Drop-In Anchor

Drop-in anchor bolts feature a pretty simple design. This type of bolt is a female anchor that is placed in a pre-drilled hole in the concrete. The expander plug at the base of the anchor is set by using a setting tool. The setting tool is a steel rod with one end necked down. The necked-down portion of the tool is inserted into the drop-in anchor. It is designed to be tapped with a hammer until the lip of the anchor meets the lip of the setting tool.

This type of anchor is excellent for use with threaded rods to install electrical cable trays, HVAC ductwork, and pipes and heads for fire sprinklers.