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'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 …

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 …

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 …

To achieve a 2-hr. restrained assembly rating, it is a minimum thickness of 4-1/2” for normal weight concrete and 3-1/4” for lightweight concrete. Further questions on the construction …

We need to top out an existing cmu wall that is about 16 from the concrete deck above. It is part of a smoke compartment and needs to be 1hr rated smoke barrier. The issue is there is no …

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

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 have checked the firestop library, i could not find a UL for 3 hours for HDPE pipe. is there any (3h) fire rated solution for HDPE pipes penetration with concrete/block wall? either EJ or UL? if …

The condition is a 2 hour rated wall assemblies that are penetrated by steel bar joists. The bar joist are perpendicular to a UL U419 assembly typically and one condition a UL U408 may be …