The lowest or basic strength of aluminum and each of its alloys is determined when the metal is in the annealed or soft condition. This is designated as the O (letter O) temper. For example, the annealed condition for alloy 1145 is written 1145-O.
What is a scissor lift? A scissor lift is a type of aerial work platform used to lift personnel. These platforms extend and retract vertically with the help of the scissor linkages that fold in a crisscross manner. Scissor lifts are typically electrically powered although there are some that are powered by internal combustion engines.
1. Scissor-type or hinge-type. These frame-engaging lifts lie flat on the floor, allowing the car to drive over them. Once the arms are positioned to align with the jack points, an electric, hydraulic-electric, or pneumatic system raises the lift by means of scissor-action joints or a hinged parallelogram of beams.