Cyclopedia of architecture, carpentry, and building : a general reference work . es. Shingle roofs are very seldom used on buildings formanufacturing purposes, for the reason that they take fire quitereadily, leak quite easily, and require renewal quite often. Shinglesare from 18 to 24 inches long, and usually run from 2 to 8 inches in 223 10 ROOF TRUSSES width, although they can be obtained of a uniform width of from 4to G inches. They are laid like slate, the lap being made 4 inches ormore. They should never be laid on roofs whose pitch is less than ^.It takes about from 800 to 1,000 shingle
Cyclopedia of architecture, carpentry, and building : a general reference work . es. Shingle roofs are very seldom used on buildings formanufacturing purposes, for the reason that they take fire quitereadily, leak quite easily, and require renewal quite often. Shinglesare from 18 to 24 inches long, and usually run from 2 to 8 inches in 223 10 ROOF TRUSSES width, although they can be obtained of a uniform width of from 4to G inches. They are laid like slate, the lap being made 4 inches ormore. They should never be laid on roofs whose pitch is less than ^.It takes about from 800 to 1,000 shingles to lay 100 square feet ofroof. The cost is about $ per 100 square feet; but under the bestconditions, the life of shingles is only about ten years. Corrugated Steel. Corrugated steel is made from flat sheets ofstandard gauges, and may be either galvanized or left as it comesfrom the rolls. The corrugations are of different size^; and widths;the total width of the platesruns from 24 to 28 inches,and their length from 5 to10 feet, varying by | sheet most used for. Fig. 13. Showing How .Steel Roofing isFastened to Purlins. roof construction has 2|-inchcorrugations; is 26 inches wideafter corrugating; and willcover a width of 24 incheswith one lap and 211 incheswith two laps. This roofingshould be laid with a pitch of not less than J, and should have from 6 to 8 inches lap at the ends. For further information regarding the method of lapping and the width covered, see Fig. 12. Corrugated steel is fastened either directly to wooden purlins by means of nails, or directly to iron purlins either by means of a bolt and clip or by a clinch nail (see Fig. 13). It is often advisable to know the strength of corrugated steel when supported at certain distances apart by supports perpendicular to the corrugations. This unsupported length determines in many cases the spacing of the purlins. The load in pounds per square foot which can be carried by a plate of span I, parallel to t
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Keywords: ., bo, bookcentury1900, booksubjectarchitecture, booksubjectbuilding
