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 . YING OUT FOR BOILER ^lAKERS puted, since the height of the frustum between bases is width of the sheet or the slant height of the frustum isthe hypotenuse of a right triangle, one leg of which is 12 andthe other one-half the difference between the diameters of thelower and upper bases, or ^ (10 — 8) = i. Therefore, the width of the plate equals V12- -j- i = V145 = Referring to Fig. 32, it will be seen that we no
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 . YING OUT FOR BOILER ^lAKERS puted, since the height of the frustum between bases is width of the sheet or the slant height of the frustum isthe hypotenuse of a right triangle, one leg of which is 12 andthe other one-half the difference between the diameters of thelower and upper bases, or ^ (10 — 8) = i. Therefore, the width of the plate equals V12- -j- i = V145 = Referring to Fig. 32, it will be seen that we now have thefollowing dimensions: the distance OE or the camber of the plate. To do this, witha straight edge and square, square up from O the center ofthe line CD, the line OS to the line AC. With O as a centerset the trams to the linfe OS and draw an arc from 5 to theline CD. Find the middle point of this arc and draw the lineOT through it. Then the distance TC is equal to the requiredcamber of the plate, and may be laid off from 0 to E. Careshould be taken to use the distance TC and not the distanceST, since the two are unequal, especially when the camber is.
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Keywords: ., bookcentury1900, bookdecade1900, bookidl, booksubjectsteamboilers
