Boeing International Headquarters vs 900 North Michigan Building

Comparing the Boeing International Headquarters and the 900 North Michigan Building is interesting because they both stand in Chicago, IL, and were completed just one year apart, but they were designed by different architects.

This offers a unique glimpse at how rival designers approached projects in the same city during the same era.

The 900 North Michigan Building is clearly the larger tower of the two, both in terms of height and number of floors. It rises to 871ft (265.5m) with 66 floors above ground, while the Boeing International Headquarters reaches 561ft (171m) with 36 floors above ground.

Of course, each project may have faced different briefs or regulatory constraints, which we don't really know about and could also explain the outcome.

Both the Boeing International Headquarters and the 900 North Michigan Building were designed in line with the aesthetic conventions of the Postmodernism style.

At the time, this style was at the height of its popularity. So both Perkins and Will and Kohn Pedersen Fox Associates followed what was in many ways expected of them, producing designs that fit comfortably within contemporary architectural norms, rather than breaking with convention.

The 900 North Michigan Building follows a mixed-use model, combining retail, commercial, residential and hotel. In contrast, the Boeing International Headquarters has remained primarily commercial.

The 900 North Michigan Building incorporates a 5-star hotel with rooms. More information is available at the official website.

The 900 North Michigan Building offers 106 residential units.

Both towers provide significant parking capacity, with Boeing International Headquarters offering 435 spaces and the 900 North Michigan Building offering 1330.

Both the Boeing International Headquarters and the 900 North Michigan Building rely on a Frame structural system.

A frame structure uses a grid of columns and beams to carry the building's loads. This frees the walls from structural duties, allowing for flexible floor plans and larger windows.

They also employ the same type of facade, a Curtain Wall facade.

A curtain wall is a non-load-bearing facade hung from the structural frame. It is anchored to floor slabs and transfers only its own weight and wind loads, allowing for sleek, glassy exteriors.