Which of the following is a bolt used in structural connections?

• A. Self tapping bolt
• B. Anchor bolt
• C. Nut
• D. Gasket

Answer: (B)

In structural connections, you need a fastener that can transfer loads from the member into the foundation or surrounding material. An anchor bolt is built for this role; it is embedded into concrete or masonry and provides the anchorage for base plates, columns, and other structural elements, resisting uplift, tension, and shear. Self-tapping bolts are typically used for metal sheets or light fabrications, not base-plate connections to concrete. A nut is a threaded piece used with bolts, not a bolt itself, and a gasket is a seal between joints. So the bolt used in structural connections is the anchor bolt.