Building Component Safety Information (BCSI)

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

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

We are having a house built and on a recent visit we brought along a friend who builds houses for a living. He noticed that the trusses were wet and a bit moldy. The wood seemed warped, brown, and had white splotches on it. We are worried that it would later make the roof uneven. How could we tell how long the trusses have been exposed to the elements? What options do we have from here? Do we request new trusses, or can these be repaired?

Manufactured gable ends are actually frames even though they are often referred to as trusses. The webs are “studs” oriented vertically and usually spaced at 12, 16 or 24 in. O.C. The gable end frame is designed to transfer vertical loads from the roof to the continuous bearing wall below. Another way gable end frames are different from trusses placed in the interior of the structure is that frames experience perpendicular wind loads. The sheathed frame transfers the wind loads to the roof and ceiling diaphragms and vice versa.

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

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

I almost always see wood trusses erected with no stability bracing at points of support. It seems to me that common sense and section 3.3.3.4 of The American Wood Council’s National Design Specification for Wood Construction (NDS) require that lateral support be provided at points of bearing. Plywood decking doesn't provide any more restraint for a wood truss than it does for a roof joist. I doubt if it was a concern with short span trusses having 4 in.

I would like to know the proper storage and shipping of wood trusses.

Is it the responsibility of the truss manufacturer to provide a sealed layout drawing for roof trusses?

Would you please inform me of the specified requirements of the size and the amount of nail attachments from the truss to the top plate?