The Estimate is the Probable quantity and cost of a work and is determined theoretically by mathematical calculation based on the drawing and current rates and a stair is a set of steps provided in a building for movement from one floor to another. “There is no elevator to success, You have to take the stairs ” ~Zig Zaglar So let’s go step by step to know how to calculate the volume of a waist slab type staircase. Step 1 First of all we will have to find No. of steps so for that we will have to Divide Height by Riser . You can see the height is 3m and the riser value is 0.15 m after dividing you will get the value of 20 nos of steps. Step 2 Now we will have to find the horizontal length , for finding it we will have to multiply the nos of steps and tread so you will get the value of 5000mm. Step 3 Next we will have to calculate the waist slab length by the help of Pythagoras theorem So the value will be 5830 mm now we will find the volume of waist slab so for that we need
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