What type of bolt is often used in glazing for heavy applications?

In heavy applications for glazing, the type of bolt that is commonly utilized is the anchor bolt. Anchor bolts are specifically designed to attach structural elements to concrete or other solid materials, providing strong support necessary for heavy installations. They are embedded into the concrete and secured, which allows for a stable connection that can withstand significant loads, making them ideal for heavy-duty glazing situations.

In contrast, toggle bolts and molly bolts are generally used for lighter applications, such as attaching items to hollow walls, and are not suited for the structural demands of glazing. Expansion bolts are typically used in masonry but may not have the same strength and load-bearing capacity as anchor bolts in heavy glazing applications. Thus, anchor bolts are the preferred choice in these scenarios due to their robustness and reliability.