Question
Given a 1meter high staircase resting on solid concrete, could it be adequate to design nominal reinforcement for staircase?
Answer
For design of staircase, there are three key scenarios-
(i) Stairs spans longitudinally -
This type of stairs refers to stairs spanning between landings only without any side supports. In case, staircase have to be designed as a beam between two end supports and main reinforcement is provided at bottom of staircase slabs.
(ii) Stairs spanning transversely -
This sort of staircase is supported by sidewalls only and it might also be supported by stringer beams. For case of sidewalls, it acts as a cantilever beam and main reinforcement are provided the top surface of slab. For case of staircase supported sideways by both sidewall and stringer beam, it have to be designed transversely with end supports as sidewall and stringer beam and strengthening is provided at bottom of the stairway.
(iii) Stairs resting on solid support -
For stairs resting on solid wires, only nominal steel reinforcement is provided to manage thermal and reduction cracking.