Hourly Assemblies
We have provided drawings and construction details for exterior bearing and nonbearing walls requiring a fire-resistance rating to assist users of Pyro-Guard® fire-retardant-treated lumber and plywood. The drawings and construction details for 2-hr rated walls are based on assemblies listed by UL and the Gypsum Association. For 1-hr. walls the component additive method in Section 721.6 and the construction requirements in the International Building Code were used. Questions should be directed to 1 (800) TEC-WOOD (832-9663).
| 2 Hour FR Rated Exterior Wall Assembly | .dcd | .dwg | .dxf | .jpg | Construction Details (.doc) | Construction Details (.pdf) | |
| 2 Hour FR Rated Exterior Wall Assembly (Interior Side Only) | .dcd | .dwg | .dxf | .jpg | Construction Details (.doc) | Construction Details (.pdf) | |
| 1 Hour FR Rated Exterior Wall Assembly | .dcd | .dwg | .dxf | .jpg | Construction Details (.doc) | Construction Details (.pdf) | |
| 1 Hour FR Rated Exterior Wall Assembly (Interior Side Only) | .dcd | .dwg | .dxf | .jpg | Construction Details (.doc) | Construction Details (.pdf) |
A recent test at UL has resulted in a unique listing for a 2-hour fire-resistance rated bearing wall assembly of Pyro-Guard fire-retardant-treated lumber and Pyro-Guard fire-retardant-treated plywood. This new listing, UL Design No. V314, covers the vast majority of structure exposures providing an alternative to those designers wanting a UL Design number.
You can read more about UL Design No. V314 at UL’s Website.