Labels:crt screen | dialog box | hakham | plant | web site | window | windowpane OCR: Understanding the UL Fire Resistance Directories Numbering System for Fire Rated Assemblies Start with letter Floor ceilings, Concrete and Cellular Steel Floor B. Concrete and Steel Floor Units Concrete and Steel joists Concrete Wood Joist L.M Beams N.O The chart at the bottom ofthe page in volume 1 has this information When looking for UL design number the first thing to look at is the far left hand column titled Groups of Construction In this column you will pick the structural element you are using on the project Ifyour project calls for floor -ceilings concrete and cellular steel floor you design will start with the letters For concrete and steel floor units the design will start with D.E orF Continue down the slide Prev Next your
