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    Qingdao QiyaoWartsila Lin Shan Ship Diesel Engine Co., Ltd. Hong pool and open-air span steel structure engineering, project location: Qingdao Economic and Technological Development Zone shipbuilding base. Construction area of 9000 square meters, is the biggest span 42 meters, 31 meters high column, steel pipe lattice frame columns, single column weight 42 tons, the single biggest box type crane beam weighing more than 70 tons, overhead crane in the workshop of 350 tons, the amount of the main structure of the steel more than 1500 tons.