Engineering Center

Can you please provide the FS-ONE fire caulking detail for the 2-hour rated shaftwall (UL U497)? Please see the attachment.

We have a continuous steel plate fastened to studs and extending through the 4 layers of drywall. What system is needed for this application?

What does Hilti offer that provides both 2hr F&T rating for a new electrical box in a composite deck? The box is new in existing construction. Assume Type 1A with 6 concrete over 4 metal deck. Does UL have a listing detail for this kind of penetration?

We have conditions where 2 layers of gypsum board under roof deck meet spray on fireproofed steel beam. Can we add spray over the gypsum board, or should we provide firestopping product between them? Also, there are conditions where gypsum boards meet intumescent painted steel beam. what type of product we can use at these ...

Team, can we use 3/4 Hilti HAS rod in 1 1/8 hole in base plate?

Given an installation where the Hilti HAS threaded rod would only experience shear loads, would there be an allowable reduced torque value and how would that affect anchor's capacity? Given the same installation in an overhead application, would a reduced torque value be allowed?

We have square duct, fiberglass insulated with maskit that penetration block wall which is a smoke partition, and the USACE is requesting an UL on it. We used White tube of FS-one max High Performance Intumescent firestop sealant. Need this as soon as possible trying to get our overhead ceiling inspection with fire chief.

Does Hilti have a screw that can fasten cold-formed steel to brick masonry?

Good Day, I was wondering if there is an approved system for a HVAC duct (26x14) through a 1-hr rated roof? The duct would then be ran on the roof. Another penetration for a duct will go to a roof mounted fan. Please let me know, thanks.

We have an opening in a wall framed with 6 studs and 5/8 sheetrock on either side. The contractor has used the Hilti Fireblock to close this opening. They have installed the fireblocks with the 5side passing through the cavity. Is this acceptable as Hilti spec says for Studs up to maximum 3-5/8 the fire block can be installed ...