We are Zhejiang Dadi Steel Structure Co., Ltd. (Formerly known as Hangzhou Dadi Grid Structure Co., Ltd.). Affiliated to Longyuan Construction Group Co., Ltd., we own professional factories manufacturing advanced steel structures for domestic and international market. Our headquarter is located at Hangzhou, Zhejiang Province, in Yangtze River Delta where the strongest economy in China is booming with accessible transportation. With the integration of professional design, procurement, production, installation, international trade, and service, we have certifications such as General Contracting Grade A of Architecture （Mainly construction of steel structure）, Professional Contracting of Steel Structure Grade One, Premium Level of Steel Structure Fabrication, Special Design of Lightweight Steel Structure Grade A, and Level One of Metal Roofing Design and Construction. As a CCMSA-Specified （China Construction Metal Structure Association） enterprise, we hold ISO certificate on Quality, Environment, and Occupational Health Management, certification from AISC, CE, and qualification of physical and chemical detection capabilities.