N.Y.C. Admin. Code § PC 307: Section PC 307: Structural Safety

307.1 General.

In the process of installing or repairing any part of a plumbing and drainage installation, the finished floors, walls, ceilings, tile work or any other part of the building or premises that must be changed or replaced shall be left in a safe structural condition in accordance with the requirements of the New York city building code.

307.2 Loading.

Alterations resulting in the addition of loads to any member, such as appliances and equipment, shall not be permitted without verification that the members are capable of supporting such additional loading.

307.3 Cutting, notching and boring.

The cutting, notching and boring of structural elements shall be in accordance with the limitations specified in

Appendix C

.

307.4 Penetrations of floor/ceiling assemblies and fire-resistance-rated assemblies.

Penetrations of floor/ceiling assemblies and assemblies required to have a fire-resistance rating shall be protected in accordance with the

New York City Building Code

.

307.5 Trusses.

Truss members of any material and components shall not be cut, drilled, notched, spliced or otherwise altered in any way without written concurrence and approval of a registered design professional.

307.6 Protection of footings.

Trenching installed parallel to footings and walls shall not extend into the bearing plane of a footing or wall. The upper boundary of the bearing plane is a line that extends downward, at an angle of 34 degrees (1:1.5 slope) from horizontal, from the outside bottom edge of the footing or wall.

307.7 Piping materials exposed within plenums.

Piping materials exposed within plenums shall comply with the provisions of the

New York City

Mechanical Code

.