Replacing a HVAC unit on a two hundred fifty three (253) foot high twenty (20) story building:

Birdseye View of the rooftop showing the derrick and new cooling towers and chiller on the penthouse roof.  The chiller weight was 17,000 pounds.

Raising one of the 17,000 pound centrifugal chiller barrels early in the morning before the workers arrived in the floor below.

Lowering the barrel onto the steel deck we built outside the penthouse so we could roll all the equipment in at floor level.

We suspended the chiller compressor from our gantry and rolled the two barrels under, ready to join the barrels and lower the compressor into place.

Our 175 ton Krupp KMK5175 fitted with 141 foot jib angled at 30 degrees to erect the extensive support steel and the 17 ton derrick with 100 foot boom.

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