Design a safe staircase by calculating the number of steps, riser height, and tread going for any floor height. Checks IS, UK, and US building code compliance.
Divide total rise by preferred riser height. For a 2.8m floor height with 175mm risers: 2800/175 = 16 risers. Adjust riser height to fit: 2800/16 = 175mm exactly.
The formula 2 x Riser + Tread should equal 600-650mm for a comfortable staircase. For example: 2x175 + 300 = 650mm. This ensures natural walking rhythm.
IS 456 recommends riser height of 150-190mm for residential buildings. 175mm is the most common standard. Commercial buildings use 150-165mm for easier climbing.
10 feet = 3.048m. At 175mm per riser: 3048/175 = 17.4, round to 17 risers. Actual riser = 3048/17 = 179mm. You would have 16 treads.
Minimum tread going (depth) is 250mm per IS code for residential use. 270-300mm is more comfortable for adults. Public buildings typically require 300mm minimum.
For 16 treads at 300mm each: 16 x 300 = 4,800mm (4.8m) of horizontal space. Add landing space at top and bottom. A straight staircase for a standard 2.8m floor needs roughly 4.5-5m of floor space.