CORRUGATED GAUGE GALVANIZE!) CORRUGATED STEEL SHEETS FASTENED "(0 (FLAD IMDCO PURLINS WITH 68 YZ WCCO SCREWS. FASTEN EVERY THIRD CORRUGATION iff MEACH PURLS& END LAPS TO BE ED OVER A PURUN. SIM LAPS TO RCVELMEWAINggent S' O.C. Al.!. SCREWS TO HAVE AMIN. 1/2' WA HEAD &A NEOPRENE WASHER. ATTACH PURUNS THRU