Stairway headroom or overhead clearance.
Headroom clearance for stairs.
Minimum 6 8 headroom height clearance for stairway.
1910 25 b 3 stairs have uniform riser heights and tread depths between landings.
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.
Spiral stairs must meet the vertical clearance requirements in paragraph d 3 of this section.
Friday june 15 2018.
Specifications for stairway overhead clearance.
Minimum 10 inch stair tread depth with nosing or minimum 11 inches with no nosing.
Handrail graspability to be either type i or ii with a minimum 1 1 2 inch clearance from a wall.
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.
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.
Maximum 7 3 4 inch stair riser height.
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.
Stairway headroom should be 6 8 over tread or landing.
Maximum 12 3 vertical height rise for a flight of stairs.