Zhong da enterprise in 2002 to 2006, successively established reached the colored steel plate co., LTD., shenyang shenyang zhong da steel structure engineering co., LTD., affiliated enterprises such as liaoning zhong da metal products co., LTD. 2006 metallurgical industrial park in shenyang economic and technological development zone investment in building covers an area of 100000 square meters, a total construction area of 68000 square meters of steel structure processing base, comprehensive product steel components are formed after the production of the year, 50000 tons, caigang pressure plate of the comprehensive production capacity of 2 million square meters. Company according to the market changes, in 2009 began to large span bridge area of steel structure fabrication and installation, has cooperated-builing the second, third, fourth, shenyang welcome road, dongling, road, north-south trunk line, north along the viaduct and shenyang east tower across the hun river bridge, benxi, liaoyang, Bridges and other large-scale municipal projects...