Figure 1-50.—Standard symbols for welded joints.Figure 1-51 shows the use of a welding symbol. Thisfigure shows a steel-pipe column that is to be welded toa baseplate. The symbol identifies to the welder that thetype of weld to be used is a fillet weld, that the weld isto extend completely around the pipe-to-column joint,and that the weld is to be made in-place in the field ratherthan in a fabrication shop.A detailed explanation of welding symbols and theirusage is contained in Symbols for Welding andNondestructive Testing, ANSI/AWS A2.4-86. Weldingterms and definitions are found in Standard WeldingTerms and Definitions, ANSI/AWS A3.0-89.PinsPins for very large structures are manufacturedespecially for the type of job and may have diameters of24 inches or more and be several feet in length. For mosttypes of jobs, however, pins are between 1 1/4 inchesand 10 inches in diameter. The two types of pinscommonly used are threaded-bridge pins and cotter1-26
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