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224 6
<br />HOMES AND CAMPS IN FORM AREA-
<br />3-3.3 All stairways shall comply at least wi!h the mini-
<br />mum requirements for Class B stairs in existing buildings,
<br />as described in NFPA 101. Life Safety Code, that is, the
<br />stairway shall be at least 36 in. (91.4 cm) wide, with max
<br />imum height of risers being 8 in (20.3 cm) and minimum
<br />width of tread 9 in. (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 outside of the building, shall have at least
<br />one exterior window which can be opened from the inside
<br />without the use )f tools to provide a clear opening of not
<br />less than 22 in. (56 cm) in least dimension and 5 square ft
<br />(1.5 ins) in area. 'The bottom sill shall not be more than 4
<br />ft (1.2 m) above the floor.
<br />3-3.54� No stove or combustion heater shall be located
<br />dtr under, or immediately at the toot of, stairs or
<br />otht.....se block escape in case of malfunctioning 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 opened from the inside for
<br />emergency egress.
<br />3-3.7 These exit requirement,, apply to all occupied
<br />areas, particularly bedrooms an,i basement recreation
<br />rooms.
<br />34• Interior Finish.
<br />34.10 Interior finish shall be of the type described in
<br />Section 6-2, NFPA 101, Life Safety Code,
<br />3-5a 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 laborst my.
<br />3-6 Spark Arresters.
<br />3-6.1 Chimneys of homes and cottages in areas partcu
<br />larly susceptible to ignition from chimney sparks shall be
<br />equippped with spark arresters that meet the requirements
<br />of NFPA 211. Chimneys, Frrel4aces. 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 serves.
<br />5-6.1.2 Arresters shall have a vertical hei ht of not less
<br />than 1.3 times the minimum diameter of the chimney
<br />flue o► the minimum horizontal dimens' n of rectangular
<br />chimney flue.
<br />3-6.1.3 Arresters, including bolts, rivets, screws, and
<br />supporting member, shall be made of stainless ..teel
<br />(AST'M A167. Type 316, or AST'M A478, Type 316. or
<br />the equivalent).
<br />3-6.1.40 Openings shall not permit the par.age of
<br />Rphem having a diaritseter larger than 4in (i Y7 c m
<br />nor hlcx•k the passage of spheres having a dwineter of less
<br />than % in. (0.95 cml.
<br />3-6.1.5 Means shail be provided for securely attaching
<br />the spark arresters to chimney% 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• 1.1a All electrical installations shall be made in con-
<br />formance with NFPA 70. National Electrical Code*, and
<br />NFPA 70A, Electncal Code for Ore- and Two -Family
<br />Dwellings, in the United States, and shal: be made in con
<br />formance with the Canadian Electncal Code. in Canada.
<br />4-1.2 Fuses and circuit breakers shall provide protec
<br />tion so the a urrent is shut off when circuits are overloaded
<br />or there is a short circuit.
<br />4-1.3 Electrical circuits and equipment, where required
<br />to he grounded, shall be grounded according to re
<br />quiretnents of Article 250 of NFPA 70, National Elec-
<br />trical Code.
<br />4-1.40 Electrical equipment (fixtures, receptacles, etc )
<br />installed outdoors shall be of a type approved for outdoor
<br />conditions.
<br />4-1.5• Electrical power totals, used indoors or outdoors,
<br />shall he grounded unless protected by a system of double
<br />insulation or its equivalent. Where double insulation is
<br />employed, the equipment shall be distinctively marked.
<br />4-1.6 The electrical service drop conductors between
<br />service pole (transformer) and weatherhead at the
<br />building shall be installed with proper clearances from
<br />the ground as required by Article 230. NFPA 70. Na-
<br />tional Electrical Code Care shall be taken to remove any
<br />obstructions, su-h as tree limbs or branches.
<br />4-2 Radio and Television Equipment.
<br />4-2.1 All radio and television equipment shall lie in-
<br />stalled according to the requirements of Article 810.
<br />Chapter 8 of NFPA 70, National Llectrical Cade. "no
<br />tiFPA 78. Lightning Prolect,on Code
<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 memben If the build►r.g has an aMneed 1tgght
<br />ping prcxect►on system, metallic masts, where installed
<br />outside the building, shall be banded properly to the
<br />lightning protection svatem. with standard lightning con
<br />ducton or the equivalent. lead it conductors shall! be
<br />protected by approved lightning[ar, -stets. Antennas shall
<br />ncn he installed where they can fall aga,risi lx>wer lines tw,
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