Lamoreaux Building

The Lamoreaux Building was constructed in 1912 as a 3- story structure, which was originally designed for five. Some 60 years later, Wenzel Engineering's analysis of the existing structure led to the conclusion that, by using lighter weight steel framing, rather than cast-in-place concrete, three stories could be added to the building rather than two. Expansion of the existing building upward, rather than acquiring a new tract of land in another downtown Minneapolis location, was highly cost-effective.

  • Lateral stability to resist additional wind loads on the new, taller structure, was provided by a new reinforced concrete elevator core, anchored into the bedrock below using rock bolts.
  • Construction was completed on time despite the fact that the lower three stories of the building were completely occupied during the construction process.