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 U4111. Floor & Ceiling Runners –Min 25 MSG galv steel 1 inch high, return legs 2- ½inin.wide (min), attached to floor and ceiling with fasteners.2. Steel Studs – Min 2-1/2 in. wide, 1-1/4 in. legs, 3/8 in.return, formed of min 25 MSG galv max stud spacing 24in. OC. Studs to be cut ¾ in. less than assembly height.