Putting in a catwalk: Stan McLaughlin, a facilities technician in SCD's Operations and Infrastructure Support Group, completes installation of an aluminum catwalk between the rows of Regatta-H Turbo frames.

The catwalk allows 1,000 cubic feet per minute of airflow to blow up from below the raised floor. Cold air intakes in the front of each frame pull chilled air (62 degrees Fahrenheit) through the machine; the air, now heated to 92 degree F, exits the back of the frame.

Photo: Lynda Lester—NCAR/SCD