Loads, unloads, and conveys materials within or near plant, yard, or work site, and performs a combination of tasks under specific direction which may include shipping and/or receiving. Opens containers using hand tools; counts and weighs materials and records information. Loads and unloads materials onto or from pallets, trays, racks, conveyors, and machines by hand; loads or unloads materials into or from trucks by hand. Conveys materials using wheelbarrow, hand truck, forklift, electric dolly, elevator, or other devices; stacks or assembles materials; aids machine operators by lifting heavy objects by hand or by use of power hoist.