Wood truss repair fame
Wood truss repair fame
(OP)
After six years in a wide range of construction fields and 25 years out of construction, I'm adding a 2nd floor to my house. I've framed it and am ready to roll roof trusses. Truss company delivered 2/12 single-pitch trusses for roof, and two turned out to be just about exactly 2 feet short (16' instead of 18'). Truss designer admitted his mistake and ordered repair frames, which arrived on site today.
I'v never used repair frames before. They're just about 6' long, overlapping the "too short" trusses by 4'. My natural inclination would be to face-nail the overlapping sections together and then add a 2x4 scab to the side of the repair frame along the top chord for the last two feet to extend the line of the original truss and provide backing at my sheathing seam.
Am I talking thorugh my hat here?
I'v never used repair frames before. They're just about 6' long, overlapping the "too short" trusses by 4'. My natural inclination would be to face-nail the overlapping sections together and then add a 2x4 scab to the side of the repair frame along the top chord for the last two feet to extend the line of the original truss and provide backing at my sheathing seam.
Am I talking thorugh my hat here?





RE: Wood truss repair fame
RE: Wood truss repair fame
Interestingly, he has not run into this before, in spite of over 50 years structural and forensic practice, and having designed some of the landmarks in our town.
Checked my 33 pages of calcs and drawings, like you suggested, and they are generic, only specifying a repair for floor trusses, and not gable or mono (like mine) roof trusses. I will call the designer in the AM and see if he has specs for this. Anyone who has actually done this in the field is more than welcome to chime in...
Thanks again.
RE: Wood truss repair fame
RE: Wood truss repair fame
Seems this truss company uses a sub do make repair frames, and expected the sub to deliver my wets. I got them faxed, and the repair notes are exactly as you and I figured, minus glue, but with the 10d nails @ 3" o.c. (same as two lines on 6". Thanks again. Looks like I'm good to go. I'm still using glue.
RE: Wood truss repair fame
As per the above truss concerns, I want to know what kind of glue should you use on the face of those trusses?
THanks,
J.
RE: Wood truss repair fame
RE: Wood truss repair fame
RE: Wood truss repair fame
There are others...
The reason for an AFG-01 adhesive is that it remains "permanently" flexible but very hard, and so is less likely to have the bond broken by bending and twisting moments - and so is better under wind and seismic loads than an adhesive which dries brittle or frangible. A good one will exceed 450 PSI shear reistance, bridge gaps of a cm or better, etc.
boo1, you are 'way too attentive ;^) - thanks for clearing that up.
RE: Wood truss repair fame
RE: Wood truss repair fame
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RE: Wood truss repair fame