PHOTO BY ArcelorMittal Steel structural tower rises in London at Olympic Games site. The U.K.'s tallest sculpture—at 114.5 meters—reached structural completion on Oct. 28, when crews placed the top section of steel-tube diagrid. Designed as a permanent observation platform over London's emerging Olympic Park, the tower contains some 2,000 tonnes of steelwork. It was designed by local artist Anish Kapoor, along with structural engineer Cecil Balmond, former chairman of Arup Group Ltd., London. Steelcraft Erection Services Ltd., Dalton, is building the ArcelorMittal Orbit tower with tubular modules fabricated by the company's affiliate Watson Steel Structures Ltd., Bolton. The tower is
The market is generally healthy and steadily growing, and margins are up for large specialty contractors. Further, advances in design tools and owner demand for collaboration are giving subcontractors a seat at the table early on in projects.