Holding Court

by Jim Roosa, Proj. Superintendent; Morse Diesel Int., Inc., Chicago,
Paul Laskowske, Sr. Proj. Mgr.; Morse Diesel Int., Inc., Chicago,


Serial Information: Civil Engineering—ASCE, 1999, Vol. 69, Issue 2, Pg. 62-64


Document Type: Feature article

Abstract:

Contractors had their work cut out for them when structural engineers specified concrete-filled steel tubes for the Thomas F. Eagleton Federal Courthouse's perimeter columns. Working both night and day in all seasons for more than three years, contractors had to contend with temperature swings and misshapen columns. They also had to figure out how to pour concrete into the steel tubes as high as 557 ft above the ground. While the tubes made sense structurally for the building design, the contractors were the ones who had to figure out the best method to erect them. They devised a system, repeated more than 300 times, to put the tubes in place, weld them and fill them in concrete.

Subject Headings: Tubes (structure) | Steel columns | Contracts and subcontracts | Concrete | Building design | Welding | Temperature effects

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