Lightgage truss to concrete bearing wall attachment
Lightgage truss to concrete bearing wall attachment
(OP)
What is the typical detail for attaching the two? Continuous embed plate? Plain concrete and they drill in a tapcon. Assume there's some uplift on the truss connection but no more than 400 lbs.






RE: Lightgage truss to concrete bearing wall attachment
I would usually try to get the truss on top of the wall and avoid the eccentricity and messy shear connection.
RE: Lightgage truss to concrete bearing wall attachment
RE: Lightgage truss to concrete bearing wall attachment
But for steel trusses there are also clips that go directly from concrete wall to truss. Go to Simpsons or USP web sites.
Some local codes have minimums - you better check.
RE: Lightgage truss to concrete bearing wall attachment
RE: Lightgage truss to concrete bearing wall attachment
However, I typically no longer call out these connections, as there are so many proprietary truss profiles out there (C-shaped, U-shaped, tubes) that it is impossible to know what type of strap or clip to use, as you have no idea what the shape of the truss chord will be, unless you are designing the truss out of standard stud shapes.
So whenever I delegate the design of light gage trusses (which is almost always), I also delegate the design of the conenction of the truss to the tie beam. That way, the truss manufacturer can use his standard details, and I don't have to guess at something which may not work.
RE: Lightgage truss to concrete bearing wall attachment
Chances are that the contractor will want to change it anyway.
Mike McCann
MMC Engineering