A steel frame light-duty structure gas station building,  measuring 23m (L) × 17m (W) × 7.8m (H). The roof features a fully adhered 1.8mm thick TPO waterproofing membrane, 50mm-thick Rock Wool Sandwich Double-layer Color Steel Sheet, providing excellent fire and waterproof performance. Equipped with a inner gutter drainage system. Inner surface is coated with neoprene adhesive to enhance waterproof sealing performance.