It is the first time that the steel tower is designed and constructed in China without mature understanding and construction experience.

国内对钢塔柱的设计和具体施工尚属首次，对其没有成熟的认识和丰富的设计施工经验。

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Based on the development of the steel tower and the characteristics of the tower material, this article carries on a study on the feasibility of using formed in communication steel tower.

从通信铁塔的发展趋势和塔材的使用特点出发，从技术与经济两方面对冷弯型钢在通信铁塔中应用可行性进行探讨。

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Through the detection of mechanical properties and deformation, as well as the analysis of deformation and bearing capacity, the steel tower after fire can't satisfy application requirement.

钢塔材料力学性能检测、变形监测以及变形承载力分析表明，火灾后的钢塔已经不能满足使用要求。

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At the top,you follow a short path to a stone-and-steel observation tower.

VOA: special.2009.07.20

In addition, PNC is currently building the greenest skyrise in the world in steel town, The Tower at PNC Plaza, that will be certified LEED Platinum and is slated to open in 2015.

FORBES: Green Living In America's "Steel City"

Investing in a partnership that owned an iconic building in Pittsburgh - The U.S Steel Tower - has turned into a tax nightmare for out of state investors.

FORBES: The Tax Shelter from Hell - U.S. Steel Tower in Pittsburgh

And it was on hand at the early stages of rebuilding, as it won a contract to put up steel for the site's signature tower, One World Trade Center, in 2006.

WSJ: Steel Firm's Woes Snag World Trade Center