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"I think you're right, the pipe rack category sounds good to me. That will get you R=3.25 then, right?" Because the height of pipe rack is 51.5m, I think I can only use R=1.5 for my case. For Detailing Requirements, what is the difference between AISC 360 and AISC 341? If I am designing the...

Thank you for your reply. If I use table 15.4-2, the structure will be non-building structures not similar to buildings. Then according to 12.3.4.1, I can use rho=1.0, is it right? But for pipe rack, in 15.5.2, pipe rack is taken as non-building structures similar to buildings, also in the...

The structure is like a pipe rack. What do you think about the R value and redundancy factor of the structure? Thanks.

Thank you for your quick reply. So you think we should follow ASCE7-05 section 12.3.4 to check the value of redundancy factor?

Dear experts, I have an important question to ask about the redundancy factor r. We are designing steel structures only in elastic range. According to ASCE7-05 table 15.4-1 we are considering a response factor R=1 for nonbuilding moment frames similar to buildings. As for the redundancy...