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Technical Paper
Thursday, April 3, 2025
SBCA Knowledge Center
Floor Trusses with Masonry Bearing Walls TF No. 1085
We would like to know if there is a problem with using wood floor trusses with masonry bearing walls without a ledger. Our local supplier has told me that encasing the wood truss in the masonry wall could be detrimental to the truss due to moisture.
Technical Paper
Thursday, April 3, 2025
SBCA Knowledge Center
Long Term Performance of Metal Plate Connected Wood Trusses TF No. 1088
How do trussed roofs perform in long-term service? Are there any reports of rusting in the nail plates, rot/insect attack, do-it-yourself modifications, or condensation and ventilation problems in the attic?
Technical Paper
Thursday, April 3, 2025
SBCA Knowledge Center
Allowable Variances in Trusses TF No. 1089
My framers are always complaining that the “trusses are bad.”
Technical Paper
Thursday, April 3, 2025
SBCA Knowledge Center
Manufacturing Tolerances TF No. 1104
I am a structural engineer on a project with a wood trussed roof. I have noticed some variations in the peak height in a run of identical trusses. Do you have any information on tolerances for the final dimensions of manufactured trusses?
Technical Paper
Thursday, April 3, 2025
SBCA Knowledge Center
Lumber Substitution TF No. 1106
If the truss design drawing specifies using 2x4 1650F SPF, can 2x4 No. 2 southern pine be used instead? What are some things that need to be checked?
Technical Paper
Friday, February 14, 2025
SBCA Knowledge Center
Storage Loading TF No. 1075
How much weight can a wood truss hold, when it’s made with 2x4 material and spans 36 ft. with a 4/12 pitch. I would like to hang things from the ceiling and am wondering if it is safe. I live in an area where there are heavy snowstorms.
Technical Paper
Friday, February 14, 2025
SBCA Knowledge Center
Unsecured Spacers TF No. 1073
During a home inspection, the inspector stated that the spacers were not secured at the attic trusses. What did the home inspector mean by this?
Technical Paper
Friday, February 14, 2025
SBCA Knowledge Center
Determining Truss Manufacturer From Stamps on Lumber TF No. 1072
I'm trying to find out who the truss manufacturer was that built the trusses in my home. I was told that there is usually a stamp on the side of the bottom chord. All I found was “2400F 2.0E.” What am I looking for?
Technical Paper
Friday, February 14, 2025
SBCA Knowledge Center
Purlin Design TF No. 1071
Do you have information on purlin grades and species to meet 50 psf top chord live load using 2x4s on edge 24 in. O.C. over trusses at 6 ft. O.C.?
Technical Paper
Friday, February 14, 2025
SBCA Knowledge Center
General Truss Question TF No. 1070
What do you mean by the term “trusses”? Are there different kinds of trusses? What are their uses?
Technical Paper
Friday, February 14, 2025
SBCA Knowledge Center
Necessity of Tags TF No. 1069
Are trusses required to have tags on all bearings that are not at the heel location? What about tags on webs requiring lateral reinforcement?
Technical Paper
Friday, February 14, 2025
SBCA Knowledge Center
