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Hello, i recently found this playlist on youtube https://www.youtube.com/watch?v=2fez4bu21IQ&list=PLMM8WIL_FdYoZLLJgnlOSsWG2OlrmoW5m This is a playlist with Lectures from Marshall University (i think). And i was wondering if anyone knows about other college/University lectures available on...

Thank you very much!

I have no problem with the strength, because, as you point out, it's small. The AISC design guide 7 points out that the stiffness controls the design when the the stiffness is not derived from axial stress only. As my purlin has also a wind load, I suppose the stiffness might control the design.

Hello :) I have a column, and i want to considering the purlin as bracing. I'm using AISC 360 Appendix 6, to check if the purlin is strong enough. From this Appendix I get a stiffness requirement.. and I'm not sure what i should use for comparison? Maybe the axial stiffness of the purling? EA/L?

Can a building be considered both partially enclosed and enclosed? When where I see it, the A0 in the formulas, is the openings area in the windward wall, and in that case I could have a different classification for each direction. In the image i show, i think i should consider and internal...

Thank you all!

Hello, yes! my bad.. it's a welded section. Can i designed it with the box formulas?

Hello, I have a box section consisting of 2 c-section connected with bolts. I have to designing according to AISI code. Should i do every section individually or consider it as a box section? Is there any examples to look up for reference (any code is welcome)? Thank you in advance :)

I just realized that *facepalm* and was trying to delete the post.. Thanks :)

Hello, i'm following the AISI Manual Cold-Formed Steel Design (2002) examples. When calculating the Ia parameter, it limits the value to 0.0016 inch^4. I cant find this limit in the specification. Does anyone know where it come from? Thanks in advance.

Exactly, for net section tension check i was using the channel formulas. Thanks for your answer!

I'm not having trouble, i just find it odd that there wasnt any examples. In some manuals you can see an uncutted w shape connect to the gusset with angles, that seem a little too much for a simple connection.. and that make me wonder if maybe my solution wasnt allowed for some reason.

Hello, i'm looking for a design example of a gusset connection in a W shape. The thing is.. we cut the beam as is shown in the picture. Is there any example of this solution? Do you use it in your projects? Thanks in advance.