A course in structural drafting; . When fiat bars with sleeve nut ad-justment are made of iron or steel theyare upset at the screw end, and the ma-terial for each bar ordered for onelength accordingly. It has been notedin the blue prints of a well known firmthat the minimum length of finished up- If it becomes necessary to make themshorter order stock for two rods in-cluding the amount for turning the loop. /n _^!. 4 1 *» r >Lr» « / —> Fig. 27 and making the upset, these to be cutafter upsetting and the loops turned. If forked loop is desired, two rodswithout loops and after upsetting an
A course in structural drafting; . When fiat bars with sleeve nut ad-justment are made of iron or steel theyare upset at the screw end, and the ma-terial for each bar ordered for onelength accordingly. It has been notedin the blue prints of a well known firmthat the minimum length of finished up- If it becomes necessary to make themshorter order stock for two rods in-cluding the amount for turning the loop. /n _^!. 4 1 *» r >Lr» « / —> Fig. 27 and making the upset, these to be cutafter upsetting and the loops turned. If forked loop is desired, two rodswithout loops and after upsetting andcutting in two, the forks are welded rod which can be made in a machineis 24 inches fo reither loop or fork. Pins are used extensively in struc-tural work, especially the brace rods ortie rods in the buildings and the eye-bars in bridge work. Fig. 27. The head of the pin is slightly largerthan the body and the end is tapered toaid in entering the holes. The pins must be calculated to standa shearing stress of about 38,000 grip of a pin is the clear distancebetween head and nut or between figuring lengths of pins, iV will beallowed for each space between eyehose, and in order to be sure that alldistance between shoulders is ^greater than the grip of the pin. The holes are usually s^ more indiameter than the pin. Rough pins in bored holes have 3^play. Rough pins in rough h
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