In seismic regions, what additional factors must be considered for adhesive anchors?

In seismic regions, adhesive anchors must be designed and installed with consideration for increased load requirements and dynamic forces because these areas experience significant ground movement during an earthquake. Seismic activity imposes additional stresses on structures, including lateral forces that can drastically affect the performance of anchors.

Adhesive anchors must be capable of resisting not only the static loads they are designed for but also the dynamic loads generated during seismic events. This means selecting anchors with adequate strength and ensuring that the installation method can accommodate these forces. In many codes and standards, specific criteria and testing protocols have been established, such as those from the American Concrete Institute (ACI) and the International Building Code (IBC), which emphasize the need for thorough evaluation under seismic loads.

The other aspects mentioned, such as lower strength requirements, visibility of adhesives, and aesthetic regulations, do not pertain to the structural integrity and performance of anchors under seismic conditions, making them less relevant in this context. Therefore, the focus on increased load requirements and dynamic forces is crucial for ensuring the safety and reliability of adhesive anchors in seismic-prone areas.