Product namesteel structure prefabricated housesSand BlastSweden SA 2.5 Sand blastingMaterialGrade Q235, equivalent to ASTM A36.Grade Q345, equivalent to ASTM A572.Welding TechnologySingle level butt welding, fillet welding by electric arc welding,and Gas shielded weldingSectionAny product shape according to customer's requirementsSurface treatmentHot dip galvanized, Epoxy zinc rich primerCertificationISO quality system, Chinese GB50221-2001, ISO,GB,ASTM,BS,AISI,DIN,JISWelding TestingUltrasonic Testing, X-ray TestingManufacturing TechnologyDrilling, Cutting, Assembling, Welding, Rectification, Testing etcThe reason for chooseeach metalWorkshop pre-installProfessional on-site guidanceEnsure the product qualityTimely service and progressProduction according welding rules a = 0.7 x thickness of webContinuous welding on both sides of each piecesMark every beam on the bottom plate for being saw after being galvanizedSend pictures to the buyer by mail during products being processedWe have 17 years experience of designing and producing steel structure buildingLocating in the Shanghai, only need 1 hour by car, the land transport cost cheaperOur engineers with 20 years steel structure design experience and advanced design software and strict  design attitude