Chapter 4 ID 234 Building Codes Fall 2011 Means of Egress

Key terms Building core Building core Common path of travel Common path of travel Corridor Corridor Means of egress Means of egress Means of escape Means of escape Natural path of travel Natural path of travel Occupant load Occupant load Passageway Passageway Stairway Stairway Story Story Tenant Tenant

Elements of the egress system Exit Access – anything (occupied room, space, doorway, aisle, corridor, stair, or ramp) on the way to the exit. (doors, ramps, stairs, corridors, other rooms) Exit Access – anything (occupied room, space, doorway, aisle, corridor, stair, or ramp) on the way to the exit. (doors, ramps, stairs, corridors, other rooms) Exit – any protected, fully enclosed & rated space between the exit access and the exit discharge (exterior exit doors, enclosed exit stairway, horizontal exits, exit passageways) Exit – any protected, fully enclosed & rated space between the exit access and the exit discharge (exterior exit doors, enclosed exit stairway, horizontal exits, exit passageways) Exit discharge – any portion of a means of egress between the termination of the exit and the public way Exit discharge – any portion of a means of egress between the termination of the exit and the public way Public way – 10’w x 10’h Public way – 10’w x 10’h Area of refuge – temporary holding space for an emergency evacuation Area of refuge – temporary holding space for an emergency evacuation

Horizontal Exits

Exit passageways

Exit Access travel distance Choose the most remote part of plan to the furthest exit

Maximum number of occupants These apply only when there are less than 500 occupants…

Class Exercise: Building #1: Building #1: Single story, mixed use Single story, mixed use Café: 35’ x 50’ Café: 35’ x 50’ Office: 50’ x 75’ Office: 50’ x 75’ Building #2: Building #2: Multi-story, mixed use Multi-story, mixed use Floor 1: Grocery Store: 300’ x 250’ Floor 1: Grocery Store: 300’ x 250’ Floor 2: Clothing Boutique : 250’ x 100 & Office: 250’ x 150’, and hair salon: 250’ x 50’ Floor 2: Clothing Boutique : 250’ x 100 & Office: 250’ x 150’, and hair salon: 250’ x 50’ Floor 3: Residential apartments: 300’ x 250’ Floor 3: Residential apartments: 300’ x 250’ Occupancy Classification Occupant Load Number of Exits per Floor & per Building (don’t worry about length of travel yet)