A roll-off roof observatory constructed out of a standard Arrow Shed from Home Depot. It has been modified so the roof is attached to a frame constructed out of 2x4s with castors on it. The castors roll on rails also build from 2x4s and 1x4s. The rails are supported on one end by the shed walls and on the other by 4x4 columns. Operation is behind and below the building with a pulley system made out of Nylon ropes and eye hooks. More at [ Ссылка ]
