Universal Fireproofing Patch Coverage
Let us assume you either own or are responsible for the fire safety of a building. You or your maintenance people notice, an insurance inspection, or your local fire officials notice the fireproofing sprayed in your building had been damaged. The first thing I would ask you to determine is the scope of the damage. If the damage is smaller and spotty in nature; fork lift damage, ladder damage, new conduits, cables, HVAC work, remodeling or a host of other possibilities then our UFP patch very well might be your answer.
To determine the number of buckets required you have to do a few things. First, you will have to count the number of damaged locations. It could be a half dozen up to several hundred locations.
Next you will have to determine the approximate size of the damaged areas. Again these do not have to be individually measured but a rough guess should suffice. It may be determined that they are all 2’ by 2’ (4 square feet each), they may be roughly 1” by 1” (1 square foot), somewhere in between, some larger, some smaller. It might even be a mixed bag; 10 spots may be 2’ x 2’, 50 spots 1’ x 1’, and 75 locations smaller than that. We have to determine the approximate square footage of repair.
Finally, we have to determine the material thickness. Our Universal Fireproofing Patch (UFP) is designed (thermally) such that we are attempting to have our patch match the existing SFRM thickness. This makes the big assumption that the thickness as originally applied was indeed the correct material thickness to provide the required hourly rating. We at the Vellrath Group can determine the actual correct thickness upon request if need be, but in the vast majority of cases the “patch to match” concept has worked out well.
Let us assume for discussion purposes that we have determined that the 2’ x 2’ areas are to receive 1’ of UFP, the 1’ x 1’ areas are to receive 3?4” of UFP, and the 75 smaller areas are to receive 1 1?4” thickness of UFP.
Calculations:
2’ x 2’ = 4 SF @ 1” thick at 10 each = 40 Board Feet
1’ x 1’ = 1 SF @ 3?4” thick at 50 each = 37.5 Board Feet
Smaller than 1’ x 1’ @ 1 1?4” thick at 75 each = 87.9 Board Feet TOTAL 165.4 Bf
1’ x 1’ = 1 SF (say 2/3 SF each) = .67 SF @ 1 1?4” thick
If we total the board footage for all 3 conditions we end up with 165.4 BF. Each bucket contains 8.76 board feet per bucket. Doing the math 165.4/8.7 we end up with 19 buckets to complete this application. Before we finish we have to think about waste. Historically the waste is not much in that we are applying just what we need to repair the area and we do not have to deal with overspray, hoses, mixers and the like, but we should figure some waste. In this situation I would figure at least 2 extra buckets for waste, could be more, could be less but at 21 buckets you can take advantage of a volume discount of a half pallet order.