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.
Post. Tweet. Comments (1). Also called a stairway lift, stairway elevator, stair glide, chair lift or stair chair, a stair lift is a motorized chair you sit it to glide up or down a staircase on a rail system for anyone who has difficulty or in unable to navigate stairs. Most stair lifts are used indoors; outdoor models tend to be at the higher end of the price range. 2  Options include adjustable seat and footrest heights, folding seats and rests to save space, greater weight capacity (usually 300 pounds but can be 375-500 pounds) and a security lock to limit who can use the chair lift.