Figure 3-24.Additiona1 types of groove welds.
angle, use the correct root opening, and use the correct
root face for the joint. When you follow these principles,
you produce better welds every time. Other standard
grooved butt joint designs include the bevel groove,
J-groove, and U-groove, as shown in figure 3-24.
The flush corner joint (fig. 3-25, view A) is de-
signed primarily for welding sheet metal that is 12 gauge
or thinner. It is restricted to lighter materials, because
deep penetration is sometimes difficult and the design
can support only moderate loads.
The half-open corner joint (fig. 3-25, view B) is
used for welding materials heavier than 12 gauge. Pene-
tration is better than in the flush corner joint, but its use
is only recommended for moderate loads.
The full-open corner joint (fig. 3-25, view C)
produces a strong joint, especially when welded on both
sides. It is useful for welding plates of all thicknesses.
The square tee joint (fig. 3-26, view A) requires a
fillet weld that can be made on one or both sides. It can
be used for light or fairly thick materials. For maximum
strength, considerable weld metal should be placed on
each side of the vertical plate.
Figure 3-25.Corner joints.