Ordinance 1880-92 - Laserfiche WebLink

APPENDIX I-A 1991 UNIFORM FIRE CODE B 30 inches,exclusive of handrails. Everystairway shall have at least one handrail. I A landing having a minimum 30-inch run in the direction of travel shall be pro- BB vided at each point of access to the stairway. EXCEPTION: Fire escapes as provided for in this section. I Exterior stairs shall be of noncombustible construction. B EXCEPTION: On buildings of Types III,IV and V.provided the exterior stairs are constructed of wood not less than 2-inch nominal thickness. B (c)Corridors.Corridors of Groups A,B,E,H,1 and R,Division 1 Occupancies I serving as an exit for an occupant load of 30 or more shall have walls and ceilings B of not less than one-hour fire-resistive construction as required by the Building I Code. Existing walls surfaced with wood lath and plaster in good condition or BB t/2-inch gypsum wallboard or openings with fixed wired glass set in steel frames are permitted for corridor walls and ceilings and occupancy separations when I approved. Doors opening into such corridors shall be protected by 20-minute fire B assemblies or solid wood doors not less than 13/4 inches thick. Where the existing I frame will not accommodate the 13/4-inch-thick door, a 13/s-inch-thick solid B bonded wood core door or equivalent insulated steel door4shall be permitted. I Doors shall be self-closing or automatic-closing by smoke detection. Transoms B and openings other than doors from corridors to rooms shall comply with Section I 3305 (h) of the Building Code or shall be covered with a minimum of 3/4-inch B plywood or t/2-inch gypsum wallboard or equivalent material on the room side. EXCEPTION: Existing corridor walls, ceilings and opening protection not in B compliance with the above may be continued when such buildings are protected I with an approved automatic sprinkler system throughout. Such sprinkler system B may be supplied from the domestic water system if it is of adequate volume and I , pressure. B (d) Fire Escapes. 1. Existing fire escapes which in the opinion of the chief I comply with the intent of this section may be used as one of the required exits.The B location and anchorage of fire escapes shall be of approved design and construc- tion. I 2. Fire escapes shall comply with the following: B Access from a corridor shall not be through an intervening room. I All openings within 10 feet shall be protected by three-fourths-hour fire assem- BB blies.When located within a recess or vestibule,adjacent enclosure walls shall not r:,:i., be of less than one-hour fire-resistive construction. _ 7 j I Egress from the building shall be by a clear opening having a minimum dimen- B sion of not less than 29 inches. Such openings shall be openable from the inside I without the use of a key or special knowledge or effort.The sill of an opening giv- B ing access shall not be more than 30 inches above the floor of the building or bal- I cony. B Fire escape stairways and balconies shall support the dead load plus a live load t of not less than 100 pounds per square foot and shall be provided with a top and BB intermediate handrail on each side. The pitch of the stairway shall not exceed 60 degrees with a minimum width of 18 inches.Treads shall not be less than 4 in- I ches in width and the rise between treads shall not exceed 10 inches. All stair and 452