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                   Picture of the Month

          Tunnel Constructed Between Rec Sports & Physics/Nano

     The new underground utility tunnel constructed between the
     Rec Sports addition and what will be the new Physics/Nano
     building.  If you look closely, you can see where the tunnel 
     transitions from a "cast in place" concrete structure to a 
     "precast culvert" type construction.  
 
     The reason for this change to "precast" was that the con-
     tractor had to stay within a one week road closure time
     schedule, as what you are seeing in the picture is actually
     Harvard Street. By utilizing the precast sections, the 
     under street tunnel installation took less than a day,
     leaving the much needed time to reconstruct the street
     and sidewalks.   

     Another issue that complicated this project was that the
     tunnel ran under an electrical duct bank.  You can see it
     in the picture, temporarily supported by a steel beam and
     many structural straps.  The project was a success in that
     the road was re-opened to traffic within the one week time
     frame.

     Thanks to David Rahn, Building Code Building Inspector, for
     the picture and information.

Contact Information

University of Minnesota
Building Code Division
319 15th Avenue SE
RM 270 Donhowe Building
Minneapolis, MN  55455
Phone: 612-625-3318
Fax: 612-625-6667

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