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3-17. Welding Overhead Butt Joints And Tee Joints
.
When welding overhead,
gravity may distort the mol-
ten metal.
.
This technique is not
suitable for all electrodes.
1
Electrode
2
Backing Strip
Welding overhead is the most dif-
ficult welding skill to master.
When welding overhead, use a
welding motion that draws arc
out and slightly away from the
crater to allow weld puddle to so-
lidify.
When weaving is necessary, use
the pattern shown.
Bevel edges if warranted by ma-
terial thickness (see Section
3-11). Tack weld a backing strip
to the plates to make the first
weld pass (root pass) easier.
804 260
1/2 in (12 mm)
90
°
15
°
90
°
30
°
Direction Of
Welding
1/2 in
(12 mm)
1/2 in
(12 mm)
Direction Of
Welding
Electrode Position
Direction Of Welding
Welding Patterns
2
1
Butt Joint Weld
Tee Joint Weld
Draw arc out and away
from crater to let weld
puddle soldify.
Overhead Welding Technique
1
2 3
Sequence Of Multiple Weld Passes
First Weld Pass
Subsequent Weld Passes
