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 would need to be very long, and hopefully, anchored into a grout-filled block backup wall. See snipped image below. An alternative, would be to anchor a plate to the brick, then weld the structure to the plate. This would make the anchor 4" less. Any thoughts?
Hi Jason,
After reviewing the attached detail, it appears that HIT-HY 200 V3 may work for either option. If a longer anchor is used, then the anchor may be subjected to greater moments due to the increased fixture thickness.
However, there are also a few considerations associated with welding on or near anchors:
For adhesive anchors, welding could negatively affect the adhesive bond due to the conduction of heat through the anchoring element.
Welding does not comply with the approvals of either mechanical or adhesive anchors.
Welding operations on anchors under load is extremely dangerous.
The combination of different influence factors has not been tested (welding different materials, welding methods, welding quality, etc.).
For design help, engineers commonly utilize Hilti’s PROFIS Engineering Suite software to perform calculations based on the specific conditions of the project. Access to the software can be found here. Please note that all decisions are ultimately at the discretion of the Engineer of Record on the project.
Regards,
Matthew