ABN AMRO Plaza in Chicago, Illinois. Courtesy Jon Miller, Hedrich Blessing photos.



ABN AMRO Plaza serves as an administration and operations center for one of Chicago’s largest banks. The technology facility features a raised floor system and accommodates more than 5,000 employees.

The building’s structure consists of a steel frame with a concrete core and a composite metal deck slab system. For two lower parking levels, a cast-in-place post-tensioned concrete structure is implemented, enabling long spans between columns and thinner structural depths.

After a thorough wind tunnel analysis was conducted, the core wall was made even more efficient by reducing its size to the relatively narrow dimension of 30-feet-wide by 150-feet-long, while still maintaining acceptable acceleration and deflection performance levels.

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