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(CHAPTER 7 SAFETY REQUIREMENTS) (SECTION PM-702 MEANS OF EGRESS) PM-702.9 Stairways, handrails and guards: Every exterior and interior ~ght of stairs having more than four risers shall have a handndl on at least one side of the stairs, and every open portion of a stair, landing, balcony, porch, deck, ramp or other walking surface which is more than 30 inches (762mm) above the floor or grade below shall have guards. Handrails shall not be less than 30 inches (762mm) more than 42 inches (1067ram) high, measured vertically above the nosing of the tread or above the finished floor of the landing or walking surface. Guards shall be not less than 30 inches (762mm) high above the floor of the landing, balcony, porch, deck, ramp or other walking surface. PM-702.12 Emergency escape: Every sleeping room located in a basement shall have at least one openable window or exterior door approved for emergency egress or rescue; or shall have access to not less than two approved independent exits. Where a window is provided for emergency egress or rescue, the window shall have the bottom of the clear opening not more than 44 inches (1118 ram) above the floor. The minimum net clear opening shall be 5 square feet (0.47 m2). The minimum net clear opening height dimension shall be 24 inches (610 ram). The minimum net clear opening width dimension shall be 20 inches (508 ram). Bars, grilles or screens placed over emergency escape windows shall be releasable or removable from the inside without the use of a key, tool or force greater than that which is required for normal operation of the window. Exception: An outside window or an exterior door for emergency escape is not required in buildings equipped throughout with an approved automatic fire suppression system. PM-702.13 Emergency lighting: All buildings, rooms or spaces required to have more than one exit or exit access, shall be equipped with approved emergency means of egress lighting to assure continued ~lumination for a duration of not less than 1 hour in case of a power loss. All illuminated exit signs shall be connected to an approved emergency power SOurce. Exceptions: One- and Two-family dwellings or multiple family dwellings not exceeding three stories in height and six dwelling units per floor. (SECTION PM-704.0 FIRE RESISTANCE RATINGS) PM-704.3 Attached garages: Private garages located beneath a dwelling shall have walls, partitions, floors and ceilings separating the garage space from the dwelling constructed of not less than one (1) hour fire resistance rating. Private garages attached to a dwelling shall be completely separated from the dwelling and its attic area by means of one-half (1/2) inch gypsum board'or equivalent applied to the garage side and taped at the joints. The door opening protective shall be minimum one and three-eighths (1- 3/8) inch solid core doors or approved equivalent.