. Cyclopedia of architecture, carpentry, and building : a general reference work .... Fig. 73. Fig. 74. in Fig. 72, while the projections to A, B, C, D are obtainedfrom A, B, C, D in front elevation in Fig. 71, measuring ineach instance from S T. If desired the top and lower flange shown in the perspectivein Fig. 70 can be added to the patterns in Fig. 72. Laps areallowed to the patterns to allow for double seaming at corners, if,however, the pattern should be required in one piece, it would only 153 82 SHEET METAL WORK be necessary to join the various pieces in tlieir proper positions asshown
. Cyclopedia of architecture, carpentry, and building : a general reference work .... Fig. 73. Fig. 74. in Fig. 72, while the projections to A, B, C, D are obtainedfrom A, B, C, D in front elevation in Fig. 71, measuring ineach instance from S T. If desired the top and lower flange shown in the perspectivein Fig. 70 can be added to the patterns in Fig. 72. Laps areallowed to the patterns to allow for double seaming at corners, if,however, the pattern should be required in one piece, it would only 153 82 SHEET METAL WORK be necessary to join the various pieces in tlieir proper positions asshown by a d he in Fig. 73, which would bring the seam on the line J N in plan in Fig. Fig. 74 is shown a per-spective view of a curvedrectanopular chute the con-struction of which arises inpiping and blower work. Theproblem as here presentedshows the sides a and a invertical planes having thesame height, while the bot-tom h has more width thanthe top c. The top openingis to rise above the bottomopening a given distanceequal to C. First draw theplan and elevation as shownin Fig.
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Keywords: ., bookcentury1900, bookdecade1900, booksub, booksubjectarchitecture
