Model GS 5390 RT self-propelled scissor lift performs well on unimproved jobsites with up to 40-percent gradeability, the company says. The unit reaches a working height of 59 feet and has a lift capacity of 1,500 pounds. It comes standard with positive traction-controlled four-wheel drive and automatic leveling hydraulic outriggers. The 5-foot front extension deck and optional 4-foot rear deck extension allow reaching over obstacles. The rear platform railing can be removed for loading materials.