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224 6 HOWS AND CAMPS IN FOREST AREAS
<br />3-3.3 All srairways shall comply at least wi,h the mini.
<br />mum requirements for Class B stairs in existing buildings.
<br />as described in NFPA 101, L oje Safety Code. that is, thr
<br />stairway shall be at least 36-in. (91 4•cm) wide, with max
<br />inium height of risers being 8 in. (20.3 cm) and minimum
<br />width of tread 9 iu. (23 cm).
<br />3-3.4 Every sleeping room. unless it has two doors pro-
<br />viding separate ways of escape, or has a door leading di-
<br />rectly to the aatside of the building, shall have at least
<br />one exterior window which can be opened from the inside
<br />without the use of tools to provide a clear oFming of not
<br />less than 22 in. (56 cm) in least dimension and 5 square ft
<br />(1.5 mt) in area. The bottom sill shall not be rnc.re than 4
<br />It (1.2 m) above the floor.
<br />3-3.5• No stove or combustion heater shall be fixated
<br />directly under, or immediately at the foot of, stairs or
<br />otherwise block escape in case of inafunctioning of the
<br />stove or heater.
<br />3-3.6• When awning or hopper type windows are used,
<br />they shall be hinged or otherwise arranged to allow side
<br />brackets to drop and permit the full opening to be used
<br />for escape. Where quick -opening devices are provided,
<br />they shall be the type easily cpened from the inside for
<br />emergency egress.
<br />3-3.7 Thew exit requirements apply to all occupied
<br />areas, particularly bedrewmms and basement recreation
<br />rooms.
<br />34• Interior Finish.
<br />34.i. Interior finish shall be of the type described in
<br />Section 6-2. NFPA 10e, Life Safety Code.
<br />3-5+ Roof Coverings.
<br />3-5.1 Roof coverings shall be noncombustible or
<br />classified as Class C or better as a result of tests and
<br />listings by a testing laboratory
<br />3-6 Spark Arreaten.
<br />3-6.1 Chimneys of homes and cottages in areas particu
<br />larly susceptible to ignition from chimney sparks shall be
<br />equipped with spark arresters that meet the requirements
<br />of NFPA 211, CAtrrineys, Firefilacci, and Vents. Essen
<br />tially, the standard requires the following:
<br />3-6.1.1 The net free area of the arrester shall be not less
<br />than four times the net free area of the outlet of the
<br />chimney flue it srrves.
<br />3-6.I.2 Arresters shall have a vertical height of not less
<br />than 1.3 times the minitnum diameter of the chimney
<br />flue or the minimum horizontal dimension of rtotanRul it
<br />chimney flue.
<br />3-6.1.3 Arresters, including bolts, rivets. screws, and
<br />alpppooning members. shall be made of stainless steel
<br />(AM A167, "1'ype S16. or AyTM A478, Type 516, or
<br />the equivalent).
<br />3-6.1.4O tongs shall row permit the passa�+r of
<br />sphem having a diameter largethan 14 in. (I.27 cm)
<br />nor bl,x k the- passage of spheres having a diameter of less
<br />than'i in. (0.95 (m).
<br />3-6.1.5 Means shall be provided for securely attaching
<br />the spark arresters to chimneys to provide adequate Sup-
<br />port and prevent movement of the arrester.
<br />Chapter 4 Electrical Equipment
<br />4-1 Installation and Safety Precautions.
<br />4-1.10 All electrical installations shall be made in con-
<br />formance with NFPA 70, National Electrical Codex , and
<br />NFPA 70A, Electrical Cade for One and Two -Family
<br />Dwell"194, in the United States, and shall be made in con
<br />formarce with the Canadian Elec-trrcai rode in Canada.
<br />4-1.2 Fuses and circuit breakers shall provide protec-
<br />tion se the current is shut off wht n circuits are overloaded
<br />or there is a short circuit
<br />4-1.3 Electrical circuits and equipment, where required
<br />to be grounded, shall be grounded according to re•
<br />quirernencs of Article 250 of NFPA 70, National F_lec-
<br />trical Code.
<br />4-1.4• kieetric:a equipmert (fixtures, receptacles, etc.)
<br />installed out&: rs shall be •if a type approved for outdoor
<br />conditions.
<br />4-1.50 Electrical power tools, used indoors or outdoors.
<br />shall be grounded unless protected by a system of double
<br />insulation or its equivalent. Where double insulation is
<br />employed. the equipment shall be distinctively markets.
<br />4-1.6 The electrical service drop conductors between
<br />service pole (transformer) and weatherhead at the
<br />building shall be installed with pro wr clearances from
<br />the gr...iund as required by Article 230, `.NFPA 70, Na-
<br />tional Electrical Code. Care shall he taken to remove am
<br />chstructi,ms, such as tree limbs of . —ches.
<br />4-2 Radio and Television Equipment.
<br />4-2.1 All radio and television equipment shall be in-
<br />stalled acc_,rding to the requirements of Article 810,
<br />Chapter 8 of NFPA 70, Natronal Electrical Code, and
<br />NFPA 78 L.rghtntng f'rote(tron rode.
<br />4-3 Lightning Protection.
<br />4-3.10 For safety against lightning, all metal structures
<br />Shall be grounded including masts and poles supporting
<br />antenna nersihm. If the building has an approved light
<br />nine protection system. metallic mast.,. where installed
<br />out.ide the building, shall be banded properly to the
<br />lightiiir:g protection rytaem, Seth standard lightning con,
<br />ductors or the equivalent. Lead-in conductors shall be
<br />Frruected by approved light ning at"ers Antennas shall
<br />nee, be installed where they can fall agetrat power lines of.
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