The developer of a Midtown Manhattan skyscraper evacuated after its support beams began buckling has described the incident as a “freak accident,” as he looked to deny that the building was at risk of collapse.

Buckling columns on a Midtown tower forced evacuations and street closures as city crews investigated the structural failure.

The United Nations launched an urgent appeal Wednesday for nearly $300 million towards Venezuela earthquake relief operations as the death toll from the disaster rose to more than 3,800 people.Officials were appealing for $296 million to provide urgently needed aid for 1.3 million people over six months, he said.

But the high-profile nature of the development itself, as the largest ongoing office-to-residential conversion in the U.S. with the addition of 11 new stories, takes the implications beyond just liability and insurance.

Work began Tuesday night to shore up the failed columns on the project converting a commercial office building to apartments, said the city’s Department of Buildings commissioner.

Several buildings in Midtown Manhattan were evacuated Tuesday morning after officials discovered buckling support beams in a former office building that is being converted to residences.

The Midtown high-rise that dangerously buckled Tuesday will need to be partially demolished — although stabilizing it to even attempt the risky move could prove extremely harrowing, experts told The Post.

The ambitious office-to-residential conversion added new construction to an existing building, causing supporting columns to buckle and steel beams to bend.