A fall through an unguarded opening in the floor of a construction site constitutes a statutory violation only where a safety device adequate to prevent such a fall was not provided. A safety line and harness may be an adequate safety device for a person working over an open area or near an elevated edge.
Guaman v. City of New York, NY Slip Op 01025 (1st Dep't February 13, 2018)
Here is the decision.
