Maximum 7 3 4 inch stair riser height.
Headroom clearance for stairs.
Handrail graspability to be either type i or ii with a minimum 1 1 2 inch clearance from a wall.
Vertical clearance above any stair tread to any overhead obstruction is at least 6 feet 8 inches 203 cm as measured from the leading edge of the tread.
Stairway headroom should be 6 8 over tread or landing.
Stairway headroom should be greater than or equal to six feet eight inches between the stair tread upper surface measured at the tread outer edge and the ceiling above.
Friday june 15 2018.
1910 25 b 3 stairs have uniform riser heights and tread depths between landings.
Minimum 6 8 headroom height clearance for stairway.
1 for a room with a sloped ceiling at least half of the ceiling must be a minimum of 7 feet or higher with no part of the required floor area lower than 5 feet.
Stairway headroom or overhead clearance.
Because the toilet fits in at the low side of the sloped ceiling under the stairs the vertical clearance in front of it is the primary issue.
Specifications for stairway overhead clearance.
Maximum 12 3 vertical height rise for a flight of stairs.
Here are the parameters you have to work within based on the residential edition of the florida building code fbc r305 and the international residential code irc.
Spiral stairs must meet the vertical clearance requirements in paragraph d 3 of this section.