... , the guarantee period of the anticorrosive coating of galvanized steel plate id 10-15 years.4. convenient construction ... rain-proof, long life, maintenance-freeSpecification:1. basic steel plate : prepainted hot-galvanized steel sheet,2. effective width : 1100mm3. length : ... roof in industry building, civil building, commercial building, steel-structure house, flat to slope project,factory, warehouse, ...