Attaching form supports to the slab with adhesives requires the brackets to be of a plastic material.

• A. True
• B. False
• C. It depends on the adhesive used
• D. Only for wooden form liners

Answer: (A)

When you use adhesive to attach form supports to the slab, material compatibility matters for the bond to hold and for long-term performance. Plastic brackets are specified because they resist chemical attack from common adhesives and won’t rust or corrode, which helps the adhesive maintain a reliable connection to the concrete surface. A metal bracket could corrode or react with the adhesive over time, potentially weakening the bond or causing staining, so using plastic brackets ensures the connection stays stable during formwork stripping and curing.

Choosing a different option would imply that the advice depends on the adhesive or that metal could be interchangeable, which isn’t the standard practice in this scenario. It isn’t limited to wooden form liners, and stating it’s false would contradict the established guidance.