Nail-in anchors are rated for tensile loads in concrete.

• A. They are used only in wood.
• B. They do not provide a load rating.
• C. They are rated from 500-1,500 pounds for a tensile load in concrete.
• D. They require epoxy for bonding.

Answer: (C)

Nail-in anchors are designed to resist pull-out forces in concrete, and their capacity in tension is defined by the manufacturer for specific embedment, hole size, and concrete strength. Because of that, they come with a published tensile load rating for concrete, often in a range like 500–1,500 pounds depending on the anchor size and conditions. This rating lets you pick an anchor that can safely handle the expected pull force in your concrete member, and you should always confirm the exact value from the product data sheet for your particular installation.

Other options don’t fit because nail-in anchors are not for wood, they do provide a load rating, and they don’t require epoxy bonding for typical mechanical nail-in systems (epoxy is used with adhesive anchors, not standard nail-in types).