Figure 1-50.—Standard symbols for welded joints.
Figure 1-51 shows the use of a welding symbol. This
figure shows a steel-pipe column that is to be welded to
a baseplate. The symbol identifies to the welder that the
type of weld to be used is a fillet weld, that the weld is
to extend completely around the pipe-to-column joint,
and that the weld is to be made in-place in the field rather
than in a fabrication shop.
A detailed explanation of welding symbols and their
usage is contained in Symbols for Welding and
Nondestructive Testing, ANSI/AWS A2.4-86. Welding
terms and definitions are found in Standard Welding
Terms and Definitions, ANSI/AWS A3.0-89.
Pins
Pins for very large structures are manufactured
especially for the type of job and may have diameters of
24 inches or more and be several feet in length. For most
types of jobs, however, pins are between 1 1/4 inches
and 10 inches in diameter. The two types of pins
commonly used are threaded-bridge pins and cotter
1-26
