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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-702.11.1 Locks permitted: Locks or fasteners shall not be installed on egress doors except in accordance with the following conditions: 1. In mental, penal or other institutions where secudty of inmates is necessary provided approved provisions are made to remove occupants in case of fire or other emergency utilizing properly trained supervisory personnel who are continuously on duty. 2. In problem security areas provided approved provisions are made for special- purpose door alarms or locking devices. Manually operated edge or surface mounted bolts are prohibited. 3. Key operation is permiffed from a dwelling unit provided the existing dwelling unit means of egress door contains a glass panel or is located immediately adjacent to an existing window or fixed glass panel and there is another approved means of egress door from the dwelling unit not requiring key operation from the inside. PM-702.12 Emergency escape: Every sleeping room located in a basement shall have at least one openable window or extedor 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 mm). The minimum net clear opening width dimension shall be 20 inches (508 ram). PM-702.13 Emergency lighting: All buildings, rooms or spaces required by the building code to have more than one exit or exit access, shall be equipped with approved emergency means of egress lighting to assure continued illumination 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: Pdvate garages located beneath a dwelling unit shall be separated from the dwelling unit by walls, partitions, floors and ceilings with a fire resistance rating of not less than one (1) hour. Private garages attached to a dwelling shall be completely separated from the dwelling unit, its basement 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. Doors separating garages from such dwelling units, basements or attics shall solid core doors with a minimum thickness of one and three-eighths (1-3/8) inches or approved equivalent door. PM-704.4 Barriers to fire: Fireblocking, draftstopping, fire stopping and thermal barriers required by the building code listed in Chapter 8 shall be maintained. -!6-