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The Peavey–Haglin Experimental Concrete Grain Elevator, built in 1899–1900, was the first circular concrete grain elevator in the United States, and possibly in the world. It is notable for proving the viability of concrete in grain elevator construction, and was designated a National Historic Landmark in 1981. Previous grain elevators, being built of wood, were expensive to build and vulnerable to fire.〔 and 〕 The elevator is located near the interchange of Highway 7 and Highway 100 in St. Louis Park, Minnesota. It was located along the Minneapolis and St. Louis Railway. The structure was commissioned by Frank Peavey, owner of a major grain company, and engineered by Charles F. Haglin, a Minneapolis contractor who also built the Minneapolis City Hall, the Grain Exchange Building, the Pillsbury Building, and the Radisson Hotel. The elevator was built by pouring concrete into wooden forms braced by steel hoops. The engineers were initially hesitant about how much pressure the structure could withstand, so they ordered the structure capped at . After an initial test of filling the elevator and then emptying it proved successful, the elevator was later built to its present height of . The inside diameter is , and the walls are thick at the base, tapering to thick at the top. After the initial experiments proved successful, the Peavey–Haglin elevator never held grain again, but its design paved the way for more concrete grain elevators across the United States. The elevator once served as a sign for a lumber store. It now carries the sign for Nordic Ware.〔(【引用サイトリンク】title=St. Louis Park Historical Society — Nordic Ware )〕 ==See also== *List of National Historic Landmarks in Minnesota *National Register of Historic Places listings in Hennepin County, Minnesota 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Peavey–Haglin Experimental Concrete Grain Elevator」の詳細全文を読む スポンサード リンク
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