Posted by Kyle Hannonalmost 3 years ago
Welding of plates with Adhesive Anchors
Has there been any testing done with regards to welding of baseplates with Adhesive anchors already installed & cured?
Wondering if this will reduce the bond strength of the anchor if the cured adhesive is heated and cooled during the welding process.
1 Reply
Posted by Danielle Fileralmost 3 years ago
Hi Kyle,
Hilti has not performed any testing in regards to welding our anchors. The temperature welding produces will impact the cured adhesive, and could result in a reduction or loss of capacity.
Typically, engineers avoid welding on or near anchors for the following reasons:
- The mechanical properties of the anchor could be changed resulting in reduced load capacity.
- The corrosion resistance properties of the anchor could be reduced during the welding process.
- The chemical composition of the welding area could be altered and negatively affect performance.
- 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 could remove the length identification mark on the anchor.
- 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.).
The engineer on the project will be responsible for deciding if welding is acceptable for the application.
Regards,
Dani