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I usually create a RISA model when analyzing two-way slabs for penetrations. I use RISA to determine the maximum shears and moments then compare those values with the slab strength. Very easy to do! Regarding the mislocated holes, I would model those penetrations also and see if the slabs is...

I would agree with your statement. We have specified a concrete mud mat, lean concrete would probably be an equivalent description. Pretty much it would be working slab to allow for construction of the pile cap. Good luck. Gabriel Molina, PE

Thanks for your tips. We were able to track it down to Columbus McKinnon (CM). So we are closer, unfortunately, they have not been too much help on identifying the model/capacity of the hook. One other letter we are running into is "Y" and it appears to be a manufacturer's mark. They have all...

We are in the process of inspecting lifting devices (visual and NDT) for a client. We are trying to identify some of the hooks in order to determine if the hook has the minimum identifying information on them. Is there anyone here familiar with hook ID and manufacturers? For example, we have...

Thank you for all of the responses. We have resolved the source of the erosion, but were just looking for alternatives for the fill. Thanks again.

I am looking for alternatives to filling an area where soil has washed out from under a pre-cast stadium seating stand. Approx. 2 cy of soil has washed out around each of the concrete columns (which are supported on piers). In total about 30 cy of voids will have to be filled. Other than...