What is a spreader plate?

• A. A device that distributes a load across a single point.
• B. A metal plate used to distribute a load across multiple points and prevent hardware deformation.
• C. A device used to anchor rigging hardware to the deck.
• D. A boundary to keep people away from hazards.

Answer: (B)

A spreader plate is a flat metal plate used in rigging to spread a load across several attachment points rather than concentrating it at one point. By sharing the load among multiple points, it reduces point stresses on hardware and the mounting surface, helping prevent deformation, cracking, or failure of shackles, eyebolts, or the deck. It’s placed between the load and the hardware or between multiple attachments so the force is distributed. For example, when lifting a heavy object with multiple shackles, a spreader plate helps distribute the load evenly. The other descriptions don’t fit: spreading the load over a single point increases stress; anchoring hardware to the deck describes a base/anchor function; and a boundary to keep people away is a safety barrier, not a load-distributing plate.