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Fixed base columns

Good point! I had a snug tight note on my other through bolt connection (not shown) but forgot to add it on this one. thanks!

No, I don't need three bolts and you are correct, more driven by geometry. Two just looked a little small to me given the geometry. Yes, I had considered,but the customer wanted to try to avoid as much welding in the field as possible. Given the configuration of the structure most, if not...

I am considering a couple unusual connections for a small steel framed pergola with light loading. Have any of you ever designed a narrow tee connection to an HSS subject to shear and axial load? The worst case loading will be light, only 3.4 kips of shear, and 1.72 kips of axial load. See any...

phamENG, Thank you for the response. One more question if you don't mind. I am in the Northeast US where frost is a concern. Do you know if it is common to put insulation behind the wall in frost susceptible areas? Thanks

I am probably opening up a can of worms here but I am re-evaluating how I am doing my foundations around dock doors. I am curious about details that performed well and not-so-well for you guys, your design approaches, and any other comments/suggestions you may have. For instance... 1) Do you...

That makes sense. Thanks!

I was looking through AISC Design Examples Version 14.0 page IIA-104 and I am stumped on where the 4.5 and 1.5 values are coming from in their calculation for Znet at the top of the page. Can someone help me out on this one?

We were planning to reduce the depth of the HSS section over the girder a little further and use a 3/4" shim pack to give some clearance under the slab/deck. According to laser measurements there is about 3/8" of variation so that should give us the flexibility we need. They wanted to try to...

I need to notch an HSS beam to sit on an existing girder and fit under an existing deck and slab. I am planning to use the attached detail. Other than checking the beam action of the reduced section for bending and shear and then developing the plate into the HSS itself is there anything else...

That is good advice from atrizzy and structSU10. One thing I would add is that older PEMB's were designed a little more conservatively than modern day ones. The older buildings truly were "pre-engineered" for a variety of conditions so parts could be pulled off of a chart. Nowadays they are...

Hi all, I am looking for input on the best detail to use for a covered porch foundation. We will be using a slab on grade which will sit on a ledge in the existing concrete wall at the house side. At the outside I was originally planning to use a strip footing with block wall and over pour the...

Is it common practice to consider aluminum grating attached with screws and saddle clips as bracing the top flange of the supporting framing?

Ah, wasn't aware of that forum. Thanks for the tip.

Thank you Ron, that is my understanding as well. In this case the license is for a company and not an individual but your advice still applies. I would definitely keep my statements true and limited to my personal knowledge. Thanks again.

Would it be considered a conflict of interest or in conflict with engineering ethics to allow a client to me as a reference for a Contractor's License in another state? The form appears to be set up for an individual but I am the only engineer in my company and the owner. I had initially...

Ok, it looks like removing them from a new model and saving it will accomplish my first question. Apparently I was not doing it right the first few times I tried. Curious if there is a way to just regenerate the default AISC database to "freshen" it up it case I accidentally deleted any...

I have accidentally added a number of shapes to the permanent RISA shape database. Is there a way to remove them yet still leave them intact on the model files where they are used? Also, is there a way to make modifications to the RISA shaped database outside of RISA? I have a project were I...

Lomarandi, yes this is a linear taper from 18" to 42" and back to 18". StructSU10, per your suggestion I put a quick spreadsheet together (see attached) based on the equations in this document: https://ascelibrary.org/doi/10.1061/%28ASCE%290733-9445%282008%29134%3A9%281487%29 The blue line is...

At the 18" depth it does at the 42" depth it does not.