The team working on this Chicago riverfront tower faced a variety of constraints, from the narrow trapezoidal site to historic preservation requirements and a city-mandated public walkway. The solutions devised helped members complete the project one month early and under budget.

踩踏河的立面是通过阶梯式中心核心实现的，以最大程度地提高可租赁的办公空间。建筑物的那一侧由三列的三个柱子支撑，这些柱将九个结构钢柱的负载转移到三个节点中，并为下面的45英尺宽的覆盖河道提供了空间。

An embedded steel truss system in the east foundation wall allowed the team to construct the lobby level structural deck and proceed vertically about six weeks earlier than it could have with a conventional design.

该团队使用驳船安装的起重机来节省有限的现场空间，并通过在较低层的同时进行混凝土交付，并在较高的上方进行钢送货，利用了双级Wacker驱动器。

After construction had started, the owners needed to add a pair of mid-level floors, creating numerous design conflicts. “We had to incorporate these two floors, but we weren’t able to extend the end date based on the commitments that the ownership had,” says Joseph Sadowski, project executive at Clark.

The team regrouped with subcontractors and suppliers to make the changes and procure the materials within weeks. The changes also added 70,000 sq ft of leasable space to the 56-story building without sacrificing design aesthetics or performance.