Reinforcement for Reinforced Cement Concrete

• It is usual practice to express the steel required for reinforced cement concrete as percentage of volume of concrete e.g. 1% steel in R.C.C. slab indicates that the quantity of steel required will be equal to 1% of the volume of concrete i.e. for every one square metre sectional area of the slab cut, there will be 0.01 sq.m of steel bar utilized.
• As the steel weighs 7850 kg per cubic metre, the 1% steel reinforcement means there will be 78 kg of steel per  cubic metre of volume of concrete.
• The values of usual percentage of steel assumed for various items will be as shown below:
• The quintal of binding wire for reinforced steel is usually assumed as 1 to 1.3 kg per quintal of steel reinforcement.
• Due allowance is to be made for wastage of steel which is 5 to 10%

• Computations of Quantities of Materials Required for Various Items of Works