Divide 145 pounds per cubic feet by the depth of the concrete slab. This is the pounds per square foot for the concrete. The recipe used to make concrete can vary significantly. A density of 145 pounds per cubic foot is a reasonable approximation for any commonly used concrete recipe. Reinforced concrete has steel bars called rebar inserted into it.
Jun 09, 2017· If we put 1 meter length for each diameter of steel bar in the formula then we will get the unit weight. 10mm ø bar = 10² x 1/162 = kg/m; 12mm ø bar = 12² x 1/162 = kg/m; 16mm ø bar = 16² x 1/162 = kg/m; 20mm ø bar = 20² x 1/162 = kg/m; If we multiply the length of bars with this unit weight we will get the total weight of steel bars. For example, total weight of 1000 meter long .