2006 New York Code - Service Equipment.

 
    § 27-554 Service equipment. Provision shall be made for the weights of
  all  building  service  equipment  including  plumbing  stacks,  piping,
  heating and air conditioning equipment, electrical equipment, elevators,
  elevator machinery, flues, and similar fixed equipment. The  weights  of
  such  equipment  (or  the  allowances therefor) shall be included in the
  dead load. The weight of equipment that is part of the  occupancy  of  a
  given  area  shall be considered as live load. See also paragraph two of
  subdivision (b) and subdivision (d) of section 27-557 of  article  three
  of this subchapter.