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IDEX - Ch. 6
Means of Egress
35
Art/Design
Professional
05/08/2010

Additional Art/Design Flashcards

 


 

Cards

Term
Define means of egress.
Definition
Continuous and unobstructed path of vertical and horizontal egress travel from any point in a building or structure to a public way.
Term
Define exit access.
Definition
Portion of the means of egress that leads to the entrance of an exit.
Term
Define exit.
Definition

Portion of the means of egress that provides a protected path of egress between the exit access and the exit discharge.

 

(Fully enclosed and protected by fire-resistance rated construction with protected openings)

Term
Define  exit discharge.
Definition
Portion of the means of egress between the termination of exit and public way.
Term
According to the CBC, which part of the means of egress is an exterior exit stairway or ramp?
Definition
Exit.
Term
What are 3 factors that determine the 1- or 2-hour rating for an exit?
Definition

1. building height

2. construction type

3. passageway length

Term
What must be added to the number of fixed seats in a fixed seating assembly to determine the occupant load?
Definition
The occupant load of areas where fixed seating is not installed (waiting and wheelchair spaces).
Term
In the CBC, what type of space requires two exits if > 500 sq. ft. and containing hazardous materials.
Definition
Laboratory
Term
What condition will require two exits even if the occupant load is less than indicated in the CBC Table 1015.1 Spaces with One Means of Egress?
Definition

The common path of egress travel exceeds the limits given in the code:

 

a. 75 ft. for all but H-1, H-2, H-3

b. 100 ft. for B, F, S if sprinklered

Term
How many exits are required if the O.L is between 501 - 1000?
Definition
3
Term
How many exits are required if the OL > 1000?
Definition
4
Term

What is the typical egress width per occupant for a non-sprinklered building (except H and I-2)

a. for stairways

b. for other egress components?

Definition

a. 0.3 in. / occupant

b. 0.2 in. / occupant

Term

What is the typical egress width per occupant for in a sprinklered building (except H and I-2)

a. for stairways

b. for other egress components?

Definition

a. 0.2 in. / occupant

b. 0.15in. / occupant

Term
If there are multiple means of egress and one means of egress becomes blocked, what is the minimum capacity that the other means of egress must handle?
Definition
50% of the required total capacity
Term
What types of door opening mechanism are allowed for egress doors serving hazardous areas or OL >= 50?
Definition
Pivoted or side-hinged - swing in direction of travel
Term
How many inches can a fully open door project into the required width of the path of egress?
Definition
7 inches
Term
If a building is fully sprinklered, what is the minimum separation distance of exits for a space that requires two exits?
Definition

1/3 the maximum diagonal dimension

(1/2 if not sprinklered)

Term
What is the minimum clear width for an egress door (except I-2, I-3, R-1 or closets)?
Definition
32 in.
Term
What is the maximum width of swinging egress doors?
Definition
48 in.
Term
What is the minimum height of an egress door?
Definition
80 in.
Term
What is the minimum clear width of an egress door for Group I-2?
Definition
44 in.
Term
What is the minimum clear width of an egress door for Group I-3?
Definition
28 in. (unless accessible)
Term
Is glass permitted in egress doors?
Definition
Yes, but it must be wired glass or fire-resistance-rated glazing.
Term
What is the minimum and maximum size of risers for public stairs?
Definition
4 in. - 7 in.
Term
What is the minimum tread for public stairs?
Definition
11 in.
Term
What is the maximum riser for residential occupancies or private stairways with OL < 10?
Definition
7 3/4 in.
Term
What is the minimum tread for residential occupancies or private stairways with OL < 10?
Definition
10 in.
Term
What is the minimum dimension of a stairway landing in the direction of travel?
Definition
No less than the width of the stair, but need not be more than 48 in.
Term
When is an intermediate handrail required for a stairway?
Definition
For stairways wider than 5 ft. (Handrail access must be within 30 in.)
Term
The top of the handrail must be between what height above the nosing of treads?
Definition
Between 34 - 38 in.
Term
How far past the top riser must the handrail extend?
Definition
At least 12 in.
Term
How far beyond the bottom riser must the handrail extend?
Definition
At least the depth of one tread.
Term
What is the cross-sectional dimension of the gripping portion of the handrail?
Definition
Between 1 1/4 - 2 in.
Term
What is the minimum space between the handrail and the wall?
Definition
1 1/2 in.
Term
What is a common formula for determining an appropriate riser to tread ratio? 
Definition
2R + T = 25 in.
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