Environmentally friendly, can be recycled. Range Name Everest High Heavy Duty Bunk Bed. This is a heavy duty product. Each base has been tested to take a weight of 17 stone (108 kilos). The base slats are extra wide and made of solid pine, for added strength this bunk has a base slat centre rail support system. The ladder has extra thick flat “easy on the feet” ladder rungs and can go to the left or right of the bed.