d) Works consists cubical contents which involve volume like earth work, cement concrete, Masonry etc are expressed in Cubic metres.

Table below shows units of measurement of various items of civil engineering works based on IS 1200.

Sl. No.

Particulars of item

Units of measurement

Units of payment

1

Earthwork

 

 

 

1.       Earthwork in excavation

CUM

Per CUM

 

2.       Earthwork in filling in foundation trenches

CUM

Per CUM

 

3.       Earth work in filling in plinth

CUM

Per CUM

2

Concrete

 

1.       Lime concrete in foundation

 

 

 

2.       Cement concrete in lintels

 

 

 

3.       RCC in slab

 

 

 

4.       Cement concrete or RCC in chujja, sunshade

 

 

 

5.       Lean concrete in roof terracing (thickness specified)

SQM

Per SQM

 

6.       Cement concrete bed

CUM

Per CUM

 

7.       Reinforced concrete sunshade (specified width and height)

CUM

Per CUM

3

Damp proof course (DPC) – thickness mentioned

SQM

Per SQM

4

Brick work

 

 

 

1.       Brickwork in foundation

CUM

Per CUM

 

2.       Brickwork in plinth

 

 

 

3.       Brickwork in super structure

 

 

 

4.       Thin partition walls

SQM

Per SQM

 

5.       Brickwork in arches

CUM

Per SQM

 

6.       Reinforced brickwork

CUM

Per CUM

5

Stone work

 

 

 

1.       Stone masonry

CUM

Per CUM

6

Wood work

 

 

 

1.       Doors and windows frames or chaukhats, rafters, beams

CUM

Per CUM

 

2.       Shutters of doors and windows (thickness specified)

SQM

Per SQM

 

3.       Doors and windows fittings (like hinges, tower bolts, sliding bolts, handles)

Earch

Per Each

7

Steel work

 

 

 

1.       Steel reinforcement bars etc in RCC and reinforced brick work

Quintal

Per Quintal

 

2.       Bending, binding of steel reinforcement

Quintal

Per quintal

 

3.       Rivets, bolts and nuts, anchor bolts, lewis bolts, holding down bolts

Quintal

Per quintal

 

4.       Iron hold fasts

 

 

 

5.       Iron railing (height and types specified)

 

 

 

6.       Iron grills

SQM

Per SQM

8

Roofing

 

 

 

1.       RCC and RB slab roof (excluding steel)

CUM

Per CUM

 

2.       Lean concrete roof over and inclusive of tiles or brick or stone slab etc (thickness specified)

SQM

Per SQM

 

3.       Centering and shuttering formwork

SQM

Per SQM

 

4.       AC sheet roofing

SQM

Per SQM

9

Plastering, points and finishing

 

 

 

1.       Plastering – cement or lime mortar (thickness and proportion specified)

SQM

Per SQM

 

2.       Pointing

SQM

Per SQM

 

3.       White washing, colour washing, cement washing, (number of coats specified)

SQM

Per SQM

 

4.       Distempering (number of coats specified)

SQM

Per SQM

 

5.       Painting, varnishing (number of coats specified)

SQM

Per SQM

10

Flooring

 

 

 

1.       25mm cement concrete over 75mm lime concrete floor (including lean concrete)

SQM

Per SQM

 

2.       25mm or 40mm cement concrete floor

SQM

Per SQM

 

3.       Doors and window sills (CC or cement mortar plain)

SQM

Per SQM

11

Rain water pipe / plain pipe

RM

Per RM

12

Steel wooden truss

Each

Per each

13

Glass panels (supply)

SQM

Per SQM

14

Fixing of glass panels or cleaning

Each

Per Each

 

Note:

  • SQM = Square meter
  • CUM = Cubic meter
  • RM = Running meter

Methods for Measurement of civil engineering works:

The rules for measurement of each item are invariably described in IS – 1200. However some of the general rules are listed below:

1. Measurement shall be made for finished item of work and description of each item shall include materials, transport, labour, fabrication tools and plant and all types of overheads for finished the work in required shape, size and specification.

2. In booking, the order shall be in sequence of length, breadth and height or thickness.

3. All works shall be measured subject to the following tolerances.

  • Linear measurement shall be measured to the nearest 0.01m.
  • Areas shall be measured to the nearest 0.01 SQM
  • Cubic contents shall be worked out to the nearest 0.01 cum.

4. Same type of work under different conditions and nature shall be measured separately under separate items.

5. The bill of quantities shall fully describe the materials, proportions, workmanships and accurately represent the work to be executed.

6. In case of masonry (stone or brick) or structural concrete, the categories shall be measured separately and the heights shall be described as:

  • From foundation to plinth level
  • From plinth to first floor level
  • From first floor to second floor level and so on.

Read More: Units of Measurement and Payments for Civil Works