Reinforcement is required for reinforced concrete members such as footings, beams, columns, slabs, lintels etc. Estimation of reinforcement quantity is required prior to tendering stage to calculate approximate cost of project or construction work.

Following table gives the estimated quantities of reinforcement and its size generally used for various building works:

Steel reinforcement for RCC members

Sl. No

RCC Member

Quantity in kg/m3

Size of reinforcement required

1

Column footings

75

10mm  or 12mm

2

Grade beams

100

12mm, 16mm – 85%

Stirrups – 6mm or 8mm– 15%

3

Plinth beams

125

8mm diameter – 85%,

Stirrups 6mm – 15%

4

Columns

225

16mm, 20mm and 25mm – 90%

Ties – 6mm or 8mm – 10%

5

Lintel beam

125

12mm, 16mm dia – 85%

Stirrups – 6 mm or 8mm – 15%

6

Sunshades

60

8mm dia – 75%

Distributer – 6mm – 25%

7

Canopy slab upto 2.0 m span

125

10mm dia – 80%

Distributor bars – 6mm or 8mm – 20%

8

Staircase waist slab

150

12 or 16mm dia – 80%

Distributor 8mm dia – 15%

9

Roof slab

 

 

 

(a)  One way slab

80

8mm dia – 70%

Distributor – 6mm – 30%

 

(b)  Two way slab

100

8mm dia – 100%

 

(c)  Square slab – 4m to 6m size

150

10 – 12mm dia – 100%

10

Main beams above 6m

250

20mm, 16mm, 12mm – 80 – 85%

Stirrups – 8mm – 15 – 20%

 

All above mentioned steel are round tapered steel. This data is just for estimation of quantity of steel for various RCC works. This does not provide actual steel required for all the members. Actual quantity of steel required can be calculated from the drawings prepared after structural design.

1. Read more posts on Reinforcement Guide

2. Read More posts on Material Estimation Guide