"Fire wall" means a wall which subdivides a building or separates buildings to restrict the spread of fire, and which starts at the foundation and extends through all stories to or above the roof as may be specified in the rules of the board. The board shall determine and specify in its rules the material and the manner of construction and erection of fire walls and the nature and extent of the protection to be afforded to openings therein.
N.Y. Lab. Law § 265