Spider’s Dual Monorail System is a complete solution for challenging curtain wall applications, providing continuous, horizontal mobility for swing stages and material hoists around a structure’s perimeter. Configurable as a single or double monorail, the Dual Monorail System is easy to assemble with rotating, pinned connections between each monorail beam and outriggers. Universal 6-inch by 8-inch I-beams support up to 3,000 pounds and are used for both the monorail and outrigger support, eliminating the need for special parts.