The workers were hurt inside 317 Madison Ave., near Grand Central Terminal, witnesses said.
Metro-North service was still running, but 20 to 30 minute delays were expected, officials said.
He suffered head trauma and was treated at Bellevue Hospital, the FDNY said.
The lines have seen the biggest increase in wait times for passengers.
Signal problems at Grand Central Terminal disrupted 7 train service for hours Monday, officials said.
The workers were covered in debris after falling about one floor, the FDNY said.
A Manhattan-bound 7 train stalled because mechanical problems mid-tunnel, the MTA said.
Beware of driving anywhere near Midtown and be prepared for delays, officials said Tuesday.
Chef Dominique Ansel will give away Nutella pancake cones starting at 11 a.m. Tuesday.
Schiavone Construction reached a $20 million settlement with the federal goverment in 2010.
Commuters should expect 15 minute delays as trains pass through the crash site.
Protests took place Downtown and in Times Square, Bryant Park, Grand Central Terminal and more.
Hundreds of protesters took to the streets, many headed for the annual Christmas tree lighting ceremony.
A train malfunction at Grand Central Terminal disrupted 7 trains for Wednesday morning's commute.
A "Moby Dick" marathon and the annual holiday train show are happening this weekend.
Get our daily New York City news and alerts!
Thank you for signing up!
Would you like to sign up for additional newsletters?
Thank you for signing up for additional newsletters.