When air terminals and conductors are mounted on a masonry parapet, how are the mounting bases typically secured?

The mounting bases for air terminals and conductors on a masonry parapet are typically secured using drilled in masonry anchors. This method is effective because it provides a strong and reliable connection to the masonry structure. Masonry anchors can be installed into the existing masonry to create a secure bond, ensuring that the air terminals and conductors remain firmly in place even under adverse weather conditions or during lightning activity.

Using drilled in masonry anchors is advantageous because they reduce the risk of damage to the structure and ensure that the anchors can withstand the various forces and loads placed on them. This helps maintain the integrity of the lightning protection system, which is critical for the safety of the building and its occupants. Other methods, such as screws, adhesives, or welded connections, may not provide the same level of support and durability in a masonry application.