Physical Qualifications: Climbing, Crawling, Kneeling, Light Lifting, Medium Lifting, Pulling, Pushing, Reaching, Stooping, Twisting Environmental Attributes: Cold, Dry, Dusty, Fumes, Hot, Inside, Noise, Oily, Outside, Wet Riggers will work with mobile cranes with a capacity of up to 120 ton and overhead cranes (radio control and pendent control) with a capacity of up to 60 ton.