HART_150914_044
Existing comment:
Caring for Mountains and Clouds:
Unlike real mountains and clouds, Calder's sculptural abstractions need cleaning to remove accumulating dust and debris. However, their impressive size and height present a daunting challenge. Cleaning methods have been developed through a unique partnership between high rise building cleaners and a sculpture conservator. Much of the work is done at dizzying heights from an array of lift equipment.

To clean the clouds, one workers is hooked into a hang gliding harness suspended from the roof, while an assistant provides supplies from a nearby lift.
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