Trapezoidal single sheet for roof and side coverage of steel buildings. the strong profile offers mechanical strength and special shape of edges ensures the water -tightness of connecting joint. the raw mwterial is prepainted coils, width 1250mm with RAL 1014,5012 and 9016 or any special colour request the thickness is 0.5 and 0.7 mm. we can treat the corrugated sheet according to its applications such as the Ceramic procees produce the chmical vapour attck the sheets from inside building , also in the iron and steel factory pickling line , we succeded with both of them.