Monday, November 20, 2017


  


Scope of Work
Cianbro extended the mezzanine level platform by 106 ft which increased the train station’s capacity to move people safely to and from the passenger boarding platforms.  

Project Details
  • Constructed a new 106 ft by 35 ft platform extension
  • Erected 80 tons of structural steel
  • Installed 600 lf of chilled water supply and return, 600 lf of cold water supply and return, and ductwork
  • Installed over 8,000 lf of 4 inch, 3 inch, and 1½ inch conduit, along with platform and mezzanine level lighting
  • Placed 80 cy of concrete on a stay-in-place deck and 320 lf of precast parapet
  • Constructed platform-level service rooms
  • Installed 7,000 sf of suspended steel ceiling panel system
  • Installed cast-in-place stairs, elevator frame, and provided capacity for a future escalator
  • Finished details included bronze elevator cladding, paver tile, granite work, and fireproofing
“This project was the first major structural work performed within an operating station. It sets a precedent for other stations that have outgrown their capacity.”
Kenneth Spain, WMATA
  

Unique Challenge



The Cianbro team successfully met the owner’s expectations by safely completing the first major structural work within an operating station and solved several heavy rigging challenges that included installation of a 12 ton beam over the right-of-way of the tracks—in the middle of the night—without disrupting train service the following morning. The team employed two 12 ton jib cranes mounted on Metro flatcars to perform this very difficult tandem pick.

Project Information

Owner:
Washington Metropolitan Area Transit Authority

Type of Project:
Transportation

Construction Schedule:
Completed March 2000

Location:
Washington, DC
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