# How to calculate the volume of concrete in stair

In this video you can learn how to calculate volume of concrete in stair case

#### Parts of Staircase

A Stair case provide path between two floors
Two parts of staircase:- 1. Step 2. Landing.
Step a triangular part of staircase that have two part Riser and Tread.
Riser is a vertical part of step, Tread is a horizontal part.
Landing is a part between slab and flight.
Flight of a staircase has normally two types one is above landing and one is below landing.

#### How to calculate volume of concrete in staircase

Step-1:- Calculate the number of steps in Stair
Number of Stair = H/R , H =height of stair, R=rise of Stair
Step-2:- Then calculate Horizontal length of stair
Horizontal length of stair= Tread X Number of steps.
Steps-3:- Now Calculate waist length
using Pythagoras theorem and calculate waist length
Step-4:- First of all Calculate Waist volume = BxLxD
Step-5:-then Calculate steps volume = area of step X B

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