Engineering Center

Which grades of stainless steel are susceptible to galling? All grades of stainless steel or primarily 300 series? Thoughts on pairing stainless steel studs with silicon bronze nuts?

I am looking for fire penetration details for electrical conduits, ladder rack and cable tray for 4hr rated walls. Can you provide a few options. Thanks,

Hi - I am looking for a UL listed or similar rated detail for a large 30 square x 6 deep recessed box within an 8 CMU wall. In this situation the entire cell depth is used and the remaining membrane is the original face / wall only on one side.

In an existing underground stairway, 3-hour fire separation is being requested, but there is an existing triangular floor penetration (with sides measuring 9, 7 and 6) where the stairway footprint changes, shown in the attached photograph. What would be the best product to provide a firestop? Hilti Firestop Block CFS-BL info ...

What is the difference between the 3.3.9 KB1 expansion Anchor vs 3.3.5 Kwik Bolt TZ2

Need to anchor 4 thick stone slabs to the concrete floor of a discharge water channel. Channel will mostly be dry, but in a storm event a column of water 8 to 10 feet tall will suddenly be discharged and run over the anchored stones. Stones must remain in place for years to come. City doesn't want to perform any maintenance or...

For Kwik Bolt TZ2, would contract drawings provide the effective or nominal embedment?

how may tubes of HITI 200a will i need for 24 each 7/8 holes, with 3/4 all thread, holes 6 deep?

I need a penetration detail with proper fire rated products for a wall that is comprised of drywall, then concrete block, then brick, then an air cavity, then another concrete block wall then finally a brick wall. the conduit penetrating this wall will be a metal 1 pipe for data cables.

Are the KB-TZ2 anchor bolts compatible with weathering steel?