Concrete quantity calculation is the first step of the process of building a concrete staircase. People need to know how much of the needed materials should they buy so the construction would go without problems. But, this is a huge mathematical process, showing the dimensions of the stairs and the way they’re gonna be build. Only this way they can calculate the need of the materials for the construction.
Concrete Quantity Calculations The images will show you the calculations on the piece of paper and the link bellow will explain it better.
Staircase quantity
R.C.C. work (staircase)
Base Toe wall
L X B X H 1.10 x 30 cm x 23 cm 1.10 x 0.30 x 0.23 = 0.076 cu. Meter
No. of Toe wall is one
Therefore, total volume of Toe wall = 0.076 x 1 = 0.076 cubic meter
Waist slab of flights
Volume = L X B X H
Length of waist slab = 
Length of waist slab = L = 3.05 meter Breadth of waist slab = 1.15 meter
Adding bearing 15 cm 1.15 cm + 1.15 cm = 1.30 meter
Thickness of waist slab is 15 cm.
Therefore, volume of waist slab = L X B X H
Volume of waist slab = 3.05 x 1.30 x 0.15
Volume of waist slab = 0.594 m3
No. of waist slab is 2
Therefore, volume of waist slab = 0.594 x 2 = 1.190 m3
Landings
Length of landing = 2.30 meter
Add 15 cm bearing both ends
i.e. = 2.30 + 15 cm + 15 cm = 2.60 meter
Breadth of landing is 1.15 cm
Add 15 cm bearing as per drawing
i.e. = 1.15 cm + 15 cm = 1.30 meter
Thickness of landing slab is 15 cm i.e. 0.15 meter
Therefore, volume of landing = L X B X C
Volume of landing = 2.60 x 1.30 x 0.15
Volume of landing = 0.507 meter
No. of landing is 2
Therefore, total volume of landing = 0.507 x 2 = 1.014 cubic meter
Steps without slanting
Length of steps without slanting
= 2.3 m / 2 (As per drawing)
= 1.15 meter
Breadth of steps without slanting
= ½ x 0.25 (Triangle formula)
= 0.125 meter
Height of step without slanting is 16 cm
i.e. 0.16 meter
therefore, volume of step without slanting = L X B X H
volume of step without slanting = 1.15 x 0.125 x 0.16
volume of step without slanting = 0.023 m3 (cubic meter)
no. of steps is 20
therefore, total volume of steps without slanting = 0.023 x 20 =0.460 m3
steps with slanting’s
length of steps with slanting’s
= 2.3 m / 2 (As per drawing)
= 1.15 meter
Breadth of step with slantings
= ½ x 0.03 ( ie. 0.28 – 0.25 = 0.03) = 0.0153 meter
Height of step with slantings is 16 cm i.e 0.16 meter
Therefore, volume of step with slanting = L X B X H
Volume of step with slanting = 1.15 x 0.0153 x 0.16
Volume of step with slanting = 0.00281
No. of steps with slanting is 20
Therefore, total volume of steps with slanting = 0.00281 x 20 = 0.055 m3
Total volume of staircase is = 0.076 + 1.190 + 1.014 + 0.460 + 0.055
Total volume of staircase is = 2.765 m3 (cubic meter)