Hamilton Caster & Mfg. Co. has designed a triple caster with three 21-inch wheels.

The caster was designed for an engineering design firm to support four corners of an 80,000-pound movable assembly.

The customer needed to make it mobile at speeds up to 3mph to travel through various docks and concrete roadways around an outdoor shipyard.

Hamilton added the three-wheel concept to provide maximum footprint and load distribution. To stand up to the small dips, potholes, and other unfriendly outdoor surfaces along the way, it chose solid pneumatic tires for extra cushion and shock absorption.

The caster was designed to support four corners of an 80,000-pound movable assembly.

Hamilton also applied a two-part marine grade epoxy finish to the assemblies to tackle the elements without incident. There’s also a parking brake to make sure everything stays put.