Stairway headroom should be 6 8 over tread or landing.
Headroom clearance for stairs.
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.
Specifications for stairway overhead clearance.
Spiral stairs must meet the vertical clearance requirements in paragraph d 3 of this section.
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.
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.
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 6 8 headroom height clearance for stairway.
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.
Maximum 7 3 4 inch stair riser height.
Maximum 12 3 vertical height rise for a flight of stairs.
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.
Friday june 15 2018.
Minimum 10 inch stair tread depth with nosing or minimum 11 inches with no nosing.