Tower Glass Replacement

Location: Baltimore/Washington International Thurgood Marshall Airport

The existing windows (lites) in the Air Traffic Control Tower at Baltimore/Washington International Thurgood Marshall Airport at nearly 25 years old had reached and exceeded their life expectancy. Moisture began penetrating the sealants, creating fogging on the interior faces of the insulated lite panels that could not be wiped or removed. One lite in particular viewed the critical Runway 15R-33L and Runway 10-28 intersection. The design evaluated replacing the lite in question. The challenge – accessing the lites due to the location of the tower in an economically feasible manner. Clarity and lighting irregularities between new and old glass were of major concern. In the end, it was decided that all 12 lites would be removed and replaced. Time was of the essence. As the tower is operated 24 hours a day, 365 days a year, actual working hours to remove and replace each lite had to be carefully evaluated. Michael Baker International’s professionals provided detailed project planning and coordination, which resulted in a construction effort that did not impact airport operations for one minute. The Tower Glass Replacement project was the recipient of the 2013 Modal Award, which is issued under the Maryland State Highway Administration’s Quality Initiative.

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