Doors, Stairs, and Hallways Flashcards
If the egress door does not swing over the exterior landing, how far below the threshold can the landing be?
7 3/4 inches.
Can a doorway interrupt the stairwell’s continuity.
Yes.
The width of the landing should not be less than the width of what?
The door.
What depth should every landing measure in the direction of travel?
At least 36-inches.
The required width of a hallway is?
At least 36”.
What is the minimum tread depth on a regular stair?
10-inches.
What width should a stairway measure above the handrail?
36-inches
The minimum concentrated load on a 4 square inch area stair tread is ?
300 pounds
If the non-egress door swings in, and there’s no more than two risers, there’s no need for what?
An outside landing
What is the minimum tread depth of a winder stair measured at any point?
6 inches
What is the maximum riser height for a winder stair?
7 3/4 inches
What diameter handrail does a Spiral staircase require?
1 1/4 to 2 inches
A handrail on one side is needed if you have this many risers?
4 or more
A handrail should allow the user to maintain a consistently secure grip without doing this?
Twisting the fingers or letting go
If there’s only one handrail, the minimum clearance at and below the rail is?
31 and 1/2 inches
If there’s a handrail on both sides of the stairs, what should the clearance at and below the rail be?
27 inches
How many inches can stringer trim boards project into the stairway width?
No more than 4 and 1/2 inches
A stairway should not have a vertical rise larger than ______ between floor levels or landings.
12-feet
Unless the lights are continuously illuminated or automatically controlled, lights switches are required with how many risers?
6 risers or more
What height should the headroom in all parts of a stairway be?
Not less 6 feet 8 inches.
What tread depth does not require a nosing?
11 inches or more
What is the minimum riser height?
4 inches
What is the maximum riser height of a regular stair?
7 and 3/4 inches
On stairways with a tread depth less than 11 inches and with solid risers, what size nosing should there be?
3 /4 inches and not more than 11/4 inches.
Stairways should be at least 36 inches wide measures above the _______.
Handrails
The walking surface of the stairway treads and landings should not be sloped more than________.
1:48 or 1/4:12
Where should the light be if the exterior stairs go from ground level down to a basement?
At the bottom of the stairway.
What’s the greatest riser height difference allowed within any flight of stairs?
3/8 of an inch.
Enclosed accessible space under stairs should be protected on the enclosed side with what?
1/2-inch gypsum board.
The width of the landing cannot be less than the width of the what?
Stairway.
What is the minimum winder tread depth measured at a 12-inch walk line from the narrowest point?
10-inch
The tread depth of all spiral stairs must be?
Identical
The minimum height of a horizontal guard should be?
36 inches.
A 36 inch guard should be on the open side of stairs it the rise is what?
30-inches or above.
