Segmented retractable steel roofs

An operable steel roof system for new and existing facilities, comprising a plurality of movable segments supported on two fixed support members, the cross-section of the movable segments are inverted U-shapes for first and last segments, a T shape or two inverted L-shapes for a middle segment, and inverted L shapes for remaining segments between said middle and first and last segments, said each of segments comprising:

• a) a vertical portion including a plurality of vertical steel trusses connecting by steel diagonal braces for supporting roof loads of each segment and its adjacent segment, said vertical portion having two ends supported on said two spaced fixed support members,
• b) a horizontal portion including a plurality of horizontal steel beams connecting by horizontal-bracing members for supporting a roof cladding and providing diaphragm action on said horizontal portion,
• c) an elongated track (8) secured on each of said horizontal steel beams,
• d) said horizontal portion having one end supported by said vertical portion and an other end supported by a wheel and axle system which rests and moves along said track over each of said horizontal portion of an adjacent said segment,
• e) said horizontal portion having a vertical steel brace system connected to each end of said vertical portion, and a plurality of wheels rotatably mounted on a base portion of said two ends of said vertical portion and moving along a steel rail track connected on the each of said fixed support members so that said segments move and nest next to said adjacent segment.