1305.9.1 Shaft enclosure.
MC § 1305.9.1
The piping from a transfer pump to equipment at levels above the lowest floor or storage tanks at levels above the lowest floor in buildings, the return or overflow piping, and vent piping where required to be connected to the main storage tank shall be enclosed in a shaft constructed of 4-inch (101.6 mm) concrete or masonry having a 4-inch (101.6 mm) clearance from all pipe or pipe covering in accordance with the New York City Building Code. Multiple fuel oil risers serving multiple systems are permitted within a common shaft enclosure. All shaft penetrations shall be fire stopped. Exceptions: 1. An enclosure shall not be required for piping located within the same room as the pump, tank, or equipment where such room is itself enclosed with construction and materials having at least a 2-hour fire-resistance rating.
2.An enclosure shall not be required for outdoor piping in existing buildings in compliance with Section 1305.9.13.
3.A concrete or masonry shaft enclosure shall not be required for metallic double wall flexible fuel-oil piping installed in a shaft enclosure having a fire-resistance rating of at least 2-hours and that complies with Sections 703.2 and 708 of the New York City Building Code.
