Calculation of Stair Concrete

 Calculation of Stair Concrete

Waist & Landing slab = 6" thick

Tread = 12"

Riser = 6"

Width of Stairs = 4.5 ft

Length of waist slab = √ (16)²+ (8)²

                                         = 17.89 ft

VOLUME OF WAIST SLAB = 17.89×0.5×4.5

                                                  = 40.25 Cft

Volume of Landing = 5 × 4.5 × 0.50

                                     = 11.25 Cft

Volume of Steps = 16 × (1/2×1.0×0.50)×4.50

                                = 18 cft

Total Volume=40.25 + 11.25 +18

                       =69.50 Cft

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