Here is a sample drwg of an embed plate will be made up of two plates, one plate is burned to the 287'-8 1/8" radius and the upstanding leg where the studs will be shot onto is wrapped around that burned radius and fillet welded.
http://img.photobucket.com/albums/v345/jwright650/welding%20pictures/Sampledrwgofembedplate.jpgCommonly the detailers will leave off important infomation that our fitters will need to lay out this plate and burn it to the correct radius. As in many shops you don't have room to stretch a string out 287'- 8 1/8" to layout this radius, so with the formulas given above you can figure the radius by segmenting at say 1'-0 intervals along the chord, this gives the fitter the dimensions that are picked up at these intervals. He will measure out the length of the chord on the floor and make a mark at 0" and at 9'-10 1/16" and then along that line he will make a mark at 11 1/16", and then at 1'-0 intervals. At this point he will start at the 11 1/16" mark and measure up 3/16"(using a square to so that the mark is perpendicular to the chord), then at the 1'-11 1/16" mark he will measure up 5/16" and make a mark, and so on down the line. Now he will take a straight edge and connect the marks that he made to make up the arc. With a radius as large as I have shown here 1'-0 or 2'-0 intervals are fine and will not showup as straight segmented lines, whereas if the radius was 50' you would want to mark at 6" intervals along the chord so that the arc will appear smooth.
Topic Welding Industry / Welding Fundamentals / Simple formulas for figuring parts of a circle/RT. triangle
