Metal Stud Shear wall
Metal Stud Shear wall
(OP)
I'm designing a metal stud shear wall the lateral shear at the top of the wall is about 10 kips. The tension compression couple at the end studs is also about 10 kips. I want to use a gusset plate at the corner (screwed to the sill plate (track stud)) and to the vertical studs. The strap will resist the overturning load. The strap will be screwed to the gusset plate, which in turn will be to studs as mentioned above. assuming the angle of the strap is 45 degrees, how do I design the gusset plate? Do I basically design it for the tension over the projected area normal to the strap? The screws connecting the gusset to the studs are then designed for the lateral shear in the horizontal and tension force in the vertical, correct? Does anyone know where to get shear capacities for #10 screws? I didn't look in my Dietrch metal framing catalog yet, but if there is somewhere someone knows of for sure, let me know.
Thanks,
Thanks,






RE: Metal Stud Shear wall
RE: Metal Stud Shear wall
What's the force in the strap, and the shear force in the wall? 10 kips isn't too bad for a chord member itself but it could prove annoying in your strap.
RE: Metal Stud Shear wall
RE: Metal Stud Shear wall
RE: Metal Stud Shear wall
I am not sure you are following the load path correctly. The 10 kip horizontal force along the top of the wall is resisted by the two diagonal straps (one each side of the wall). The force in the two straps will be about 14 kips, or 7 kips in each strap. The strap should be connected at each end to the track and the doubled up end stud (you could use a gusset plate). The gusset plate should be connected to the sill track (or top track) for the horizontal component of the 7 kip force (5 kips), and to the doubled stud for the vertical component of the 7 kip force (5 kips).
With these large forces, I would use welding, not screws. And keep your gusset plate and strap thickness as thin as possible--it is hard to put drywall over thick gusset plates and straps.
DaveAtkins
RE: Metal Stud Shear wall
RE: Metal Stud Shear wall
Mike McCann
McCann Engineering
RE: Metal Stud Shear wall
RE: Metal Stud Shear wall
RE: Metal Stud Shear wall
RE: Metal Stud Shear wall
If you don't have a foundation wall, either use a spread footing as you mentioned or use the strip footing to spread the load along the 5' or so required (2'-6" in each direction).
DaveAtkins
RE: Metal Stud Shear wall
#10 screws shear capacity on 16GA stud will be 629#.
RE: Metal Stud Shear wall