Proj Overview
Tonka Village includes the construction of two five-story structures, comprised of luxury condo and apartment units. Project team leaders relied on efficient building materials to meet the project’s one-year timeline.

County Materials’ hollowcore was specified for the buildings’ podiums for its high-performance strength and installation efficiencies. County Materials utilized its enhanced production capacity to manufacture 54,700 square feet of prestressed concrete hollowcore planks and solid slabs with short lead times.

In addition to its structural benefits, hollowcore is an efficient construction material. During manufacturing, the prestressed concrete planks are cut to specification with proper openings, which eliminates on-site cutting and prepares the planks for installation upon arrival to the jobsite. Once installed hollowcore plank serves as an instant, stable work deck, reduces the need for additional equipment, and maximizes efficiency in tight staging areas.

On this project, product deliveries were coordinated with the contractor and arranged to overcome limited site access challenges. This preparation allowed hollowcore to be delivered and installed within four weeks. County Materials’ ready-to-install hollowcore plank saved valuable time on site and turned the building over to trades sooner than would be expected with alternative materials.


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Project Team

Architect and Contractor

Doran Architecture


BKBM Engineers


Tonka Village Partners LLC


County Materials Corporation

Photo Credits

County Materials Corporation

Key Project Attributes

  • First multifamily housing complex built in Tonka Bay, MN
  • County Materials utilized its enhanced production capacity to keep the project on schedule
  • Hollowcore maximizes efficiency in tight staging areas

Project/Precast Scope

  • More than 54,700 SF of prestressed hollowcore planks and solid slabs were installed.
  • Manufactured by County Materials Corporation in Roberts, WI.