Metal Builidng Column Reaction confusion. GO figure right? 3

[JStructsteel]

So I have some confusion on metal building reactions. It says "Building reactions are shown in the sketch, foundation loads are opposite. They show a sketch for rigid frames, H are to the right, and V is up. So Positive H reaction is outward, and positive V reaction is downward. Would that also pertain to the endwall columns? They dont give a sketch for endwalls.

My second question is about endwall reactions (Not the frames, and it may answer first part too). See attached. For Column C, left column at line 1 I have H = -3.0K for the Wind_left1 case. Wind Press Horz is -5.7K. Would these be added together? If so, I would have 8.7K inward thrust and -14.7K uplift for that column correct? Next is the Wind suct horz load, is that an interior load on the column? Subtract that from my 8.7K inward reactions?

the Wind suct horz and Wind Press Horz dont change signs for the opposite side column, so I am torn on how that is applied. Why for instance at Col line C at the left column the Wind Press Horz inward, but on the opposite side its outward? The Wind_right1 horizontal reaction does change sign, so it makes sense on the right side the load is inward.

Thanks in advance. [URL unfurl="true"]https://res.cloudinary.com/engineering-com/image/upload/v1692238171/tips/End_Wall_Column_Reactions_aicuch.pdf[/url]

 

[bones206]

On the last PEMB foundation I did, the preliminary design package had no enveloped reactions - just hundreds of individual reactions for each load case. There were no load combinations listed and there was no explanation as to what each load case represented. Many load cases were cryptic like F1_PAT2, F1_PAT3, etc. When I requested clarification and enveloped reactions, I received a flat no from the metal building supplier. It was actually more like "we don't have a contract for the final design yet, so this is what you get, don't contact us again". They even went out of their way to lock the pdf so I couldn't copy and paste the reactions into a spreadsheet. I spent several days doing manual tabulations just to come up with design loads for the foundations.

Never got enveloped reactions, but the foundations were designed and and the building was built. We just didn't make ANY money on that job.

 

[ntattose]

I have had this happen also. Now my construction notes state that the PEMB supplier provides reactions for each load case, the MAX and MIN reactions all in ASD, and they are required to match my grid lines. This seems to work out well, but you usually can't get reactions until a contractor has been chosen.