We are looking for a detail for a PVC pipe penetration through a UL L-528 horizontal assembly (wood truss). The pipe is larger than 2 diameter, but not more than 4. It is within the wall cavity …

I need a UL for the 4 x 4 steel column in an existing building. Single story building.

We are enclosing an energy storage system (UPS) room in an existing building. It requires a 2-hr separation to protect the building occupants. The room is the fire side, below the ceiling. Using …

I need to find a specific ul design number and fire caulk product for a 4" diameter cast iron pipe that penetrates a 1 hour rated partition. The partition is constructed of metal studs with …

UL N636 is what I need but with a solid 4 concrete floor (no steel deck). I don't see any UL ratings for intumescent on beams without metal deck.

I need a 2hr fire stop for a HVAC line set through a 9” concrete floor that consists of (2) 3/8” copper tubes. (1) has 1/2 foam insulation, the other has 3/4” foam insulation. The core drill …

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I'm looking for a UL assembly to provide a 2 hour rating for a pinched header on an exterior masonry load bearing wall. Only the interior needs to be rated. Can I use the UL # for a W …

Greetings Hakh. Thank you for checking out ASK Hilti! We will need to create an Engineering Judgment (EJ) to accommodate the firestop application you described in your inquiry. The EJ …

These types of requirements are specification driven typically requested by the design team, general contractor or owner. In addition to specific manufacturer training there are two …