The accident happened on W. 42nd St., where trade center developer Larry Silverstein is building two 60-story luxury apartment buildings.
Silverstein referred questions to the general contractor, Gotham Construction, which didn't return a message seeking comment.
More than 20 people have died in New York City construction accidents this year, including nine in two crane collapses. A window worker died last week after falling 12 stories from a Manhattan building.
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