I designed trusses for 18 years for a local truss company. I say designed what I mean is I input the information and the truss plate manufacturers software analyzed it. Then it was sent to the engineering department for them to stamp. Around here the building departments WILL NOT let you build your own trusses. What grades of lumber you use has as much to do with the strength as the webs do. Most lumber yards do not carry much stress rated lumber, #1 or #2 etc. Standard and better grade is what most carry and is not allowed in the chords of the truss. Stud grade or better can be used for webs though. I don't know if a truss company would sell you the truss plates if they knew what you were doing with them. I don't know where their liability ends where they would not have built the trusses. Simpson Strong Tie makes a plate that looks like a truss plate but it is stamped NOT FOR TRUSSES right on the plate. They don't want the liability either. Part of the price covers the engineering on the trusses. I have done many repairs on trusses that were damaged some how. The little truss plate would be about a 12" x 12" plywood gusset with a pot load of nails in it. The engineers won't allow you any value for adhesive because they can't control how that is applied, only nails or screws(not grabber type screws either, they are too brittle and have no shear strength). The decision is yours alone so be careful whichever you do.
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Today's Featured Article - The Day Mom Drove the 8N - by Brian Browning. My Dad was wanting to put in a garden but couldn't operate the 8N and handle the old horse drawn plow he had found and rigged up to use with the tractor. Well, he decided to go get Mom out of the house and have her drive the tractor while he walked behind the plow. You got to understand that while my Mom is a hard worker who will always help whenever she can... she had never operated farm machinery before that day. Dad got her out there, explained how the clutch was the same as in our o
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