N.Y.C. Admin. Code § EBC A402: Section EBC A402: Prescriptive Requirements

A402.1 General.

A new steel moment frame shall be added at the soft story. The moment frame shall be located in the plane of the wall opening. The minimum permitted member sizes and connection details for the prescriptive steel posts and beams for the moment frame are shown in Figures A4-1 through A4-7.

A402.2 Beam-to-post moment connections.

All connections between beams and posts in the moment frame shall be able to develop moment resistance in the connected beams and post ends per Figures A4-4 and A4-5.

A402.3 Post base plates.

Posts shall be anchored to the existing foundation wall with base plates and adhesive anchors. The base plate connection detail shall comply with Figures A4-1 and A4-7.

A402.4 Connections of existing walls to new posts.

The existing walls adjacent to new posts shall be anchored to the new posts per Figures A4-1 and A4-6. Additional requirements of the post-installed anchor manufacturer shall apply.

A402.5 Other applicable requirements of the New York City Building Code.

The use of the prescriptive solution for a soft story does not preclude adherence to other applicable provisions of the New York City Building Code, including special inspections and fire resistance, weather protection, as well as maintaining stability of the building during construction by means of temporary shoring and/or bracing.

Figure A4-1 Soft Story at First Floor Level Prescriptive Remedial Moment Frame

Figure A4-2 Notes for Fig. A4-1 and Proposed Remedial Sequence

Figure A4-3 Soft Story at First Floor Level Section at Top of Steel Frame

Figure A4-4 Soft Story at First Floor Section of Beams and Post Connection

Figure A4-5 Soft Story at First Floor Level Elevation of Beam and Post Connection

Figure A4-6 Soft Story at First Floor Level Section at Masonry Connection to Post

Figure A4-7 Soft Story at First Floor Level Plan View of Baseplate