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2015年2月,中国建筑第三工程局有限公司承建的天津117大厦第三道桁架层最后一段巨型桁架上弦吊装就位,标志着117大厦第三道即首道双层桁架顺利合龙。该大厦共设有9道环形带状桁架层,其中有3道是双层桁架,此次安装的桁架高度11.8m,顶部标高164m,总用钢量达到2106t,箱形梁及组合节点共计108件,为全国最大双层桁架。为保证施工,选用了2台全国最大的塔吊—ZSL2700
In February 2015, the last truss of the third truss layer of Tianjin 117 Building, constructed by China Construction Third Engineering Bureau Co., Ltd., was hoisted and hoisted. This marked the successful closure of the third lane of the 117th building, the first double-deck truss. The building has a total of nine circular belt truss layer, of which three are double truss, the height of the installation of the truss 11.8m, the top elevation of 164m, the total amount of steel to 2106t, a total of box beam and the combined node 108 Pieces, the country’s largest double-truss. In order to ensure the construction, we chose 2 sets of tower cranes, ZSL2700, the largest in the country