Horizontal Ladder:

The popular term "Monkey Bars", well describes this apparatus. It helps build the kind of agility and upper body strength exhibited by our primate friend. Monkeys and humans share a well developed grip and the teres major and latissimus dorsi muscles -- all involved in hanging, swinging and pulling skills.

Try swinging down the length of the bars, reaching and grasping, overhand, one bar after the other. Stronger and/or lighter individuals will be able to use more of a bent
arm. Or, you can simply use the equipment for chin-ups, using a variety of grips. Also, try lifting the knees and legs while hanging, helping build abdominal strength.

Installation Drawing (pdf)