Steel Stud Shear Wall - Slip track over regular track

[Signious]

Good Morning,

I have a steel stud shearwall system with diagonal strapping being welded to a solid top track; I would like to use a slotted top track to allow for deflection in the roof and transmitting forces between the shearwall and the diaphragm. Does anyone have any product suggestions for me? I don't want to throw the spec onto the contractor without having at least some suggested product I know will work.

Still waiting to hear back from Clark Dietrich if their slotted tracks have enough room to fit over a 10gauge top track.

thanks!

 

[dik]

Too tricky... can you secure the wall and track at a location near supports where there will be little deflection?

Dik

 

[Signious]

L-shaped wall; could work at the ends but where the two legs of the L meet are very near a pretty long truss with some significant (a little over an inch) deflection. The nuclear option is to extend an HSS column 30' up - but that comes with it's own can of worms.

 

[jayrod12]

I'm not sure it's even possible to have a slip tracked shear wall. At least I haven't seen one.

 

[structSU10]

There is a slide connnection called the quick clip by clark dietrich for bypass stud walls (see attached, page 24)

For framing under a member, I cant think of anything.

 

[Signious]

@structSU10

That wouldn't work for me, but it does give me an idea - Once I hear back from Clark Dietrich that the track won't fit I could use bridging at the top near to the top of the studs as the connection point for my cross bracing and then use a standard slotted slip track for the roof connection at the top of the studs.

 

[KootK]

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.

 

[XR250]

How is the load getting into the shearwall? i.e. what part of the roof structure are you attaching to? Are you attaching directly to the roof deck or to some other framing member.

 

[Signious]

@XR250

The load is being dumped into infill roof purlins, I believe the plan is to puddle weld the purlins to the decking.

@Kootk

I like that detail, thanks

@JayRod12

Clark-Dietrich will make us a thicker slip track on special order for this product, numbers check out for what we need it to transfer.

 

[NorthCivil]

sounds a bit weird to me. what takes the gravity forces on this building? some sort of beam-column arrangement? why not turn that into a frame and have your steel stud walls act as partitions & take windload only

 

[Signious]

@Northcivil

-Wall is L shaped, shear forces are due to interior wind load on the adjacent leg of the L shaped walls

-Force path through the building is: wind shear from wall -> Diaphragm -> 'actual' exterior shear walls -> foundation

-Building roof loads are handled by some monster 35m HSS trusses; no structural framing anywhere near the wall.