TEK Screws In Deflection Track / Slip Connection
TEK Screws In Deflection Track / Slip Connection
(OP)
I see CFS (Cold Formed Steel) studs fastened to deflection top tracks with TEK screws.
In a deflection situation, where the TEK screw will experience frequent movement, wouldn't the typical TEK screw (without washer, nut and deformed threads) work its way loose over a short period of time?
In a deflection situation, where the TEK screw will experience frequent movement, wouldn't the typical TEK screw (without washer, nut and deformed threads) work its way loose over a short period of time?






RE: TEK Screws In Deflection Track / Slip Connection
RE: TEK Screws In Deflection Track / Slip Connection
RE: TEK Screws In Deflection Track / Slip Connection
I agree with Ron, it likely rarely gets used, but we have to specify it since it is now standard practice.
RE: TEK Screws In Deflection Track / Slip Connection
This surprises me. You guys don't expect to see real differential movement taking place in the primary structure above?
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.
RE: TEK Screws In Deflection Track / Slip Connection
RE: TEK Screws In Deflection Track / Slip Connection
With potential joist deflections of 1.9", i certainly expect some vertical movement.
wannabe... what benefit would a wafer head have? Are they unable to reverse direction and work their way out?
XR250... I considered the deep deflection track with no screws or clips, but, with potential lateral deflection of 1.25" along with potential uplift, I definitely want some positive connection.
Thank you all...
RE: TEK Screws In Deflection Track / Slip Connection
RE: TEK Screws In Deflection Track / Slip Connection
Further, the exterior finishes are usually attached rigidly to the CFS framing system, thus if there were much deflection in the track you would see evidence of distress in the finish/cladding system (except brick veneer)
RE: TEK Screws In Deflection Track / Slip Connection
RE: TEK Screws In Deflection Track / Slip Connection
RE: TEK Screws In Deflection Track / Slip Connection
With that much deflection allowance you have alot of eccentricity on the track legs which causes a moment in the legs, and in the track web where it is shot to the structure. Make sure you take this into account when sizing your track - especially at window and door jambs. I would be using deflection clips in this instance such as an SL600.
As far as the deflection track getting exercised, I agree with Ron and OldBldgGuy. I never see any details for the interior or exterior finishes that address the potential movement across the joints and have never heard of any issues in my 25 years.
RE: TEK Screws In Deflection Track / Slip Connection