8 Means of Egress

In general the required minimum width of exits is determined by multiplying the occupant load by a factor of ____ for stairways and ____ for egress components other than stairways

.3, .2

How many exits are required when the occupant load is 20 or less?

1

In buildings less than four stories high interior exit stairways must be __________ hr rated construction required.

1 hr

Exits are full enclosed and protected from all other interior spaces by fire resistance construction with protected openings. Depending on building height, construction type and passageway length, exits must have either a ___ or ___ hour rating.

1 or 2

When two exits are required they must be placed a distance apart equal to not less than ____the length of the maximum overall diagonal dimension of the building or area to be served, as measured in a straight line between the exits.

1/2. the reason for this is so that a fire or other emergency would not block both exits. If the building is fully sprinkled it may be 1/3

The tread may be no less than ____"

11"

What is the occupant load for a 3700 sqft office that also has two training classrooms of 1200 sqft each? Considered a "Business area" which has an occupant load factor of 100 gross. Classrooms have an occupant load factor of 20 net.

157 occupants.

What is the occupant load for a restaurant dining room that is 2500 sqft in area? Considered an "assembly without fixed seats, unconcentrated" which has an occupant load factor of 15 net.

167 Occupants. occupant load= x/ 15 sqft (per person) = 2500 sqft/15 sqft = 166.67

How many exits are required when the occupant load is between 20 and 500?

2

In buildings four or more stories high, interior exit stairways must be enclosed with ___________________ hr rated walls.

2 hr

The minimum clear opening height is ______" and the width is ________" for emergency escape windows.

24", 20"

How many exits are required when the occupant load is between 501 and 1000?

3

A handrail must be between _______" above the nosing of the treads. And extend not less than _____" beyond the top riser and not less than the depth of one tread beyond the bottom riser.

34-38", 12"

Stair serving an occupant load of 49 or less must not be less than ______" wide. Handrails may project into the required width _______" on each side.

36", 4-1/2"

The risers on a stair cannot be less than ______"

4"

Landings must be provided at the top and bottom of every stairway, the minimum dimension in the direction of travel must not be less than the width of the stair, but do not need to exceed _____"

48"

Stairways wider than _____ft must have intermediate handrails.

5'

Basements and bedrooms must have an escape window with a minimum openable area of ______ with the windowsill no more than _______ " above the floor.

5.7sqft, 44"

The risers on a stair cannot be more than _____"

7"

For residential occupancies and private stairways an occupant load less than 10 the maximum riser may be _____" and the minimum tread may be _____"

7-3/4", 10"

Stair

A change in elevation, consisting of one or more risers

Egress Court

A court or yard (considered part of an exit discharge) that provides access to a public way for one or more required exits

Exit Access Doorway

A door or access point along the path of egress travel from an occupied room, area, or space where the path of egress enters an intervening room, corridor, unenclosed exit access stair or unenclosed exit access ramp

Exit Enclosure

A fully enclosed portion of an exit that is only used as a means of egress and provides for a protected path of egress either in a vertical or horizontal direction. In most instances, however, exit enclosures mean protected stairways. Depending on construction and building type, an exit enclosure must have either a 1-hour or 2-hour rating, and all openings must be protected. An exit enclosure must lead to an exit discharge or public way.

Exit Passageway

A horizontal, fully enclosed portion of an exit that is only used as a means of egress. An exit passageway leads from an exit doorway to an exit discharge or public way. A common example of an exit passageway is an exit from the door at the ground level of an interior stairway that leads through the building to an outside door.

Area of Refuge

An area where people unable to use stairways can remain temporarily while waiting for assistance

Exit Access Stairway

An interior stairway that is not a required interior exit stairway.

Public way

Any street, alley, or similar parcel of land essentially unobstructed from the ground to the sky that is permanently appropriated to the public for public use and has a clear width of not less than 10ft.

Occupancy Group A

Assembly

Occupancy Group B

Business

Occupancy Group F

Factory and Industrial

Name two exit components that meets one or more means of egress requirements

Interior exit stairway and interior exit ramp

Name three factors that determine the number of exits?

Occupant load and occupancy of a space, the limitations on the common path of egress travel, and specific requirements when large occupant loads are encountered.

Stairway

One or more flights of stairs either exterior or interior with the necessary landings and platforms connecting them, to form a continuous and uninterrupted passage from one level to another

Winding, curved, and spiral stairways may be used as exits as exits in group _____ occupancies and in private stairways in group _____ only if they meet certain design conditions as specified in the code.

R-3, R-1

Exit Access

That portion of a means of egress that leads to the entrance of an exit

what is the AHJ

The Authority Having Jurisdiction, the people who contractors file the permit applications, construction documents, permit fee.

Travel Distance

The measurement of the distance between the most remote occupiable point of an area or room to the entrance of the nearest exit that serves it. It is part of the exit access and is measured in a straight line along the path of exit travel.

Common Path of Egress Travel

The portion of an exit access that the occupants are required to traverse before two separate and distinct paths of egress travel to two exits become available

True or False. Most codes allow a room to have one exit through an adjoining or intervening room or space, but not through kitchens, storerooms, restrooms, closets, or spaces used for similar purposes

True

Means of Egress

a continuous and unobstructed path of vertical and horizontal exiting from a building to a public way.

Corridor

an enclosed exit access component that defines and provides a path of egress travel to an exit. A corridor may or may not be protected depending on the particular requirements of the code.

Horizontal Exit

and exit through a minimum 2 hour rated wall that divides a building into two or more separate exit access areas to afford safety from fire and smoke

How many exits are required when the occupant load is greater than 1000?

at least 4

When the final inspection has been successfully completed, a _______________ is issued. This document allows the client to occupy the space.

certificate of occupancy (CO)

The interior designer is responsible for making sure the project design complies with all applicable codes and regulations. Compliance must be reflected in the ______________.

construction documents

The formal permitting process begins after the interior designer has completed the drawings and specifications. The ___________________ is responsible for submitting the documents to the local building department.

contractor

Occupancy Group E

educational

Occupancy Group H

hazardous

Net Floor Area

includes just the space actually used.

Occupancy Group I

institutional

Occupancy Group M

mercantile

Occupancy Group R

residential

Occupancy Group S

storage

Occupant Load Factor

the amount of floor area presumed to be occupied by one person

Occupant Load

the number of people that a building code assumes will occupy a given building or portion of a building.

Exit Discharge

the portion of the egress system between the termination of an exit and a public way. ex exterior exit balconies, exterior exit stairways

Gross Floor Area (GFA)

the total floor space within the perimeter of the permanent external building walls includes stairs, corridors, toilet rooms, mechanical rooms, closets, and interior partition thicknesses

True or false. The building permit must be displayed at the job site

true

true or false. Handrails must be provided on both sides of the stair.

true

true or false. only one exit is required from the basement or second story of a house.

true

There are ten exceptions to not requiring enclosed exit stairways. One example is.....In all occupancies other than I-2 and I-3, exit access stairways that only serve _______ stories are not required to be enclosed.

two

Occupancy Group U

utility