Hayden Planetarium at the American Museum of Natural History

New York, NY

When the Hayden Planetarium was being demolished prior to the construction of the Rose Center for Earth and Space, EverGreene was contracted to coordinate the removal and storage of the 12-foot-diameter Aztec Astrological Calendar mosaic set in a terrazzo floor. The only way to keep it intact was to cut out a 16-ton, 20-inch-deep section of the floor, including the structural I-beams. Morse-Diesel riggers lifted the mosaic to the ground floor, where it could be removed through a demolished wall and hoisted onto a wide-load truck for transport. EverGreene obtained special permits to transport the mosaic late at night over the George Washington Bridge to a warehouse for storage. In order for our technicians to remove the excess flooring material from the back of the mosaic, we contracted with Urban D.C. to design and engineer a dual-cradling system which provided the integral support necessary to flip the mosaic onto its back without applying damaging stress. This steel armature served as the permanent support system for the mosaic in its new location.

General Contractor: Morse-Diesel
Engineer: Urban D.C.

The mosaic during removal

Removing the 16 ton mosaic floor

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