Sustained physical effort required in working with average or lightweight materials and supplies with continuity of effort or frequently working with heavyweight materials. Continuous standing or walking. Continuous operation of machines or equipment resulting in considerable fatigue. Frequent, prolonged, and strenuous, heavy lifting, pushing, or pulling and excessive crouching, stooping, crawling, or lying in a prone position is involved. A high degree of dexterity is required.
Work is performed in non-sitting positions.
The work area is adequately lighted, heated, and ventilated.