A course in structural drafting; . full head shouldbe shown as a half circle, Fig. 7. There are several forms of rivet heads among which are the flat, the cone, thebutton, the steeple and the of the rivet is carriedout to several degrees, depending muchon what the conditions in which thework is to be finished. The word countersunk means sim-ply the tapering of the hole outward andforcing the hot rivet to fill it and theexcess of material remaining a smooth surface is required thisexcess must be cut off, and. the term,countersunk and chipped, arises. Severa
A course in structural drafting; . full head shouldbe shown as a half circle, Fig. 7. There are several forms of rivet heads among which are the flat, the cone, thebutton, the steeple and the of the rivet is carriedout to several degrees, depending muchon what the conditions in which thework is to be finished. The word countersunk means sim-ply the tapering of the hole outward andforcing the hot rivet to fill it and theexcess of material remaining a smooth surface is required thisexcess must be cut off, and. the term,countersunk and chipped, arises. Several degrees of finish is notedin the standards adopted for the useof designers by concerns making orusing structural steel but nearly everydrafting room has its own list. Fig. 13 gives some sizes of rivets andit will be noted that the angle of thecountersunk head is generally drawn60°. The Conventional Rivet Signs aremade up from the books of the Co., and Carnegie Stel Co., andpresents the average practice. Fig. 14. -v^-i. CM< ft?
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