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Para. 1. Clear span shall mean the distance measured <br /> horizontally from the'inside of thei,platolto a point•directly <br /> beneath the ridge; the actual rafter length will depend on <br /> -the roof slope and must be determined accordingly. <br /> Para. 2. This table is for roofs with a minimum pitch of <br /> 5" to 12"; for the roofs with less pitch, the rafters shall be <br /> figured as floor joists. Spacing center to center 20". <br /> Size in inches = feet inches <br /> 2x4 7 3 <br /> 2x6 11 4 <br /> 2x8 16 7 <br /> Spacing center to center 241. .: . <br /> Size in inches: feet- inches <br /> 2x4 .. <br /> 6: 6 <br /> 2x6 10 3. <br /> 2x8 13 8 <br /> Tables I, II, III, IV.are based on a minimum fiber stress <br /> of 1200 lbs. <br /> III. FIRE PREVENTION REGULATIONS <br /> Section 1. Chimneys. <br /> Para. 1. All chimneys hereafter built in .any building <br /> used for habitation, business, or for public assembly, shall <br /> be built of brick or other incombustible material, constructed <br /> from the ground up and not supported or hung in any way <br /> by wood or combustible material. <br /> i <br /> Para. 2.. All chimneys shall have a terra-cotta flue lin= <br /> ing unless the chimney walls are 8 inches thick or more and <br /> shall be carried up to at least one foot above the highest <br /> point of the roof. <br /> Para. 3. No smoke pipe or metal flue.shall pass through <br /> s any wooden partition without a safety thimble of fireproof <br /> material, the thickness of the partition. <br /> The Board of Selectmen, annually in March, shall ap- <br /> point an Inspector of Gas Piping and Gas Appliances under <br /> r the provisions of Chapter 737, Section 2, Acts of 1960,and <br /> Section 3-0, Chapter 143, General Laws, to hold office from <br />"+ the first day of April h following. and until hi <br /> s successor. is <br /> 9 appointed and qualified. <br /> 8 <br />