anchor rod in tension embedded in concrete

[bjcure]

For a threaded anchor rod in tension, embedded in concrete, ACI 318 Appendix D gives methods to check the steel anchor failure as well as various concrete failures (breakout, etc.).

But is it necessary to check the washer bearing on concrete? Are standard washers sized so that they always work for bearing (if so, for what concrete strength)?

In this case, I am wondering about a 1 1/4" diameter F1554 Gr.55 anchor with double nuts, and a standard washer conforming to ASTM F436 (washer diameter 2 3/4")

 

[dik]

Does not the ACI code allow an overstress for bearing based on the ratio of the bearing area over the gross area?

Dik

 

[ToadJones]

PMR06-
Yes, We have our own equipment and there isn't a chance in hell I'd put a piece of HSS in the machine!!!!!
The equipment is not cheap and a piece of HSS would guaranteed max out the machine and damage it.