Construction workers fit a panel to the structural frame of the new elevated station at Amundsen-Scott South Pole Station. The structural insulated panels are called oriented strand board (OSB), and have 10 inches of expanded polystyrene insulation between 3/4"" fiberboard panels. Work is performed 24 hours/day, 6 days a week while there is 24 hours of sunlight during the austral summer, late October through mid-February. Exterior construction is performed during the summer while interior work is emphasized in the winter.