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)


 
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