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37 Cards in this Set
- Front
- Back
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3 parts of Means of Egress
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1- Exit Access.
2 - Exit. 3 - Exit Discharge. |
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Exit Access
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Occupied Spaces, not protected as means of escape.
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Exit
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Protected path of travel that allows people to escape the hazard.
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Exit Discharge
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Between end of the exit and the public way. A place that is open to the sky,
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Minimum Ceiling Height Egress Path
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7 feet 6 inches. With not more then 50% of the ceiling reduced to 80 inches.
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Protruding Objects below 80 inches above the floor.
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Protective barriers -less then 27 inches above floor. And Can not protrude more then 4 inches into the path.
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Handrails
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May protrude 4.5 inches into the path.
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Stair Width v.s. Corridor Width
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Because people move slower on stairs, the stair width must be wider then the corridor. Downstream corridor might be narrower then the upstream, but need to negotiate.
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Stairway in accessible means of egress
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Must be 48 inches wide, or more. Not applies in fully sprinkled buildings.
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Egress Door Width and Height
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Minimum of 32 inches wide and 80 inches tall. i.e. 3 feet by 6 feet 8 inches.
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Stairway Headroom
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Must have at least 80 inches headroom. spiral stair 78 inches.
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Stairway Width
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Minimum 44 inches wide. Occupant less then 50, 36 inches is ok.
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Corridors Width
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At least 44 inches wide
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Ramp Width
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At least 44 inches wide
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Common-Path-of-Egress Travel
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Any portion of the exit access, offering an occupant no choice between separate and distinct path of egress travel to TWO EXITS. 75-100 feet.
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Exit-Access Travel Distance
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Most common travel distance is 200 feet, 250-300 feet - sprinkled.
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Required Guards
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Required on all open-sided surfaces where level change is 30 inches or more.
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Guard Height
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42 inches above the walking surface. Measured vertically from the leading edge of the thread. Dwellings allow for 34-38 inches.
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Guard: Stop Sphere Passage.
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34 inches or below, a 4 inch sphere, 34-42, 8 inch sphere. in the triangle above the thread, 6 inch sphere.
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Handrails
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Both sides of the stair. (Except in dwellings)
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Handrails: Located
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34-38 inches above the walking surface of thread nose.
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Handrails: Circular Profile
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Between (Inclusive) 1.25 inches and 2 inches in diameter.
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Handrails: Non-Circular Profile
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Perimeter: between 4 and 6.25 inches.
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Handrail Clearance
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1.5 inches.
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Projections into Stairway
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4.5 inches maximum. (baseboards and stringers)
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Floor Area Allowances: Assembly
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7 sqf
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Floor Area Allowances: Dormitories
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50 sqf gross
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Floor Area Allowances: Classroom
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20 sqf net
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Floor Area Allowances: Residential
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200 sqf gross
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Floor Area Allowances: Warehouse / Aircraft Hangers
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500 sqf gross
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Floor Area Allowances: Office/Library
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100 sqf gross
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Use of slope vs. stair
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If elevation change is less 12 inches, use a slope. Single steps present trip hazard.
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Maximum rise between floors or landings.
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12 feet.
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Risers
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1. - 4 - 7 inches. 7.75 inches maximum in dwellings. uniform with 3/8 inch tolerance
2. - on accessible path closed. on non-accessible must prevent passage of 4 inch sphere." |
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Treads
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1. minimum 11 inches deep. 10 inches in dwellings. uniform with 3/8 inch tolerance.
2. radius of the leading thread edge 0.5 inches max, and project 1.15 inches out. |
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Means of Egress
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Continuous and unobstructed path of travel (vertical and/or horizontal) from any point in the building to a public way.
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Doors swinging into Egress corridor
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Door can not swing into the egress path, blocking not more then half of it. And when its fully open, can not project more then 7 inches into the path.
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