John Hancock Building 175 East Delaware

RRJ performed building enclosure consulting services on the residential portion of this iconic 100-story skyscraper to assess the 40+ year old insulating glass units (IGUs) glazed into the aluminum curtain wall due to the ongoing failures of the IGUs perimeter seals resulting in interpane fogging.  Independent performance testing of the IGUs was performed along with a review of the curtain wall documents and replacement records. RRJ developed continuous testing and monitoring techniques of the IUGs resulting in the design and implementation of selective IGU replacements.

How RRJ helped

  • Review curtain wall documents
  • Analyze in situ frost point performance testing
  • Capital reserve requirements assistance
  • Review energy code provisions
  • Establish performance and design parameters
  • Construction Administration for replacement

Project Details

Location Chicago, IL
Client Sudler Property Management
Team Dennis Johnson, Rebecca Booth
Markets Residential, Commercial
Services Field & Laboratory Testing, Investigation, Repair & Restoration Design Services

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