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82 <br />A Beer or landing not more than 1 inch below <br />the threshold is required on cads side of an <br />exit door. Section 3303 (h). <br />83. <br />' Doors should not project trite than 7 inches in. <br />to the required corridor width when fully <br />opened or more than one hall into the required <br />corridor width when in any position. Section <br />3304(d)........................................................... <br />PA. <br />iRevolving (sliding) (overhead) doors are not per- <br />mitted as exit doors. Section 3303 (f). <br />Es. <br />Exit doors should provide immediate access to <br />an approved means of egress. Section 3303 <br />(C)• Exiting through another room does not <br />comply. <br />86. <br />j Corridors should have a minimum width of 44 <br />inches. Section 3304 (b). <br />87. <br />; Corridors serving nonambulalory persons should <br />' have an 8-foot minimum width. Section 3318 <br />(c). <br />83. <br />Dead end of corridors and exit balconies are <br />limited to 20 feet. Section 3304 (f). <br />89. <br />Walls and ceilings of corridors should be of one - <br />hour fire -resistive construction. Section 3304 <br />(g). An architectural section through the corri- <br />dor is necessary to determine flow this is <br />accomplished. <br />9D. <br />Exterior exit baL•.onics cannot project into an <br />area where protected openings are required <br />due to location on property. Section 3304 W. <br />................................................................. <br />91. <br />IInterior openings into corridors should be pro. <br />tected as specified in Section 3304 (It). <br />92. <br />.......................................... should have <br />IStairway <br />a minimum width of .................... Inches. Trim <br />and handraits should not project more than <br />31/ inches into tire required width. Section <br />j 3305 (b). <br />93. <br />'Risers on stairways should not exceed 71/z <br />inches and runs should not be less than 10 <br />inches. Section 3305 (c). <br />94. <br />Landings on stairways should have a dimension <br />in the direction of travel equal to the width of <br />fire stairway but need not exceed 4 feet. Sec. <br />lion 3305 (U. - <br />95. <br />Landings should not be reduced in width more <br />than 31/,, inches by a door when fully open. <br />Section 3305 (f). <br />95. <br />portion of stairways should have an <br />IBasement <br />approved barrier where continuous to upper <br />floors in an exit enclosure. Section 3305 (g). <br />97. IVertical <br />distances between stairway landings are <br />limited to 12 feet. Section 3305 (h). <br />93. ;handrails <br />should be placed not less than To - <br />Inches nor more than 34 inches above the <br />tread. Section 3305 (1). Two handrails are re- <br />quired where stairways exceed 44 inches in <br />width. <br />99. I <br />Guardrails for stairs, balconies. and landings <br />should conform wilh Section 1714. Note that <br />maximum clearance between intermediate rails <br />Is 9 Inches. <br />103. (Openings <br />in exterior walls within 10 feel of <br />exterior slaiiways should be protected with <br />sclbclosinn threedourths hour lire -resistive as. <br />selnblies. Section 3305 (k). <br />101. <br />Enclosed usable space under interior stairways <br />s6rnd11 he prnlecled on thn euclosed side as <br />required for one-hnttr fhe-resisltve construe. <br />lion. Section 3305 (1). <br />102. I <br />Noncombustible exterior chit. are required. <br />Section 3305 (in). <br />303. <br />Exterior stalls should not project into an area <br />(yards or courts) where wall openings must be <br />protected. Section 3305 (in). <br />204. <br />One stairway should extend to the roof. Section <br />3305 (it). It must be in a srtokeproof enclosure <br />in buildings over 75 feet in height. Section <br />3309 (b). <br />105. <br />Six-foot 6-inch minimum headroom clearance for <br />stairways should be indicated on plans. Section <br />3305 (o). Note that this is from a plane tan - <br />Cent to the stairway tread nosings. <br />10G. <br />Ramp slopes should not exceed one foot in <br />................................ feel. Section 3306 (c) (d). <br />I <br />107. <br />Surface of ramps should be roughened or of a <br />nonslip material. Section 3306 (f). <br />108. <br />Stairways should be enclosed as specified in <br />Section 3308. <br />(a) One (two) -hour fire -resistive walls are re- <br />quired. <br />(b) Only exit doors are allowed to open into exit <br />enclosures. <br />(c) Doors should be labeled one (one -and -one. <br />half) -hour fire assemblies. <br />(d) Exit enclosures should include a corridor on <br />the ground floor extending to the exterior. <br />Fire -resistive construction should be as re- <br />quired for the exit enclosure, including pro. <br />tected openings. Only exit doors are per. <br />mitted to open Into the corridor. <br />(e) An approved barrier is required at the <br />ground floor to prevent people from acci• <br />dentally continuing to the lower level. <br />(f) Usable space Is not allowed under the <br />stairs. <br />....................................................................... _..... <br />109. <br />One exit from the building should be a smoke. <br />proof enclosure complying with Section 3309. <br />1107 <br />.Openings into exit courts less than 10 feet wide <br />should be protected with labeled 45-minute fire <br />assemblies. Section 3310 (it). Also see •'exit <br />court" definition in Section 3301 (e). Openings <br />more than 10 feet above the court floor are <br />exempt. <br />' <br />111. <br />No openings other than required exits are per. <br />mitted in exit passageways. The passageways <br />should be of .........................hour fire -resistive <br />construction. Section 3311 (a). <br />112. <br />Exit illumination and signs should be provided in <br />conformance with Section 3312. <br />113. <br />Aisle (cross aisle) in auditorium should have a <br />minimum width of ..... ....................... ... Section <br />3313 (b). Section 3313 (e). <br />174. <br />"anic hardware is required on exit doors serving <br />Group D Occupancies having an occupant load <br />of more than 100. Section 3316 (a). In lieu <br />of Uds, doors shall have no locks or latches. <br />115. <br />:.lain and side exits in conformance with Sec. <br />Lion 3315 are required for 0.2 (1) Occupancies. <br />Section 3316 (a). ' <br />116. <br />Conidors of Group C Occupancies should have a <br />width required by Section 3302 plus 2 feet, but <br />not less than 6 feet- Section 3317 (e). <br />117. <br />Each floor above or below tire. ground floor level <br />' <br />of Group C Occupancies should have no less <br />Man two exit stairs. Section 3317 (g). <br />718. <br />Exit stairs serving an occupant load of more <br />than 100 fit a Group C Occupancy should have <br />a minimum clear width of 5 feet. Section 3317 <br />(8)• <br />119. <br />Every room with an occupant load exceeding <br />300 should have one of fls exits into a separate. <br />exit system. Section 3317 (b). <br />