Presentation on theme: "7 | Means of Egress (Life Safety Code)"— Presentation transcript:
1 7 | Means of Egress (Life Safety Code) Session 22 | Codes | Gary Parker7 | Means of Egress (Life Safety Code)Exercises
2 1 - What is the definition of a means of egress system 1 - What is the definition of a means of egress system? What are its three distinct element?2 – What is the minimum ceiling height permitted along a means of egress?3 – How must guards be constructed to limit the passage through the protective barrier?4 – What is considered an accessible means of egress? How many are required in a building?5 – Under which conditions are intermediate handrails required?6 – What is the maximum vertical rise permitted between stairway landings?7 – Why do turnstiles create special egress concerns? What are the limitations on their use?
3 8 - What is the maximum height of a threshold on a doorway? 9 – When must doors swing in the direction of egress travel?10 – To what extent must handrails extent beyond the top and the bottom risers of a stair flight?11 – How much clear space is needed between a handrail and a wall or other surface?12 – What is the maximum permissible ramp slope?13 – How is exiting addressed where exits serve more than one floor?14 – What method shall be used to calculate the occupant load in areas with fixed seating, such as benches, pews or booths?
4 Given:. Dance floor 280 sq ft. Tables and chairs 1200 sq ft Given: Dance floor 280 sq ft Tables and chairs 1200 sq ft 5 booths (10 6 ft eachDetermine: The occupant loadThe minimum required egress width
5 That portion of the exit access that occupants must traverse before two separate and distinct paths of egress travel to two exits are available is defined as .means of egresssingle egress pathcommon path of egress travellimited egress travel distanceReferencec2 Panic hardware and fire exit hardware shall be installed a minimum of inches and a maximum of inches above the finished floor.32, 4834, 4234, 4836, 54Referencec Sec
6 3. In general, a door opening shall provide a minimum clear width of 3 In general, a door opening shall provide a minimum clear width of inches.30323436Referenceb Sec4 For a 60-inch-wide stairway having a straight run, any immediate landing shall have a minimum of inches in length.36444860Referencec Sec Exception No.1
7 5 Where serving a maximum of five occupants in existing buildings, a spiral stairway may be used as a means of egress component provided that the headroom is a minimum of inches.76788084Referenceb Sec6 Only those ramps having a maximum rise of inches are permitted without complying handrails.6122430Referencea Sec
8 7. Unless having a maximum height of 7 Unless having a maximum height of inches, turnstiles shall be regulated as for revolving doors.34363839Referenced Sec8 At a door opening, the maximum permitted projection into the required clear width shall be inch(es) at any point between 34 inches and 80 inches above the floor.0, no projections are permitted14Referenced Sec
9 9 Where a stairway serves an assembly occupancy, handrails having a circular cross section shall have a minimum outside diameter of inches and a maximum diameter of inches.1 ¼, 21 ¼, 2 5/81 ½, 21 ½, 2 5/8Referencea Sec (3)10 In a fully-sprinklered Group B office building having an occupancy load of 3,200 occupants, the minimum total calculated means of egress width by egress other than stairways shall be inches.960640480320Referenceb Table
10 11 Other than at sliding doors serving dwelling units, the maximum height for thresholds at doorways is inch.1/81/41/21Referencec Sec12 At a doorway, the minimum headroom clearance below any door closer or stop shall be inches.76788084Referenceb Sec
11 13. Stairway handrails shall be located a minimum of 13 Stairway handrails shall be located a minimum of inches and a maximum of inches above stair tread nosings.30, 3430, 3832, 3434, 38Referencec Sec14 An area of refuge serving 450 occupants shall be provided with a minimum of wheelchair space(s).1235Referencec Sec
12 15 A stairway serving 400 occupants in a fully-sprinklered hospital shall be a minimum of inches in width.6080120160Referencec Table16 Exit signs shall be located so that the maximum distance from any point in an exit access corridor to the nearest visible exit sign is feet, or the listed viewing distance for the sign, whichever is less.5075100150Referencec Sec
13 17 Other than handrails serving stairs and ramps, the maximum projection into the travel path of a horizontal projection located 48 inches above the walking surface shall be inches.1 ½3 ½44 ½Referencec Sec18 In areas of a Group S-1 occupancy not open to the public, horizontal intermediate rails in a required guard shall be constructed so that a minimum sphere cannot pass through any opening.4-inch6-inch12-inch21-inchReferenced Sec (3) Exception 2
14 19 Emergency lighting facilities for means of egress illumination shall provide along the path of egress at floor level.at least 1 foot-candlean average of 1foot-candleat least 5 foot-candlesan average of 0.2 foot-candleReferenceb Sec20 A revolving door shall be provided with a side-hinged swinging door located in the same wall and within feet from the revolving door.5102050Referenceb Sec (e)
15 21 Multiple egress exits shall be sized so that the loss of any one egress exit shall not reduce the the available capacity by a maximum of of the required capacity.10 percent25 percent33 1/3 percent50 percentReferenced Sec