Engineering Center

Please provide a UL Head of Wall detail for a shaftwall (UL U415) meeting a floor assembly of a 4 concrete slab over precast concrete double tee structure and a roof assembly of a precast concrete double tee structure, concrete flange is (2 thick) Thanks!

When I found that my design results using uncracked concrete were worse than those using cracked concrete (with all other parameters being the same), I wasn't sure what went wrong.

Our team is looking to purchase putty pads and we need to confirm if you stock them. If so, could you please provide us with a cut sheet that specifically states the pads are plenum rated? Alternatively, a letter from Hilti confirming this would also work. We require this documentation today so that the inspector can approve ...

Hello, Is there an updated epoxy calculator for the HIT-RE 500 V3 for larger threaded rods? We are routinely dropping 1 3/4 - 2 1/4 anchor rods up to 6' embedment. The app only allows for a max of 1 rods. The excel calculator I currently use is always 1/2 a bag off. Thank you

I would like to know the ''pull out'' or ''tension strength'' of a Hilti KB II 1/2'' x 3 3/4'' wedge anchor. Part Number: 00045367

I have a 6 ABS pipe and a 6 cast iron pipe planning to go in a 2 hour shaft what system do we use for penetrations for both of these materials through this shaft?

What is an economical shear connector to connect a concrete overlay to the top of an existing concrete foundation. I am currently specifying hairpin dowels anchored to the existing foundation using HIT RE-500 V3. Is there a more economical solution? This is a relatively large area, so there is a large number of holes to drill ...

Our project utilized hilti HY270 epoxy with an expiration date of march 2025 and the product was installed on 4/30/25. Would Hilti be able to provide a memo stating that this is structurally acceptable for the inspector and EOR?

5 1/2” OD stainless steel pipe going through 1 hour fire rated wall. We will need to remove the pipe periodically. Is there a product we can use for this? Or can we get an EJ and use fire brick?

We are using Firestop Top Track Seal CFS-TTS system in a 1 hour rated drywall, a metal conduit runs through the wall right below the track seal that has been fire caulked. The fire caulk is touching the top track seal. Can the same brand, but two different systems touch each other? picture shows a black pvc coated conduit be...