Installation Best Practices

A full-scale truss bracing demo was an eye-catching feature of the BCMC 2017 show floor.

For decades, SBCA Jobsite Packages have helped component manufacturers (CMs) provide handling and installation guidance to their customers with every order. These pre-assembled packages of instruction documents, attached to truss deliveries in a zippered plastic bag, are now available in a digital format.

SBCA’s library of technical design and installation best practices has been expanded over the past year to help CMs navigate a wide array of code-related challenges in their markets.

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.

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

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

I am installing a 40-foot scissor truss that is designed to deflect about ½ inch. I am concerned that the deflection will cause an interior partition wall to pick up some load from the truss and transfer it to the floor system. Should I double up the I-joists under this partition to pick up the extra load?

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?

How do you evaluate whether a metal plate connected truss is still usable after exposure to fire? Are there any recommended tests?

How important is continuous lateral bracing in roof trusses? Is it detrimental to the roof integrity if it is missing?