Design of a Z-shape Cold Formed Girt

[SKJ25POL]

Can anybody direct me or if they have a simple example of a cold formed beam design?
I am trying to check an existing Z girt clod formed for new loads.
I googled for a very basic cold formed beam design but did not find anything.

I appreciate it.

 

[ztengguy]

check it like any other cold form shape, and substitute the Z shape properties.

 

[JedClampett]

AISI governs cold formed steel design. It's very involved. You need to purchase the AISI North American Specifcations for the Design of Cold Formed Steel Structural Members. There's also a commentary and some design guides. Check

http://www.steel.org.

There's a Cold Formed Steel manual that's pretty good. Unfortunatly, it's going to run into some money.
If you're at very low stresses, you can check it like a normal steel member, but if you're approaching it's limit (and how do you know?), you better get the books.

 

[CELinOttawa]

Try to find the member in manufacturer's tables. It is going to save you a whole lot of work. I had to learn CFS design for a forensic investigation. There are extra failure modes and the formulas are quite complex with a great deal of this-feeds-into-that...

 

[XR250]

There is no such thing as a "simple example of a cold formed beam design".
Either use tables or buy software. The free version of "CFS" might do Z shapes.

 

[SKJ25POL]

ExcelEngineering (Structural), thank you for your direction. Could please give the link, address that has free version of "CFS".
As I guess soundes obvious I am not familiar with this field.

Thanks

 

[hokie66]

Designing cold formed girt and purlin sections is analogous to designing bar joists. In the US, you wouldn't normally attempt to design bar joists, as you have tables to use. In most countries where cold formed sections are routinely used, tables are used which are based more on full scale testing than on analysis.

 

[rjenyoy12]

SKJ25POL, you could try this reference from one CFS Manufacturer.

 

[SKJ25POL]

Does any one know a CFS purlin and girt manufacturer in U.S.?
I also appreciate for a industrial overhead door manufactiurer in U.S.?

Thank you

 

[Bagman2524]

Cold Formed Steel Design by Wei-Wen Yu is a good text reference for Cold Formed steel design

Faith is taking the first step even when you can't see the whole staircase. -MLK

 

[ajh1]

The software that ExcelEngineering referred to can be obtained at:

http://www.rsgsoftware.com/

Excellent piece of software. The free version is obviously limited but should do what you want in this case.