Reinforcement at continuous footing corners

Question:

How does the footing reinforcements work at corners?

Answer:
Per code the reinforcements at corners of continuous footing need to be continuous. This can be accomplished by using corner bars as shown on detail 22. Each leg of corner bars must be greater than or equal the splice length which is 40*bar diameter. For #4 bars, the splice length is 40x.5 inches = 20 inches long



Notice the corner bars on the right are extended to the outer reinforcements. There is no code requirement for this but it will provide a stronger connection than if we were to tie in to the nearest bars.

Hope this helps
Tonga