Specifications include, but are not limited to: a. A lifting system or set consisting of 4 mobile lifting columns for vehicles shall be composed of interchangeable columns. The size of the set shall be able to be configured by the operator at the time of setup, without the need to modify the operating system. It shall be possible to operate any single column, a pair of columns, or all columns together, at the same time. b. Each column shall contain its own power supply which consists of two deep cycle (Group 31), and 12 VDC batteries combined to provide a stable 24 VDC power supply. c. The main power shall be fused between the primary power switch and the motor/control circuits to protect against overload. d. When fully charged, the onboard battery power system shall be capable of (19) lifting/lowering cycles at 100% of lifting capacity and (28) lifting/lowering cycles at 50% of lifting capacity. e. The 24 VDC on-board power supply shall incorporate built-in recharging systems with a pictograph on the display so the operator can visually verify the charging status. The recharging system shall be a built-in 110 VAC battery charger with indicator lamps. The battery charger shall be enclosed within a steel cabinet for protection from damage. The charger indicator lamp shall be easily visible through a sight glass mounted externally in the control cabinet. The indicator lamp shall be illuminated in steady red when the system is recharging, green when batteries are fully recharged, and green when the charger is providing a trickle charge. It shall be possible to operate the lifting column while the battery charger is actively charging the batteries. The base frame of the lifting column shall be of a rectangular design. The contact pattern to the foundation under the column shall be triangular in design to ensure uniform contact with the lifting foundation. Four (4) Portable Column Lifts
