271 b1 components of the system are demonstrated in fig8 14 and fig1 fig1 shows a grid section made up of rafter members 9 cross members 6 a high side ledger 11 and spacers 7 the rafter members run parallel and under the overlapping corrugations 3 a 1 of panels the cross members run substantially perpendicular to and are supported by the rafter members the cross members attach to or interface with the rafter members to make a stable grid panels then are supported by the grid side views of cross member to rafter member connections are shown in fig8 14 the cross member has a projected portion 6 b and an end portion 6 a 1 which interface with the rafters the thickness of the projected portions 6 b can cause a panel to droop in the mid span of a cross member this is more noticeable in a flat surface of the flat faced corrugated panel a solution is shown in fig8 a filler 6 c with a thickness of about 3 16 inch on is attached to the top of each cross member the effect is a relatively uniform look with somewhat of a shadow effect as is shown in fig9 the filler and the projecting portion of the cross member could be combined into a single physical piece 6 bc for example if a u215b inch thick pvc strip were used for the bracketed 6 b it simply could be elongated to replace the filler fig1 shows an embodiment in which the flat facing 3 c or.