Is a topping needed for the UL fire rating (Design number K912) as shown on the 3 details? Or is there a separate fire rating for the no topping system?
The concrete topping is optional for the 2 hour unrestrained rating. A 1-1/8″ concrete topping is required for the 3 hour restrained rating.4. “Spancrete” (a hollow core manufacturer) is asking if every cell in their plank needs to be broken out to place grout.Rebar is suggested to be #4 x 2′-0″ long spaced at 24″ 0/C max, and these reinforced cells may require block outs. As for intermediate cells, if they are not opened, grout has to be able to flow between the plank ends to create a monolithic system. Therefore, an inspection method is required to assure this. EOR is the sole determiner of how much reinforcing is required and how often. We have seen lighter reinforcing used on closer centers than what we suggest in our Design Guide.
Related Questions
- Is a topping needed for the UL fire rating (Design number K912) as shown on the 3 details? Or is there a separate fire rating for that no topping system?
- WHAT TYPE OF FOUNDATION IS NEEDED FOR A DESIGN/BUILD OR A PRE-ENGINEERED STEEL BUILDING?
- How much concrete cover is needed for a concrete slab to meet a 4-hour fire rating?
