For 90 bend 2 x d. If the length of the rebar is in feet and diameter is in mm then the weight of steel reinforcement W D 2 533 L. How to calculate the reinforcing bar length Along center line.
Coming back to the formula Cutting Length Clear Span of Slab 2 X Ld 2 x 042D 1d x 4 2d x 2 6000 mm 2 x 40 x 12 2 x 042 x 88 1x12x4 2x12x2 Cutting Length 6938 mm or 694 m.
Divide that result by the space to be left between longitudinal bars then add one. Item Model Unit Weight Rebar F6 kgm 0222 Rebar F8 kgm 0395 Rebar F10 kgm 06169 Rebar F12 kgm 0888 Rebar F14 kgm 121 Rebar F16 kgm 158 Rebar F18. This is needed to determine both the lengths of the rebar and how many rows and columns are needed. Coming back to the formula Cutting Length Clear Span of Slab 2 X Ld 2 x 042D 1d x 4 2d x 2 6000 mm 2 x 40 x 12 2 x 042 x 88 1x12x4 2x12x2 Cutting Length 6938 mm or 694 m.