Understanding the UL Fire Resistance Directories - Ron Blank ...
Understanding the UL Fire Resistance Directories - Ron Blank ...
Understanding the UL Fire Resistance Directories - Ron Blank ...
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<strong>Understanding</strong> <strong>UL</strong><strong>UL</strong> Design U4114. Gypsum Board – 5/8 in. thick, outer layer paper or vinylsurfaced. (Laminated System) Wallboard appliedvertically in two layers. Inner layer attached to studs with1 in long Type S steel screws spaced 8 in OC alongvertical edges, and 12 in. OC in <strong>the</strong> field and outer layerlaminated to inner layer with joint compound, appliedwith notched spreader producing continuous beads ofcompound about 3/8 in in diameter, spaced not greaterthan 2 in OC.