City inspectors will no longer be present every time a construction crane is erected or made taller, officials said on Wednesday, as they continued to modify safeguards put in place after the collapse of a crane 10 weeks ago that killed seven people on the East Side of Manhattan.

Instead, inspectors will make spot checks of the crane raisings, known as jumps, and of safety meetings at which procedures for each jump must be laid out.

The 22-story crane fell at a high-rise construction site on East 51st Street on March 15. Ten days later, the Buildings Department issued a new set of provisional regulations for crane jumps and said that as a precaution, its inspectors would be on hand every time a crane was put up, made taller or dismantled.

On Wednesday, the department issued a report saying its inspectors attended 51 crane jumps between March 25 and May 16. It described 49 of the jumps as successful and said its inspectors found serious safety violations at two others.