Thumb rule to calculate the Steel quantity required for Slab, Beams, Footings & Columns:

 

For Residential buildings - 4.5kg - 4.75kg /sqft

For Commercial buildings - 5.0kg - 5.50kg/sqft

Structural Member                   Percentage of Steel 

Slab                                     1% of total volume of concrete 

Beam                                   2% of of total volume of concrete 

Column                               2.5% of total volume of concrete

 Footings                             0.8% of total volume of concrete 

Example: Thumb rule to calculate Steel quantity of above slab = Volume of Concrete x Density of Steel x % of Steel of Member 

Steel quantity required for above slab = 3 x 7850 x 0.01 = 235Kgs