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manufacturers metal structural steel building steel frame used for Multi-story building costs on China WDMA Dimensions:Customization on any size windowPRODUCT DESCRIPTION Service: One step, Designing, Fabrication, and Installation Certification: ISO9001, CE, SGS Welding standard: AWS D1. 1 1. 5 Inspection: CWI on site Standard: AISI, ASTM, BS, DIN, GB, JIS. Place of origin: Shenyang China Brand name: Ibeehive Connection: high strength bolt Surface treatment: galvanized or painted Door: sliding door or rolling door. Windows PVC window or aluminium window. Coated steel panel coated steel panel,