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The crimped rib should go under the rib of the panel that follows it. Crimped Rib Underneath 1 Locate all of the wall panels and set each one alongside the building. 2 Fasten the wall panels at the top and bottom with screws. 6515 Detail Showing Center of Panel Screwed to Wall Channel 3 Fasten the center of each panel the wall channel with screws. to 4 Fasten overlapping ribs as before. Panels rest o frame as shown 3olt and nut does not go thru wall channeIat overlap Use bolts and nuts thru wait