Tasks involve the regular, and at times sustained, performance of heavier physical tasks such as walking over rough or uneven surfaces, bending, stooping, working in confined spaces, and lifting or carrying moderately heavy (20-50 pounds) items and occasionally very heavy (100 pounds or over) items. Physical Requirements: Tasks involve frequent walking, standing; some lifting and carrying of moderate weight (12-20 pounds); and/or the operation of vehicles, office, shop, or hand tools in which manipulative skills and hand-eye coordination are important ingredients of safe and/or productive operations.