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