Engineering Center

I am having problems with the hilti app. it is not letting me send in tools for repair. not sure what's going on.

Our original design showed steel elevator plates being lag bolted through 2 layers of drywall into blocking behind to maintain a 2 hour rated shaft. Our concern is that with the weight of the elevator being applied to the plates, the drywall behind will crush and create a loose connection for the elevator plate. We are hoping ...

Referring to ACI318-19, it appears critical edge distance is a function of effective embedment, but looking at the TZ2 ESR this does not appear to be the case. For example, two different diameter bolts with the same embedment (5/8 and 3/4 @3-1/4 embedment, for example) have significantly different critical edge distances. Addi...

Hello, I am trying to analyze 10 slab that supports 12x12 column with axial load and a moment. I am not sure what is the difference between development length design and anchoring to concrete to design for bar yield is. The goal is to see how much development #5 bars need and to compare to the embedment we have in the existing...

We have a concrete pad being poured with epoxy anchors called out. Our drawing notes state a 28-day cure time prior to installing HAS-V-36 rod with HIT-RE 500 epoxy. This is based on residual water in the concrete preventing bonding, per engineer. Is there a way to install this sooner? What concrete strength are we looking for...

i am working on a wood frame project. We are fire caulking pvc pipes 3” and under. We have always installed the fire caulk at the bottom of the top stud and the top of the bottom stud. We are being asked to caulk at the ceiling as well even though it has been done from above(top of bottom stud on floor above). Is this the appr...

I need to transfer shear from a wood wall into a steel beam through a 2x nailer attached to the flange of the W shape with PAF's. What is the shear capacity of the connector? Is shear controlled by the wood? Is there any information on spacing requirements of PAF's in wood?

Hi, I am designing concrete screw anchors in one of our projects. I have a connection with two different shear loads, 1970# and 1800#. Everything on both connections including size, layout, eccentricity, ...is same. Hilti PROFIS designs one of them with considering group anchors and the other one without considering group effe...

Hello I'm designing Hilti adhesive anchor HIT-RE 500 V3 and getting a message that The anchors are too close to the edge of the bae material. The anchor distance to base material edges (y) can be reduced to a minimum value of 1.75 in if the installation torque is reduced. Check the box corresponding to reduced installation tor...

I'm designing a curtain wall frame made of HSS8x4 tubes. In an effort to brace this structure every 10' (it's about 50' high), I'd like to fasten the column to an existing brick/block back-up wall. However, I'm assuming at least 8 of the anchor will not be encased in anything; i.e. 4 of tube + 4 of brick. So, the anchor wou...