Use the narrow part of the square for clamping the riser gauge and the wider part for the 10 1 4 in.
Building open riser stairs.
Exceptions for private steps and stairways serving an occupant load of less than 10 and stairways to unoccupied roofs may have a maximum rise of 8 inches and a minimum run of 9 inches.
Maximum 7 3 4 inch stair riser height.
Lay out the stairs by drawing on the outside of the square sliding the square along until it meets the last mark to learn how to build steps.
Clamp the stair gauges to the carpenter s square.
Locate staircases in a prominent position and visible from the building entry and lift waiting areas.
Private stairways serving an occupant load of less than 10 and stairways to unoccupied roofs may be constructed with an 8 inch maximum rise and a 9 inch minimum run.
The greatest riser height within any flight of stairs shall not exceed the smallest by more than 3 8 inch.
Draw attention to a staircase by using higher levels of local lighting.
Handrail graspability to be either type i or ii with a minimum 1 1 2 inch clearance from a wall.
Minimum 10 inch stair tread depth with nosing or minimum 11 inches with no nosing.
Maximum 12 3 vertical height rise for a flight of stairs.
Lay out the stairs.
Handrail height to be placed a minimum 34 inches to 38 inches.
Ubc standards for stairs cover many aspects of stair and handrail design and installation including those required by the americans with disabilities act of 1990 and subsequent revisions of the ubc.
Use different floor finishes to lead to the staircase.