Collaborative Design Group Creative Thinking... Thoughtful Solutions
Armstrong Hall

Constructed in 1964 on the Minnesota State University campus, Armstrong Hall is a three-story red brick building with limestone accents. In 2005, a projecting stone sill broke away from the third floor east façade. Following a review of the stone on the building by the University, several projecting stone box frames were banded with metal strapping to prevent further failure. Additionally, several stone corner panels were found to be loose and/or failing and were subsequently removed.

Collaborative Design Group was retained to assess the exterior of Armstrong Hall, focusing on the stone panels and projecting window frames. Utilizing our in-house Existing Buildings Group, all elements of the building’s structure and exterior envelope were reviewed to understand its behavior and possible causes for the stone failure. CDG was asked by the University to develop up to three solutions for the failing stone issue, along with associated budget estimates. CDG also prepared construction documents, assisted with bidding, and performed construction administration for the repairs.


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Architecture • Engineering • Historic Preservation • Interiors • Planning