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31B-230 (17) THE MASSACHUSETTS STATE BUILDING CODE ' 3401.9.2 Fire protection: The garage shall have five-eighths(5/8) inch gypsum board on the garage side of wall or floor adjacent to the house, and wherever the attic area is continuous between the garage and the house a firestop of one-half(1/2) inch gypsum board shall be used to form a barrier to separate the garage and house. 3401.9.3 Flooring: Garage and carport floor surfaces shall be approved nonabsorbent, noncombustible material. 3401.9.4 Floor level: The floor level of all door openings between the garage and the dwelling shall have either a mini-mum four (4) inch raised sill or the floor shall have a ramp or floor pitched a minimum of five (5) per cent in the direction of the overhead garage doors. 3401.10 Egress 3401.10.1 Means of egress: In one- and two-family dwellings,each dwelling unit shall have two (2) independent means of egres�, remote as possible from each Cher and leading to grade; in addition, every floor within a dwelling unit shall have at least one-(1) means of egress which shall provide a continuous and • unoL'.ructed path leading to grade. 3401.10.2 Egress doors: Access to grade at termination of the required means of egress may be provided by the uce of both side-hinged swinging doors or sliding glass doors. Swinging doors provided to meet this requirement may swing inward. 3401.10.3 Emergency egress: Sleeping rooms shall have at least one (1) open:ble window or exterior door to permit emerg,:ncy egress or rescue. A required window must be openable from the inside without the use of separate tools, and shall conform to the following: 1. the sill height shall be not more than forty-four (44) inches above the finish floor; slmll provide a minimum net clear openin area of 3.3 ,1; ,..rlcinnr of twri,11, ('?n) inrhrc }h„ -)f ..1,,w• (''1 inehPc. in either dhrection. It a double bung unit is usu, ti en such dimensions shah . ._ .l.11 '.YCAyJ 1.411U 11C/11 r-.yJ 1 ) {0.4.-1 Interior doorways: 'Tile minimum nominal width of any interior 11 f_ (3: t 780 CMR - Fifth Edition