Engineering Center

CNa=10*da*sqrt(tau uncr/1100). Bond strength, tau uncr is 2200 per ESR and as defined in the variables and the anchor diameter is 0.625 in. Based on this equation the critical distance should be 8.88 in however the report is computing 8.839 in. I have tested different temperature ranges and anchor diameters and the critical di...

In Hilti Profis in the Masonry module, the report generated for the anchor design suggests that you can change the stand-off value but I am unable to find where to do so.

I need to provide documentation showing HIT-HY 270 is compatible with SGP interlayers.

We drilled a hole to set an anchor for 1/2" x 5-1/2" KB-TZ2 anchor. Minimum hole depth is 4-1/4" and minimum effective embedment is 3-1/4". We hit rebar in the wall before we reached our required hole depth. What is the spacing requirement to follow to move over and drill another hole? The abandoned hole will be grouted.

I have contractor installed expansion anchors only 1.5'' away from concrete slab edge. Is this acceptable? ESR-1917 report recommends min. 3'' edge distance for 5/8'' dia anchors

I have installed putty pads on all boxes in 1 hr rated walls. Do I need to install them on boxes in a smoke partition?

We are using some 3/8" Kwik Bolt TZ2-CS for our base plates. Is there a recommended shim to use in conjunction with these types of anchors?

When going from a weld pattern to mechanical fasteners, is it best to adjust the pattern? Is there a good rule of thumb for this or would it be necessary to look at uplift requirements for the building? If so, is that something regularly available in most structural sheet sets? Thank you

Because of the limitations for post-installed anchors in masonry with respect to head and bed joists, we often provide more holes in the attached steel member than required. Basically two sets of holes, offset in such a way that no matter how the head joints are laid out, one set will meet the spacing requirements. Invariably,...

Please cite a reference for minimum edge distance of a welded stud on a plate? PROFIS tells me that I do not have enough edge distance for a 3/8" plate with 3/4" edge distance to the 1/2" welded stud. I cannot find anything in ACI 318-11 or AISC 14th to support the limit that PROFIS is requiring. Please advise. Thanks. MGM