Permanent Bracing for Pre-manufactured Wooden Roof Trusses
Permanent Bracing for Pre-manufactured Wooden Roof Trusses
(OP)
I'm looking at long-span (but under 60' span) pre-manufactured wooden scissor trusses each with a highly loaded 2x compression member (10kip+) that isn't attached to the roof sheathing...it flies across the attic space horizontally.
BCSI B-3 gives prescriptive methods for installing permanent bracing of trusses, but would this necessarily cover highly loaded compression members? ie, at what point does permanent truss bracing need to be designed by hand in lieu of following the prescriptions of BCSI B-3?
Of course, the truss designer is mute on the subject and specifically indicates that permanent bracing is not their problem.
BCSI B-3 gives prescriptive methods for installing permanent bracing of trusses, but would this necessarily cover highly loaded compression members? ie, at what point does permanent truss bracing need to be designed by hand in lieu of following the prescriptions of BCSI B-3?
Of course, the truss designer is mute on the subject and specifically indicates that permanent bracing is not their problem.






RE: Permanent Bracing for Pre-manufactured Wooden Roof Trusses
They (the truss designers) are the only persons who know what is needed for their individual truss elements.
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RE: Permanent Bracing for Pre-manufactured Wooden Roof Trusses
Is it a piggy back truss scenario? A sketch may be in order.
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: Permanent Bracing for Pre-manufactured Wooden Roof Trusses
It's not a piggy back, but i think they intended to make the chords at the ridge removable for transport purposes....basically, the top chord goes horizontal for 10-feet across the attic.
RE: Permanent Bracing for Pre-manufactured Wooden Roof Trusses
RE: Permanent Bracing for Pre-manufactured Wooden Roof Trusses
I never have, but would it be prudent to add something in? Hopefully not!