Must be able to physically perform the basic life operational functions of climbing, balancing, stooping, kneeling, crouching, crawling, reaching, standing, walking, pushing, lifting, grasping, talking, hearing, and repetitive motions. Must be able to perform heavy work exerting in excess of 100 pounds of force occasionally, and/or in excess of 50 pounds of forces frequently, and/or in excess of 20 pounds of force constantly to lift objects.