# Doors, Stairs, and Hallways Flashcards

1
Q

If the egress door does not swing over the exterior landing, how far below the threshold can the landing be?

A

7 3/4 inches.

2
Q

Can a doorway interrupt the stairwell’s continuity.

A

Yes.

3
Q

The width of the landing should not be less than the width of what?

A

The door.

4
Q

What depth should every landing measure in the direction of travel?

A

At least 36-inches.

5
Q

The required width of a hallway is?

A

At least 36”.

6
Q

What is the minimum tread depth on a regular stair?

A

10-inches.

7
Q

What width should a stairway measure above the handrail?

A

36-inches

8
Q

The minimum concentrated load on a 4 square inch area stair tread is ?

A

300 pounds

9
Q

If the non-egress door swings in, and there’s no more than two risers, there’s no need for what?

A

An outside landing

10
Q

What is the minimum tread depth of a winder stair measured at any point?

A

6 inches

11
Q

What is the maximum riser height for a winder stair?

A

7 3/4 inches

12
Q

What diameter handrail does a Spiral staircase require?

A

1 1/4 to 2 inches

13
Q

A handrail on one side is needed if you have this many risers?

A

4 or more

14
Q

A handrail should allow the user to maintain a consistently secure grip without doing this?

A

Twisting the fingers or letting go

15
Q

If there’s only one handrail, the minimum clearance at and below the rail is?

A

31 and 1/2 inches

16
Q

If there’s a handrail on both sides of the stairs, what should the clearance at and below the rail be?

A

27 inches

17
Q

How many inches can stringer trim boards project into the stairway width?

A

No more than 4 and 1/2 inches

18
Q

A stairway should not have a vertical rise larger than ______ between floor levels or landings.

A

12-feet

19
Q

Unless the lights are continuously illuminated or automatically controlled, lights switches are required with how many risers?

A

6 risers or more

20
Q

What height should the headroom in all parts of a stairway be?

A

Not less 6 feet 8 inches.

21
Q

What tread depth does not require a nosing?

A

11 inches or more

22
Q

What is the minimum riser height?

A

4 inches

23
Q

What is the maximum riser height of a regular stair?

A

7 and 3/4 inches

24
Q

On stairways with a tread depth less than 11 inches and with solid risers, what size nosing should there be?

A

3 /4 inches and not more than 11/4 inches.

25
Q

Stairways should be at least 36 inches wide measures above the _______.

A

Handrails

26
Q

The walking surface of the stairway treads and landings should not be sloped more than________.

A

1:48 or 1/4:12

27
Q

Where should the light be if the exterior stairs go from ground level down to a basement?

A

At the bottom of the stairway.

28
Q

What’s the greatest riser height difference allowed within any flight of stairs?

A

3/8 of an inch.

29
Q

Enclosed accessible space under stairs should be protected on the enclosed side with what?

A

1/2-inch gypsum board.

30
Q

The width of the landing cannot be less than the width of the what?

A

Stairway.

31
Q

What is the minimum winder tread depth measured at a 12-inch walk line from the narrowest point?

A

10-inch

32
Q

The tread depth of all spiral stairs must be?

A

Identical

33
Q

The minimum height of a horizontal guard should be?

A

36 inches.

34
Q

A 36 inch guard should be on the open side of stairs it the rise is what?

A

30-inches or above.