Cast-in-Place Steel Strap Anchors

[structeng2]

Hello All,

I am looking for any information on the type of anchor shown in the attached image. The building was constructed in the 1960's and has concrete tilt-up panels. These anchors are used for pretty much all of the connections from steel members into the concrete (diaphragm to wall, panel-to-panel, slab to wall, etc.).

I hope there is some literature out there to help me understand these connections better.

Regards,
Peter

 

[KootK]

Ugh. Looks like DIY appendix D from the old days. Unless you can find some relevant testing, I'm not sure how you'd evaluate that. I'd expect shear perpendicular to the straps to perform poorly. Much probably comes down to the extent to which you can "develop" the straps. If they don't pull out or slip appreciably, you could probably claim shear friction between plate and concrete.

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.

 

[bridgebuster]

Perhaps the attached will help; note the last paragraph.

 

[structeng2]

Thanks KootK and bridgebuster for the responses.

I will be adding new connections in these locations but am trying to see if I can assume some small percentage of force being taken by these connections. I won't be able to verify that the straps are hooked around the bars, so without testing data, I think I will have to exclude any capacity from this type of connection.