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13-10. Butt Joints
1
2
1/16 in 30° (1.6 mm)
3 | 4 |
1 Tack Welds
Prevent edges of joint from drawing together ahead of electrode by tack welding the materials in position be- fore final weld.
2 Square Groove Weld
Good for materials up to 3/16 in (5 mm) thick.
3 Single
Good for materials 3/16 − 3/4 in
Create 30 degree angle of bevel on materials in
4 Double
Good for materials thicker than 3/16 in (5 mm).
13-11. Lap Joint
30° | 30° | |
Or Less | ||
Or Less | ||
| ||
1 | 1 |
2 | 3 |
1Electrode
2
3
Weld a second layer when a heavi- er fillet is needed. Remove slag be- fore making another weld pass. Weld both sides of joint for maxi- mum strength.
13-12. Tee Joint
| 1 |
|
| 45° |
|
2 | Or Less | 2 |
|
|
1
1Electrode
2Fillet Weld
Keep arc short and move at definite rate of speed. Hold electrode as shown to provide fusion into the corner. Square edge of the weld surface.
For maximum strength weld both sides of upright section.
3
Weld a second layer when a heavi- er fillet is needed. Use any of the weaving patterns shown in Section
3