Equitable Building vs 900-910 North Lake Shore

Comparing the Equitable Building and the 900-910 North Lake Shore is interesting because they both rise in Chicago, IL, yet they were conceived by two different design teams, Skidmore, Owings & Merrill and Mies van der Rohe, and were completed at different points in time. They were finished more than 9 years apart.

This contrast within the same city allows us to see how different creative minds interpreted the evolving needs of Chicago across time.

Let's take a closer look!

The Equitable Building is clearly the larger tower of the two, both in terms of height and number of floors. It rises to 456ft (139m) with 35 floors above ground, while the 900-910 North Lake Shore reaches 0ft (m) with 29 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 Equitable Building and the 900-910 North Lake Shore were designed in line with the aesthetic conventions of the International Style style.

At the time, this style was at the height of its popularity. So both Skidmore, Owings & Merrill and Mies van der Rohe followed what was in many ways expected of them, producing designs that fit comfortably within contemporary architectural norms, rather than breaking with convention.

The Equitable Building is primarily commercial, while the 900-910 North Lake Shore is primarily residential.

The 900-910 North Lake Shore offers 524 residential units.

The two towers rely on different structural systems, reflecting distinct engineering strategies.

The Equitable Building uses a Framed Tube In Tube structural system, which combines a strong central core with a perimeter tube of columns, while the 900-910 North Lake Shore uses a Frame system, that relies on a regular grid of columns and beams to sustain its weight.

Yet, when it comes to their facade, they both employed the same solution, 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.