Products

Lumber Design Values

No matter the species, component manufacturers (CMs) purchase and rely on the accuracy and reliability of many different lumber design properties, including: bending (Fb); shear parallel to grain (Fv), compression perpendicular to grain (Fc^), compression parallel to grain (Fc), tension parallel to grain (Ft), and modulus of elasticity (E and Emin).

Fire Assemblies: Performance and Application Using Wood Trusses - Educational Program

This presentation provides an overview of fire-rated assemblies that include wood trusses. Topics covered include assembly testing, Harmathy’s rules, and an examination of fire performance in the field. 

Floor Performance

Question: 

How do you avoid floor performance problems?

Energy Heels

Question: 

What is the definition of an energy heel?

Adequate Trusses

Question: 

Where can I find specs for what would be adequate trusses? I have a room with a 24 ft. span and my contractor is using trusses where the bottom plate is composed of 2x4s butted together and fastened with a metal plate. Is this ok?

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?

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?

Framing Gable End Overhangs

Question: 

What is the recommended way to frame gable end overhangs?

Necessity Of Tags

Question: 

Are trusses required to have tags on all bearings that are not at the heel location? What about tags on webs requiring lateral reinforcement?

Statistics On Truss Repairs

Question: 

How often are trusses repaired?