New York, NY —

A construction worker was killed Thursday after falling 40 stories from a skyscraper on Manhattan's far west side. Anthony Esposito was part of a crew dismantling a tower crane. Mayor Michael Bloomberg says the worker lost his footing after the platform he was on tilted:

BLOOMBERG: According to preliminary reports -- and that's all we have at the moment -- he was wearing a harness. But the harness wasn't attached to anything so it didn't do anything.

REPORTER: The soon to be luxury apartment tower is owned by Developer Larry Silverstein.

The site's been shut down and four violations were issued to the general contractor, Gotham Construction, which issued a statement expressing its condolences to Esposito's family.

Esposito worked for a subsidiary of DiFama concrete. Another DiFama employee died earlier this year when he fell from the Trump Soho towers on Spring and Varick.

A call to DiFama went unreturned.