Welding Guide

Electrode Type:

Under-matching strength electrodes are preferred, but matching strength may be used.

Weld Length:

This should not be less than the size of the smaller bar.

General Notes:

These are usually used for positioning and holding purposes, and in prefabricated elements. They must not be used for lifting purposes unless prior approval has been obtained from the design engineer. They do not affect the strength of Grade 500.

Electrode Type:

Matching and under-matching strength electrodes may be used.

Weld Length:

Minimum total weld length is 5d.

General Notes:

The short length of conventional double sided lap splice welds may cause excessive rotation at the splice when loaded in tension, and thus contributes to concrete spalling. Longer weld lengths than that required to develop full strength have therefore been recommended. This tendency to rotate can be further minimized by forming the weld in two parts as shown, thus increasing the effective geometric length. In this case, the gap between lap welds should not exceed the total weld length.

Electrode Type:

Matching strength electrodes are essential to develop full strength in the butt weld.

General Notes:

Observe 2000 C maximum interpass temperature by allowing weld to cool between runs, particularly towards end of welding.

Electrode Type:

Matching and under-matching strength electrodes may be used.

Weld Lengths:

Matching strength electrodes: 8d • Under-matching W50x (E48xx) type electrodes: 9d • Under-matching W41x (E41xx) type electrodes: 10d.

General Notes:

Single sided lap welds, because of their greater length, have less tendency to rotate, but should only be used with the permission of the supervising engineer when access to the second side is not available or impractical. These welds may also be formed in two parts as shown, provided total weld lengths noted above are used.

Electrode Type:

Matching and under-matching strength electrodes may be used.

Weld Lengths:

Matching strength electrodes: 8d • Under-matching W50x (E48xx) type electrodes: 9d • Under-matching W41x (E41xx) type electrodes: 10d.

General Notes:

Single sided lap welds, because of their greater length, have fewer tendencies to rotate, but should only be used with the permission of the supervising engineer when access to the second side is not available or impractical. These welds may also be formed in two parts as shown, provided total weld lengths noted above are used.