N.Y.C. Admin. Code § EBC A102: Section EBC A102: Masonry Wall Connections

A102.1 Connection locations.

Unreinforced masonry walls shall be connected at the roof and floor levels.

A102.1.1 Connection requirements.

Connections shall consist of existing connections and/or new connections. New connections shall be as shown in Figures A1-1, A1-2, or A1-3 where applicable, and provided at a maximum plan spacing of 5 feet and 4 inches (1625 mm) on center. A registered design professional can provide alternative anchor spacings and details for loads conforming to the New York City Building Code. All wall connections shall be secured to the framing members parallel or perpendicular to the wall. Cross-grain bending in wood members used for wall connections is prohibited.

A102.2 Minimum wall connection capacity.

Connection of walls to each floor or roof shall be able to resist a minimum service load of 200 pounds per linear foot (2919 N/m), acting normal to the wall at the level of the floor or roof. Existing wall connections, if used, must meet the requirements of this chapter, or must be supplemented with new connections to comply with requirements.

A102.2.1 Existing wall connections capacity.

Existing connections used as all or part of the required wall connections shall be considered to have a service tension capacity of 100 pounds (445 N), unless tested or evaluated by a registered design professional. Friction shall be neglected in determining existing connection capacity.

A102.2.2 Wall connections per Chapter 33 of the New York City Building Code.

Wall connections installed as required by Section 3309 and attached to joists in a manner similar to Figure A1-1 may be deemed to comply with the requirements of this Appendix.

A102.3 Wall connection testing and inspection.

New wall connections shall be tested and inspected in accordance with the requirements of Chapter 17 of the New York City Building Code, and as required by the connection manufacturer. Testing of existing wall connections, if required, shall be specified and evaluated by a registered design professional.

A102.4 Existing wall wythe bonding and pattern.

A registered design professional shall confirm that the existing exterior wall wythes that are being anchored are properly bonded together. If wythes are not properly bonded together, or the bonding pattern of wythes is different from header courses every sixth course, a registered design professional shall evaluate the conditions and design repairs if required.