Steel Requirements for RCC Elements | Foundation Column beam and slab |

1. Main reinforcements

(a) At least 2 bars and not more than 6 bars in one layer.

(b) 8 or 10 mm dia. bars for slabs. For beams 12, 16, 20, 22, 25 or 36 mm bars may be used.

(c) Minimum reinforcements

pt, min =

(d) Maximum reinforcement = 4.0% of gross area.

(e) Bars less than 32 mm dia. may be bundled but bars larger than 32 mm shall not be bundled.

2. Shear reinforcement:

(a) Should go around outermost tension and compression bars.

(b) If no compression steel is used, provide two suspender bars of diameter 10 mm.

(c) Maximum spacing shall be: 0.75 d for vertical shear reinforcement, and d for inclined stirrups

at 45°. In no case it should not be more than 300 mm.

(d) Minimum reinforcement shall be such that ≥ .

(e) 6, 8, 10, 12 mm bars are used for shear reinforcement.

(f) Usually 2 legged reinforcements are provided. Sometimes to avoid too close spacing 4 or 6

legged bars are provided.

(g) If depth of beam exceeds 750 mm, side reinforcements are provided at the rate of 0.1% of web

area. Spacing shall not exceed 300 mm.