Johnston, Philip Devereux, 1855- · New York, D. Williams Company · leaf 120
mthese corners draw lines to the vertex to complete thepyramid. Fig. 4 shows a simple truss. First draw the fouroutside members of the form and draw the diagon?.lsshown in dotted lines. These will be the centre linesof the diagonal braces. At the intersection of thesecentre lines draw a small… … F/G./.
Mechanical drawing
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