Mayo Clinic Levels 7 and 8 Addition


Mayo Clinic


Construction Cost
$80 million

Completion Date
December 2013

Project Size
112,000 SF

Mayo Clinic Levels 7 and 8 Addition


The original 6-story tower, also engineered by Walter P Moore, was completed in early 2008 and was designed for a total of sixteen stories. The addition of the two levels in this phase totaled 112,000 square feet and included 92 additional beds.

The project also included the extension of the concrete shear walls around the elevators and new elevator machine rooms. Sequencing of the elevator construction was required to allow service interruption to only one elevator at a time while relocating and demolishing the existing machine rooms. In addition, a new patient and service elevator were added to the existing shafts.

Based on updated requirements for the mechanical systems, modification to the floor framing on the existing roof (Level 7) was also required to enlarge the mechanical shafts at eight locations. Shoring and beam strengthening details were developed to accommodate these requirements.

Since the tower has the capacity for even further expansion, we provided connection details to facilitate construction of the next phase.

In addition, we worked with the architect and contractor during construction to incorporate their recommendations for ways to improve constructability of future phases.