Installation Best Practices

Information On Frt Roof Trusses

Question:

I need to obtain some information on fire-retardant-treated roof trusses.

Scissors Truss Diagonal Bracing

Question:

We are finding it difficult to design permanent diagonal bracing for scissors trusses. The truss is often only a few feet in depth, which does not provide adequate room for diagonal bracing. Has SBCA come up with recommendations for permanent bracing of scissors trusses?

Installation Guidelines

Question:

Are there any associations that have recommendations for the installation of wood trusses?

Gable End Bracing

Question:

Is there a detailed table for gable studs that gives the maximum length a vertical member can be before a lateral brace is required?

Bracing Schematics

Question:

Are there any schematics available on how to horizontally brace a 7/12 pitch roof?

Jack Truss Connections To Girder

Question:

In a hip roof application where jack trusses connect to a girder truss using pressure blocking (power blocking), what is the proper installation and the span that is acceptable before a hanger is required?

Fire Rating For Truss Assemblies Built With 2x3 Lumber

Question:

Are there any published studies or guidelines on the fire rating of floor trusses built with 2x3 lumber?

Fire Cuts

Question:

What type of construction uses a fire cut truss? Could you describe a fire cut truss?

Penetration Of Fire Walls

Question:

Can a roof truss penetrate a one-hr. tenant separation wall without having a one-hr. rated ceiling? The building official insists that the 2x4 chords are combustible and nullify the integrity of the one-hr. rated partition that is constructed in an attic above an 8 in. C.M.U. bearing wall. The partition consists of gypsum board attached to 2 x 4 stud framing. The building official insists that a ledger must be attached through the gypsum board to support the trusses each side of the wall. This is almost saying that any rated assembly must have bearing only on other rated assemblies.

Wood Three Hour Fire Assembly

Question:

Is it possible to construct an assembly for ceiling between first and second floors using 2x with few layers of gypsum to obtain a 3-hour fire rating?