2006 New York Code - Construction.

 
    §  27-462 Construction. All materials used in the construction of open
  parking structures shall be noncombustible.  Columns  in  parking  areas
  shall  comply  with the provisions of section 27-559 of article three of
  subchapter nine of this chapter. Interior finishes shall be class A. The
  minimum clear height of any parking tier shall be at least six feet  six
  inches.
    (a)  Below  grade.  Any portion of an open parking structure extending
  below grade shall comply with all of the requirements for public garages
  as provided in article ten of this subchapter.