Chris Snider's Communities Activities

Lateral loading on angled building

Chris Snider — Tue, 02 Jan 2018 21:37:49 GMT

I've got a building that is in two parts - one orthogonal and the other at 45° - but they are connected and act together. Do I have to run the orthogonal portion, assign frame sizes, etc, and then rotate grids 45° to run the second portion of the building?

RAM Foundation reinforcing question

Chris Snider — Mon, 21 Aug 2017 14:04:42 GMT

I have a fairly small, lightly loaded foundation that Ram Foundation is saying needs an excessive amount of steel - unless I'm missing a reason why.

ACI318-02, DL = 23.21k, LL = 22.99k, Lr = 4.26k

It is telling me that I need 4.06 sq in of steel per Section 7.12 (Shrinkage and Temperature).

Am I missing something here? (Also, on my larger, heavily loaded footings, it is also saying 7.12 is the code reference for design here too when moment is controlling this one.) Is this just a bad reference?

Ask A Question I

Wed, 02 Aug 2017 19:54:05 GMT

Ask a question in a forum.

RAM Frame and large cantilevers

Chris Snider — Wed, 02 Aug 2017 19:54:05 GMT

I have a stadium project that I'm designing that has a cantilevered roof of approximately 23'. Gravity loading is easily accounted for, but my concern - especially with the large cantilever - is what wind loading is RAM Frame applying. I believe that it is applying the load based on the vertical projection of the building and does not account for the MWFRS uplift on both the top and bottom of the canopy (as well as the uplift on the remainder of the roof). Is this correct?

If it is, I was planning on calculating the MWFRS loading, apply it as a nodal load to the tip of the cantilever and add it to my load combinations. Is this likely the most appropriate way to account for the load?

Any help would be appreciated.