A frame is constructed to support a roof. A plurality of panels can be slid into position on the frame from the ground. A mating channel joint is formed between adjacent panels that allows one panel to be slid over the adjacent panel into the proper position. The panels engage frame members to properly position the panels on the roof. The roof panels are formed with mounting structures located on the interior or underside thereof. The mounting structures include holes or other receptacles for receiving a rigid connector member. The frame members are also provided with receptacles for receiving the connector member. The connector member is inserted through the first mounting structure, through the receptacle in the frame member and through the mounting structure of the adjacent panel.