What type of screws are used to attach Class A supports to the top of portable barriers?

The correct answer is set screws, which are specifically designed to secure components in place without the need for a nut. In the context of attaching Class A supports to portable barriers, set screws are ideal because they can provide a solid grip by fitting tightly into a pre-drilled hole or threaded socket. This ensures that the support remains firmly attached to the barrier, maintaining stability and safety in traffic management situations.

Set screws are commonly used in various applications where vibration or movement could cause other types of screws to become loose. Their design allows for a flush finish, which reduces the risk of snagging or interference with other equipment. The unique ability of set screws to hold components firmly makes them well-suited for this application in maintaining the integrity of portable traffic barrier systems.

Other types of screws, while they may have various applications, do not offer the same benefits in this specific context. For example, locking screws are generally used when a secure fastening that resists loosening due to vibration is needed, but they might not fit the specific design requirements needed for the portable barriers. Hex screws, with their six-sided heads, are commonly used in applications needing torque, but do not provide the same flush or tight fit as set screws in this scenario. Flat-head screws are