- Carbon content of the bars should not be more than 0.5 percent.
- Use only low hydrogen electrodes AWS class E7015 or E 7016.
- Do not weld within 8 inch of any cold bend.
- When pre-heating is required, the surface where the weld is being deposited must be at or above the required pre-heat temperature. Preheat for a distance of 3 inch in all directions from the point of welding.
- Tack welding of reinforcing bars in connections should not be permitted unless indicated by the design.
Design of Welding for Reinforcement:
The ultimate strength of reinforcement welds is determined by:Fig: Welded cross bar anchored
Fig: Reinforcement welded to plate or angle
Fig: Reinforcement bars welded together