Laying out for boiler makers and sheet metal workers; a practical treatise on the layout of boilers, stacks, tanks, pipes, elbows, and miscellaneous sheet metal work . s. First, draw the line .IB for the lower row of rivets l^inches from the edge of the plate. Then measure from oneend of the plate along the line AB 1J4 inches for the this point measure i 15-16 inches for the second row ofrivets. Now, lay off from this point along AB 114 inches asshown by the dimensions on Fig. 11. Measure back from thispoint I 15-16 inches for the second row of rivets at this end ofthe plate. Draw the
Laying out for boiler makers and sheet metal workers; a practical treatise on the layout of boilers, stacks, tanks, pipes, elbows, and miscellaneous sheet metal work . s. First, draw the line .IB for the lower row of rivets l^inches from the edge of the plate. Then measure from oneend of the plate along the line AB 1J4 inches for the this point measure i 15-16 inches for the second row ofrivets. Now, lay off from this point along AB 114 inches asshown by the dimensions on Fig. 11. Measure back from thispoint I 15-16 inches for the second row of rivets at this end ofthe plate. Draw the line CD 48 inches from AB. Now,square up the plate by the method previously explained and rolled up so that the outer row of rivets at this end of theplate can be spaced equally. The rivet holes in the other rowmay be conveniently located by setting the dividers to thediagonal pitch, and then with the centers of the holes, whichhave been equally spaced as centers, strike intersecting arcs asshown in Fig. 13. When the end of the plate comes betweentwo other plates at the corners the plate should be drawnout thin or scarfed. As this plate is an outside ring, the. <^jfV FIG. 13. corners of the end which comes inside at the lap should bescarfed as indicated by the dotted lines in Fig. 11. The layout of the inside ring is similar to that of the out-side, except that the length between the centers of the rivetholes is less than that of the outside plate by six times thethickness of the material. As the plate is 5-16 inch thick, sixtimes the thickness will be ij^ inches; therefore, tlie length ofthis plate should be 114 inches minus 1% of ii2yi inches. Thepitch of the rivets in the circular seam will not be the same asin the outside plate, since the number of spaces must be the THE SUBJECT OF LAYING OUT 13 same. As this is an inside ring, the corners of that end of theplate, which comes outside at the lap when the plate is rolledup, should be scarfed as indicated by the dotted lin
Size: 1687px × 1481px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookidl, booksubjectsteamboilers
