N.Y.C. Admin. Code § PC 902: Section PC 902: Materials

902.1 Vents.

The materials and methods utilized for the construction and installation of venting systems shall comply with the applicable provisions of Section 702.

902.2 Sheet copper.

Sheet copper for vent pipe flashings shall conform to ASTM B 152 and shall weigh not less than 8 ounces per square foot (2.5 kg/m

2

).

902.3 Sheet lead.

Sheet lead for vent pipe flashings shall weigh not less than 3 pounds per square foot (15 kg/m

2

) for field-constructed flashings and not less than 2 1/2 pounds per square foot (12 kg/m

2

) for prefabricated flashings.