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Strut Bracing in Portal Frame Sheds

Strut Bracing in Portal Frame Sheds

(OP)
When designing a hot rolled portal frame shed, we are required to design bracing for longitudinal wind in the form of a simple truss with struts and angle ties etc....EASY!!! Can someone please tell me why no engineering that i have seen for cold formed sheds seem to make allowance for this? No ridge/eave struts whatsoever, just x-bracing etc. Im curious to know why this would be. When I have been in contact with some of these shed manufacturers they confirmed that they never put in any ridge/eave struts in their sheds. The shed suppliers are part of the shed safe program.

Is there any information that anyone might have regarding this?

RE: Strut Bracing in Portal Frame Sheds

Purlins (c and Z section/tophats) can be designed to take compression. These are normally design to act as the struts in cold formed steel. With cross bracing connection to these, Stramit provide a program that you can easily accomplish this with exfacta purlin's.

the shed safe only applies to a limit range of sheds so only sheds up to this size have been reviewed in the third party review system.

As for if you are required to provide eave and apex struts in a hot rolled portal frame that is up to engineering judgement.

http://www.nceng.com.au/
"Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning."

RE: Strut Bracing in Portal Frame Sheds

(OP)
thanks rowing. will get onto stramit.

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