Depth of Embedment into footing required for wall reinforcing terminated using standard 90-deg hook

[CWEngineer]

Trying to get clarification regarding the requirement for the Depth of Embedment into footing required for wall reinforcing terminated using standard 90-degree hook (development of Standard Hook in Tension), per ACI 318-14, para. 25.4.3 (ACI 318-08, para. 12.5).

1. Is this requirement only when you have a hook, such as that provided in sketch 1a of the attached document?

2. Or would it also be applicable when your flexure bar is hooked, but extends a greater length such as that shown on sketches 1b and 2 of the attached document?

Thanks

 

[JAE]

Hook embedment depth per ACI would apply to all three of your conditions. ACI has stated that the additional length of the hook portion doesn’t get you more capacity.

However, there was a thread about this a while ago where there was some who thought that you did get something more but I’m not sure how definitive it was or if it was backed by ACI or peer reviewed testing.

Check out Eng-Tips Forum's Policies here:
faq731-376