Most commercial building codes call for non-combustible material.  Fire retardant lumber and plywood is ideal for these applications. Advantages Ease of handling Meets or exceeds specifications No buckling or twisting in a fire Stock Sizes 2 x 4 8′ – 16′ long 2 x 6 8′ – 16′ long 2 x 8 8′, 12′, 14′, … Continue reading Fire Retardant