Two-hour bearing wall assemblies utilizing Viance’s D-Blaze fire retardant treated lumber and plywood have received a new Underwriters Laboratories (UL and ULC) certification listing. Design No. V335 was certified under the ANSI/UL 263 standard for the U.S. and CAN/ULC-S101 for Canada earning a two-hour fire resistance rating for walls exposed to fire on the interior face.
Design No. V335, available at UL’s Online Certifications Directory, will allow architects and specifiers to design FRTW walls with brick, stucco, fiber cement, and other approved UL exterior facings.