Page 97 - Structural Steel Designers Handbook AISC, AASHTO, AISI, ASTM, and ASCE-07 Design Standards

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CONNECTIONS

CONNECTIONS 3.29

A continuous weld all around a joint is indicated by a small circle around the intersection of line
and arrow:

Such a symbol would be used, for example, to specify a weld joining a pipe column to a base plate.
The all-around symbol, however, should not be used as a substitute for computation of actual weld
length required. Note that the type of weld is indicated below the line in the all-around symbol,
regardless of shape or extent of joint.
The preceding devices for providing information with fillet welds also apply to groove welds. In
addition, groove-weld symbols also must designate material preparation required. This often is best
shown on a cross section of the joint.
A square-groove weld (made in thin material) without root opening is indicated by

Length is not shown on the welding symbol for groove welds because these welds almost always
extend the full length of the joint.
A short curved line below a square-groove symbol indicates weld contour. A short straight line
in that position represents a flush weld surface. If the weld is not to be ground, however, that part of
the symbol is usually omitted. When grinding is required, it must be indicated in the symbol.

The root-opening size for a groove weld is written in within the symbol indicating the type of
1
weld. For example, a / 8-in root opening for a square-groove weld is specified by

1
And a / 8-in root opening for a bevel weld, not to be ground, is indicated by

In this and other types of unsymmetrical welds, the arrow not only designates the arrow side of the
joint but also points to the side to be shaped for the groove weld. When the arrow has this signifi-
cance, the intention often is emphasized by an extra break in the arrow.
The angle at which the material is to be beveled should be indicated with the root opening:

A double-bevel weld is specified by

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