What is the purpose of chamfer strips in forms?

• A. To avoid sharp concrete edges that might break off
• B. To provide decorative edges
• C. To hold rebar in place
• D. To prevent concrete from sticking

Answer: (A)

Chamfer strips on forms create a beveled edge on the finished concrete. That beveled edge reduces the likelihood of edge damage—sharp corners are more prone to chipping, cracking, or spalling during vibration, curing, and handling, and they can be difficult to strip cleanly if the edge is square. By producing a gentle bevel, the concrete edge stays more durable and the form removal is smoother. They’re not used for decoration, they don’t hold rebar in place, and they don’t prevent sticking with release agents; their primary job is to avoid sharp concrete edges that might break off.