Metal Stud to Track Connection - Out of plane wind loads
Metal Stud to Track Connection - Out of plane wind loads
(OP)
Can anyone give me some information on how to calculate the capacity of a metal stud to track connection for out of plane windloads.
I would like to eliminate the use of angles or clips if possible.
Thanks in advance
I would like to eliminate the use of angles or clips if possible.
Thanks in advance






RE: Metal Stud to Track Connection - Out of plane wind loads
RE: Metal Stud to Track Connection - Out of plane wind loads
'Lateral Strength of Wind Load Bearing Wall Stud-to-Track Connections', Year 2000 Proceedings of International Specialty Conference on Cold-Flormed Steel Structures.
You may be able to get a copy of this from a manufacturer's engineering dept. Another good source may be the Cold-formed steel engineer's institute. www.cfsei.org
For data on deflection tracks, you can find technical reports published by the Steel Stud Manufacturers Association. www.ssma.com.
RE: Metal Stud to Track Connection - Out of plane wind loads
The tributary width for the track leg is 3.5 times the height of the track leg (which is usually 1.25"), plus the width of the stud. As noted above, if this doesn't work, use a heavier gauge track or assume the screw at the leeward track leg helps.
The other thing you can do is not assume the load is applied at 1/2 or 1/3 of the track leg height, but rather is applied at the centroid of the required bearing length based on web crippling in the stud.
DaveAtkins
RE: Metal Stud to Track Connection - Out of plane wind loads
I orginally used the proceedure that Structural EIT mentioned with one flange of the track in bending and an effective flange width 3X the flange of the stud. I then calculated the stress by using the formula M/S. I compared the actual stress to the allowable stress = 0.70 x fy.
My result was a 12 gauge track (600T125-97 50ksi). Can anyone tell me if this seems excessive for a wind velocity of 150, exposure C, 12.8 ft tall wall?
RE: Metal Stud to Track Connection - Out of plane wind loads
But if you use the standard web crippling equations that will work too.
RE: Metal Stud to Track Connection - Out of plane wind loads
There are too many variables for us to check your work. Is this stud near a corner? What is the internal pressure? Mean roof height? I could go on and on.
DaveAtkins
RE: Metal Stud to Track Connection - Out of plane wind loads
I understand. At the corners I am using angles. My interior zone component and cladding pressure is 64psf.
Stud 600S250-54-50ksi @ 16" on-center
Curtain Wall Hieght - 12'-10"
Lateral Bracing @ 4' on-center
At the stud head I'm using a light gauge track and deflection angles
The bottom track is what I need to design. I have calculated that I need a (600T125-97 50ksi).