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Longitudinal wind load on piperack

Longitudinal wind load on piperack

Longitudinal wind load on piperack

(OP)
Hi,
I have a pipe rack of 60 meter in length, width 4 meter and height of 3 m. Frames are spaced 10 meter along the length.
I applied longitudinal wind load on the columns and beam of the frames which are spaced 10 meter apart. American petrochemical guideline says a judgement has to be used by engineer.
Please advice me the correct procedure for longitudinal wind load on piperack.

RE: Longitudinal wind load on piperack

Not sure what types of piping temperatures you are dealing with, but in general, it is better to keep the braced frames near the center of the pipe rack's length (to prevent thermal issues). Other than that, I would pick a brace size and add it to a viable location along the rack and give it a try! If your drifts and strength checks are good, you're likely headed in the right direction. Check with a more senior engineer before you get too far along.

http://www.structuremag.org/wp-content/uploads/201...

RE: Longitudinal wind load on piperack

In these situations, I'll pretend that the pipes can be represented by a solid roof plane tilted at 15 degrees to the oncoming wind. The codes of some countries actually give guidance for wind drag of this sort. Australia is one of them I believe.

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.

RE: Longitudinal wind load on piperack

I had honestly never had problems with longitudinal wind forces in the past (assuming each frame is connected, and not of the cantilevered column sort). I make sure every transverse frame is hit with longitudinal wind and never worried about drag on the pipes...not saying what I did was correct though.

I like RISA in these situations, as the area load function allows application of wind load to the projected face of the structural members. I believe it also updates the effective area automatically as member sizes are changed.

RE: Longitudinal wind load on piperack

Remember to coordinate with the pipe expansion mechanisms if you have big pipe. Sometimes that says where your longitudinal restraint has to be.

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