Interesting discussion, I have not heard about this idea before. If anyone has done it with IBC or ASCE 7 load cases I would be interested in how you did it
I’m commenting to ask if you can update us if/when it gets published. I would be interested to see if it would be useful for my work. I’d also be willing to look over it before you publish to see if I can spot anything major
It uses Chapter 15 SOMF with permitted height increase. The frame was built well before AISC 341 was a thing, so it does not meet any special detailing requirements.
Mikek36, both your points are spot on, which is why I am asking. The higher forces would require a reinforcement, while the smaller ones would not. Additionally, the rack is also repeated many times, so that is correct that it wouldn’t be cheap to reinforce.
JLNJ, the pipe rack is a moment...
I am looking at a pipe rack that is going to add a new pipe with ASCE 7-16 loads. There has been discussion in my office about how to apply the non-structural pipe loads to the rack. Because it is ASME piping, the R factor per ASCE 7 Chapter 13 is 12. This compares to the R factor of 1 for the...
I am wondering if other engineers use safety factors on the 2021 IBC presumptive load bearing values or overturning checks. Everyone at my office just uses a 1.5 safety factor on all overturning, sliding, and soil bearing checks, but I am wondering if that is too conservative. No one was able to...
Thank you! This made the most sense.
Agreed, the article states this as well. I recommend giving it a read. They mention that it is not the design to pick if you are controlled by buckling, but mainly controlled by deflection.
Another interesting thing about the article is the middle node is...
I came across the article "Evolution of the Braced Tube" by Structure Magazine that shows the 800 Fulton Market in Chicago as having an X brace with the center of the X shifted up. The article states that when the members are deflection controlled this is more efficient, but doesn't get into...
My understanding of the topic is that yes you can (kinda), but the current research/understanding is still somewhat limited. The best reference I have is going to be ACI 318-19, Section 17.5.2.1, however this is fairly strict and requires for an all or nothing approach. They also talk about it...
