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CFS Shear Wall

CFS Shear Wall

CFS Shear Wall

(OP)
I've researched Dietrich, The Steel Network and Simpson for products and components.

The building is 60'x100' rectangle with bump-outs. OWSJ on mild-steel frame. CFS stud in-fill.

I've got 17' tall exterior walls (with 3'-0" parapet), loaded with small windows that are not conveniently stacked above each other. It appears that my walls are too high for the Simpson Strong-Wall. Further, I do not want to have the contractor to "thread" steel rod through the studs. I believe the best route for wind shear is the continuous strap with gussets and holdown anchors or tension ties to foundation at the perimeter studs.

In the few pictorial or photo examples I see in the literature researched, I notice that the strap and gussets are on BOTH sides of the CFS stud walls. Is this typical? Recommended? Required? (Please provide AISI Spec. reference, if so - I don't see it.)

Can anyone recommend resources or methods other than what is specified above?

Thank you all!

RE: CFS Shear Wall

Is it a two story building? What is the floor material of the second floor? I typically use conventional holddowns at the ends of the walls to transfer the uplift forces and then coil straps along the interior for the prescriptive uplift requirements. It has never been an issue with the installation at both composite floors and wood sheathed floors.

For flat strap braced walls, the shoe is typically welded to the side of the stud that accepts the brace.

RE: CFS Shear Wall

Are you referring to an X-Braced or strapped wall, using CFS? If so the strap braces may be on either side although it is recommended that you account for the moment due to eccentricity if you will place the strap only one side (i.e. a moment on the chord stud = strap force x 1/2 stud depth). A good reference is here:
http://www.aegismetalframing.com/assets/pdf/Steele...

When you say infill - you mean the CFS wall is not load bearing but it is responsible to resist lateral forces?

EIT
www.HowToEngineer.com

RE: CFS Shear Wall

I have seen one-sided X-braced walls, however i have always designed mine as two sided per RFeund logic. only once was it one-sided and i spent too much money anaylizing and detailing it. Deitrich i think even sells little gussets for these frames and some software (TSN has a nice design software but it now costs money) will analyze this braced frame for you.

RE: CFS Shear Wall

Do you always use gusset plates? I actually just use the shoes that weld directly to the stud and it's not too bad to detail or design at all. Steel Smart System actually does it pretty fast.

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