International Library of Technology; a Series of Textbooks for Persons Engaged in the Engineering Professions And Trades
International Library of Technology; a Series of Textbooks for Persons Engaged in the Engineering Professions And Trades
International Textbook Company
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140. The guard generally used is made in four styles, and is con- structed of galvanized-iron or cop- per wire. In Fig. 133 (a) is shown a guard used with convex tiles. The loop a acts as the snow stop and stands above the tile about 2 inches; the shank h is of sufficient length to extend well back on the tile, and is made flat so that it presents the least thickness at the tile lap; the end is turned down and out and is kept flat at r, to give a driving surface over the nail point d^ and to ra...ise the guard to the height of the tile. and Pro. 188 Digitized by VjOOQIC 114 ROOFING ^56 In Fig. 133 (b) is shown a gfuard made for flat or concave tiles. The loop and shank are the same as at (a), and the nail point is turned down without forming a knee, because the tiles do not stand more than i inch above the roof. In Fig. 134 (a) is shown a guard used for metal roofs with lock-seams. It is secured to the roof under the lock by a C^^ galvanized-iron nail driven through r\ the loop. IJ ^,,^^^ ^^ ^^^' ^^^ ^*^ ^^ shown a guard •^^ j^S^^ used for slate or shingle roofs.
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