Metro

Qns. building roof cave-in

A Queens building with a host of code violations partially collapsed last night, authorities said.

The roof of the vacant two-story structure at Jamaica Avenue and 79th Street in Woodhaven caved in at about 6:20 p.m., the FDNY said. No one was hurt.

“I was outside having a cigarette and heard a loud boom,” said neighbor James Wohlmaker, 42. “The whole back end of the building is just gone.”

The Department of Buildings ordered the second floor evacuated in 2012 because of “questionable construction methods,” according to the DOB Web site.