{"data":{"id":"us-nyc/n.y.c.-admin.-code-bc-r103","jurisdiction":"us-nyc","citation":"N.Y.C. Admin. Code § BC R103","heading":"Section BC R103: Modifications to ASTM C 636 – Standard Practice for Installation of Metal Ceiling Suspension systems for Acoustical Tile and Lay-in Panels","body":"R103.1 ASTM C 636, Section 2.1.3.\n\nDelete Section 2.1.3 and replace as follows:\n\n2.1.3 Hangers shall be spaced a maximum of 4'-6\" (1372 mm) on center. Each hanger shall be capable of supporting the suspended load in accordance with the provisions of this code. If local situations require greater center distances between hangers, the load-carrying capacity of the ceiling suspension system shall be reduced commensurate with the actual center-to-center hanger distances used.\n\nR103.2 ASTM C 636, Section 2.1.4.\n\nDelete Section 2.1.4 and replace as follows:\n\n2.1.4 Hangers shall be designed to support the suspended loads and shall be a minimum 1/4\" (6.4 mm) diameter galvanized steel rods or 1\" x 1/8\" thick (25 mm x 3.2 mm) flat steel bars. The use of steel wire as a hanger shall not be permitted.\n\nR103.3 ASTM C 636, Figure 1.\n\nDelete Figure 1 and replace as follows:\n\nFigure 1A Hanger Connection Details for Construction Groups I and I*\n\nFigure 1B Hanger Connection Details for Construction Groups I and II\n\nR103.4 ASTM C 636, Section 2.1.5.\n\nDelete Section 2.1.5 and replace as follows:\n\n2.1.5 Each connection of a hanger to a structural member of the building shall be in accordance with Section 2.1.5.1 or 2.1.5.2 as applicable.\n\n2.1.5.1 Construction types I and II. In buildings of Types I and II construction, hangers shall be attached to the structure of the building in accordance with the applicable structural systems indicated in Figures 1A and 1B.\n\n2.1.5.2 Construction types III, IV, and V. Every other hanger supported from wood structural members of the building shall be attached by two 1/4\" (6.4 mm) diameter through bolts or clinched nails. However, every other hanger shall be permitted to be attached by two 1/4\" (6.4 mm) diameter barbed anchor nails 2 1/4\" (57 mm) long with oval heads. All bolts and nails shall be inserted at least 2 inches above the bottom of the wood members.\n\nR103.5 ASTM C 636, Section 2.1.6.\n\nDelete Section 2.1.6 and replace as follows:\n\n2.1.6 Existing hangers shall not be used unless they comply, or are made to comply, with all of the provisions of this code relating to hangers.\n\nR103.6 ASTM C 636, Section 2.1.7.\n\nDelete Section 2.1.7 and replace as follows:\n\n2.1.7 Carrying channels shall be attached to hangers in a manner that will prevent any vertical movement or rotation. If hangers are secured to special attachment devices that support the carrying channels, such devices shall have certified load test data from an approved testing agency and shall be capable of carrying four times the design load.\n\nR103.7 ASTM C 636, Section 2.2.3.\n\nDelete Section 2.2.3 and replace as follows:\n\n2.2.3 Local kinks or bends shall not be made in hangers as a means of leveling the carrying channels.\n\nR103.8 ASTM C 636, Section 2.2.4.\n\nDelete Section 2.2.4 and replace as follows:\n\n2.2.4 Carrying channels shall be designed to support the suspended loads, and shall be a minimum 1 1/2\" deep (38 mm) cold-rolled steel channel weighing 0.440 pounds per linear foot (0.681 kg/m) and shall be given an electro-galvanized, hot-dipped galvanized cadmium coating, or zinc coating.\n\nR103.9 ASTM C 636, Section 2.\n\nDelete Section 2.3.1 and replace as follows:\n\n2.3.1 Main runners shall be installed such that they are level within 1/8 inch vertical in 12 feet horizontal when the main runner is in firm contact with the carrying channel.\n\nR103.10 ASTM C 636, Section 2.3.2.\n\nDelete Section 2.3.2 and replace as follows:\n\n2.3.2 Main runners shall be supported from the carrying channels. Direct hung suspension systems where the main runners are supported directly to the existing structure shall not be permitted. Indirect hung or furring bar suspension systems designed and installed in accordance with this code and utilizing carrying channels shall be permitted.\n\nR103.11 ASTM C 636, Section 2.3.3.\n\nDelete Section 2.3.3 and replace as follows:\n\n2.3.3 Main runners shall be attached to the carrying channels in a manner that will prevent any vertical movement or rotation.\n\nR103.12 ASTM C 636, Section 2.\n\nDelete Section 2.3.4 and Figure 2 and replace as follows:\n\n2.3.4 If the main runners are supported from the carrying channels by special devices, such devices shall be capable of carrying four times the design load. The devices shall be load tested by an approved testing agency that shall certify the devices are in compliance with this code. Such certifications shall be made available to the department and the applicant of record upon request.\n\nR103.13 ASTM C 636, Section 2.7.2.\n\nModify Section 2.7.2 to read as follows:\n\n2.7.2 Fixtures shall not be supported from main runners if the weight of the fixture causes the total dead load to exceed the deflection capability of the ceiling suspension system. Fixtures exceeding 80 lbs (36 kg) in weight shall be supported independent of the ceiling suspension system. Fixtures weighing 80 lbs (36 kg) or less may be supported from the carrying channels. Fixtures weighing 50 lbs (23 kg) or less may be supported from the main runners. Cross runners shall not be used to support fixtures.\n\nR103.14 ASTM C 636, Section 2.7.5.\n\nAdd Section 2.7.5 to read as follows:\n\n2.7.5 The construction documents shall show the necessary details of the acoustical ceiling to identify the number, size, spacing, location, weights, and types of fixtures and means employed to comply with these requirements.","path":["New York City Administrative Code","Title 28","Chapter 7: New York City Building Code"],"source_url":"https://files.amlegal.com/pdffiles/NewYorkCity/Admin/XML.zip","current_through":"Local Law 2026/135 (enacted August 31, 2026)","vintage":"","retrieved_at":"2026-09-06T02:48:57Z","sha256":"63027d335a5f49c6aefc8f191a2688a5e63b7a5b754398584371304e9ead3324","source_id":"us-nyc","stale":false,"prev":"us-nyc/n.y.c.-admin.-code-bc-r102","next":"us-nyc/n.y.c.-admin.-code-bc-s101"},"notice":"GroundRules: Original legal text. Not legal advice."}