MEANS OF EGRESSGETTING OUT OF THE
BUILDING
THREE MAIN CATEGORIES
• EXIT ACCESS– ANY SPACE OCCUPIED OR TRAVELED ON THE WAY TO THE EXIT
• EXIT – BETWEEN THE EXIT ACCESS AND THE EXIT DISCHARGE
• EXIT DISCHARGE– BETWEEN THE EXIT AND THE PUBLIC WAY– COULD BE INDOORS OR OUTDOORS
• PUBLIC WAY – FINAL DESTINATION
• AREA OF REFUGE – SAFE SPOT
THREE MAIN CATEGORIES
EXIT ACCESS-DOORS
• MINIMUM SIZE 3068• MUST SWING IN
DIRECTION OF EGRESS TRAVEL
• MUST BE SIDE HINGED & SIDE SWINGING
• HARDWARE• FORCE• THRESHOLD
EXIT ACCESS-DOORS
• Door swing clearances
• “Latch side clearance”
EXIT ACCESS-STAIRS
• Exit Access stairs are uncommon
• Treads & Riser dimensions
• Landings• Ceiling Height• Hand & Guard
Rails
EXIT ACCESS-STAIRS
EXIT ACCESS-STAIRS
EXIT ACCESS-STAIRS
EXIT ACCESS - CORRIDORS
• SURROUNDING WALLS, FLOORS, & CEILING
• EITHER NON-RATED OR 1 HOUR RATED
• LENGTH & WIDTH LIMITED
EXIT ACCESS – AISLES
• Created by furniture or equipment
• Additional ADA accessibility clearances must be given
• Fixed seating in A1 occupancies are generally covered seperately in the codes
Exit Acess –Adjoining or Intervening Rooms
• “…direct, unobstructed, and obvious means of travel toward an exit.”
• Restrictions include storage rooms, restrooms, closets, bedrooms, locked rooms, kitches, file rooms.
• Does not apply to tenant spaces.
Exits
• End of Exit Access
• Must be fully enclosed and rated
• Codes dictate specific quantity, location and size for all exits (later)
• Four Types…..
Exits – Exterior Exit Doors
• Exception – not typically required to be fire rated.
• Simple doorway, exterior wall. Typically leads straight to exit discharge or public way.
Exits – Exit Stairs
• Most common type of exit
• Complete enclosure
• May include area of refuge
Exits –Horizontal Exits
• Typically used in Institutional occupancy classifications
Exits – Exit Passageways
• Extends an Exit
• Exit access doors can exit directly into
Exit Discharge
• Main lobby (interior – most common)
• Foyer or Vestibule (interior)
• Discharge Corridor (interior)
• Egress Court (exterior)
• Small Alley or Sidewalk (exterior)
Means of Egress CapacityHow many people can safely exit the
building in an emergency
4 Specifics to be determined
• Number of Exits
• Exit Width
• Exit Arrangement
• Travel distance
Number of ExitsOccupant Load per Story or Area Minimum No. of Exits
1-500 2
501-1000 3
Over 1000 4
Exit Widths
•Minimum door widths•Maximum door widths•More than one exit•Minimum exit discharge width•Minimum corridor width•50% percent rule
Exit Widths
Longer Aisle Accessway
12 inches +.05(x-12 feet)
Arrangementof Exits
• Remoteness = Half-diagonal rule
Arrangement of Exits
Travel Distance
“Common path of travel”
Dead-End Corridors
•Corridors vs Aisles
•20’ max or 50’ if in a sprinkled space.
Problem #2
Problem #3a. What is the total exit width
required for the telemarketing company in Space C? 175 x 0.15=26
b. What is the total exit width required for each exit stair?306 x 0.2=61
c. What is the minimum exit width required for the exit access corridor?
306 x 0.15=46
Problem #4 part b.12 inches + 0.5(x-12 feet)
12 inches + 0.5(23’-9” – 12 feet)12 inches + 0.5 (11’-9”)12 inches + 0.5 (11.75’)
12 inches +5.875” = 17.875 = 18 inches
Problem #5
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