Estimating Sheet

# Doglegged Staircase – Bar Bending Schedule

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In this construction video tutorial you will learn to estimate the bar bending schedule of doglegged staircase. Before starting the calculation, you should have clear ideas on the fundamentals of bar bending schedule as well as constituents of staircase.

What is Dog legged Stair Case?

Dog legged stair case refers to the most inexpensive staircase. This type of staircase is mostly found that is set with two adjoining flights operating parallel by a mid landing. Where space is less, The purpose of setting up dog legged staircase is to use existing space reasonably. Under this type of staircase landing is arranged in line with the level at which the direction of the flight alters.

Constituents of Staircase:-

Waist slab: Waist slab stands for the slab of the stair that is slanting from the floor slab to the landing slab.
Flight: Flight means the series of steps among floor and landing.
Landing : Landing refers to the level of floor among flight.
Step: The step comprises of Riser and tread.

Riser: The riser means the vertical(up and down) portion among each tread in the stairway.

Constituents & Reinforcement Details of Staircase are assumed as follow :-

Height of each floor = 3.0 m
Height of mid landing (flight) = 1.5 m
Width of landing = 2.5 m
Width of waist slab = 1.2 m
Length of waist slab = 3.0 m (straight)

To determine the actual length of waist slab, Pythagorean theorem is used. From the Pythagorean Theorem, we find that in any right triangle, the sum of the squares of the lengths of the triangle's legs is similar to the square of the length of the triangle's hypotenuse.

To learn the detail calculation process, go through the following construction article civilread.com