Glass and Glazing

NYC Admin. Code tit. 28, ch. 7, art. 701, ch. 24

in effect

NYC Building Code § BC 2401 General

Section BC 2401: General 2401.1 Scope. The provisions of this chapter shall govern the materials, design, construction and quality of glass, light transmitting ceramic and light-transmitting plastic panels for exterior and interior use in both vertical and sloped applications in buildings and structures. 2401.2 Glazing replacement. The installation of replacement glass shall be as required for new installations. See Sections 28-101.4.1, 28-101.4.2, 28-101.4.3 and 28-101.4.4 of the Administrative Code for requirements relating to prior code buildings. Exception: Permit or inspection is not required for certain glazing repair or replacement work as described in Title 1 of the Rules of the City of New York.

NYC Building Code § BC 2402 Definitions

Section BC 2402: Definitions 2402.1 Definitions. The following terms are defined in Chapter 2: DALLE GLASS. DECORATIVE GLASS. SIDELITES. TRANSPARENT. TRANSPARENT DOOR. TRANSPARENT SAFETY GLAZING MATERIALS.

NYC Building Code § BC 2403 General Requirements for Glass

Section BC 2403: General Requirements for Glass 2403.1 Identification. Each pane shall bear the manufacturer's label designating the type and thickness of the glass or glazing material. The identification shall not be omitted unless approved and an affidavit is furnished by the glazing contractor certifying that each lite is glazed in accordance with approved construction documents that comply with the provisions of this chapter. Safety glazing shall be identified in accordance with Section 2406.3. Each pane of tempered glass shall be permanently identified by the manufacturer. The identification label shall be acid etched, sand blasted, ceramic fired, laser etched, embossed or of a type that, once applied, cannot be removed without being destroyed. Exception: Tempered spandrel glass shall be permanently labeled unless doing so would weaken, alter the performance of, or cause breakage of the spandrel glass, as determined by the manufacturer. Where the manufacturer makes such a determination, the tempered spandrel glass shall be provided with a removable paper marking by the manufacturer, and an affidavit shall be provided in accordance with this section. 2403.2 Glass supports. Where one or more sides of any pane of glass are not firmly supported, or are subjected to unusual load conditions, or as requested by the applicant, detailed construction documents, detailed shop drawings and analysis or test data ensuring safe performance for the specific installation shall be prepared by a registered design professional. 2403.3 Framing. To be considered firmly supported, the framing members for each individual pane of glass shall be designed so the deflection of the edge of the glass perpendicular to the glass pane shall not exceed 1/175 of the glass edge length or 3/4 inch (19.1 mm), whichever is less, when subjected to the larger of the positive or negative load where loads are combined as specified in Section 1605. Gaskets, washers, shims, seals or spacers shall be used where required to prevent contact of glass to metal components in framing and supports. The system shall allow for movement. 2403.4 Interior glazed areas. Where interior glazing is installed adjacent to a walking surface, the differential deflection of two adjacent unsupported edges shall not be greater than the thickness of the panels when a force of 50 pounds per linear foot (plf) (730 N/m) is applied horizontally to one panel at any point up to 42 inches (1067 mm) above the walking surface. 2403.5 Louvered windows or jalousies. Float, wired and patterned glass in louvered windows and jalousies shall be no thinner than nominal 3/16 inch (4.8 mm) and no longer than 48 inches (1219 mm). Exposed glass edges shall be smooth. Wired glass with wire exposed on longitudinal edges shall not be used in louvered windows or jalousies. Where other glass types are used, the design shall be submitted to the department for approval.

NYC Building Code § BC 2404 Wind, Snow, Seismic and Dead Loads on Glass

Section BC 2404: Wind, Snow, Seismic and Dead Loads on Glass 2404.1 Vertical glass. Glass sloped 15 degrees (0.26 rad) or less from vertical in windows, curtain walls and window walls, doors and other exterior applications shall be designed to resist the wind loads in accordance with Chapter 16 for components and cladding. Glass in glazed curtain walls, glazed storefronts and glazed partitions shall meet the seismic requirements of ASCE 7, Section 13.5.9, as modified by Chapter 16. The load resistance of glass under uniform load shall be determined in accordance with ASTM E 1300. The glass breakage probability for load resistance shall be less than or equal to 8 lites per 1,000. The design of vertical glazing shall be based on Equation 24-1. 0.6Fgw ≤ Fga (Equation 24-1) where: Fgw = Wind load on the glass due to basic design wind speed, V, computed in accordance with Section 1609. Fga = Short duration load on the glass as determined in accordance with ASTM E 1300. 2404.2 Sloped glass. Glass sloped more than 15 degrees (0.26 rad) from vertical in skylights, sunrooms, sloped roofs and other exterior applications shall be designed to resist the most critical combinations of loads as determined by Equations 24-2, 24-3 and 24-4. Fg = 0.6Wo - D (Equation 24-2) Fg = 0.6Wi + D + 0.5S (Equation 24-3) Fg = 0.3Wi + D + S (Equation 24-4) where: D = Glass dead load psf (kN/m2). For glass sloped 30 degrees (0.52 rad) or less from horizontal, = 13 tg (For SI: 0.0245 tg) For glass sloped more than 30 degrees (0.52 rad) from horizontal, = 13 tg cos θ (For SI: 0.0245 tg cos θ). Fg = Total load, psf (kN/m2) on glass. S = Snow load, psf (kN/m2) as determined in Section 1608. tg = Total glass thickness, inches (mm) of glass panes and plies. Wi = Inward wind force, psf (kN/m2) due to basic design wind speed, V, as calculated in Section 1609. Wo = Outward wind force, psf (kN/m2) due to basic design wind speed, V, as calculated in Section 1609. θ = Angle of slope from horizontal. Exception: The performance grade rating of unit skylights and tubular daylighting devices shall be determined in accordance with Section 2405.5. The design of sloped glazing shall be based on Equation 24-5. Fg ≤ Fga (Equation 24-5) where: Fg = Total load on the glass determined by Equations 24-2, 24-3 and 24-4. Fga = Short duration load resistance of the glass as determined in accordance with ASTM E 1300 for Equations 24-2 and 24-3; or the long duration load resistance of the glass as determined in accordance with ASTM E 1300 for Equation 24-4. 2404.3 Wired, patterned and sandblasted glass. 2404.3.1 Vertical wired glass. Wired glass sloped 15 degrees (0.26 rad) or less from vertical in windows, curtain and window walls, doors and other exterior applications shall be designed to resist the wind loads in Section 1609 for components and cladding according to the following equation: 0.6Fgw < 0.5Fge where: Fgw = Wind load on the glass due to basic design wind speed, V, computed in accordance with Section 1609. Fge = Nonfactored load from ASTM E 1300 using a thickness designation for monolithic glass that is not greater than the thickness of wired glass. 2404.3.2 Sloped wired glass. Wired glass sloped more than 15 degrees (0.26 rad) from vertical in skylights, sunspaces, sloped roofs and other exterior applications shall be designed to resist the most critical of the combinations of loads from Section 2404.2. For Equations 24-2 and 24-3: Fg < 0.5Fge (Equation 24-7) For Equation 24-4: Fg < 0.3Fge (Equation 24-8) where: Fg = Total load on the glass as determined by Equations 24-2, 24-3 and 24-4. Fge = Nonfactored load in accordance with ASTM E 1300. 2404.3.3 Vertical patterned glass. Patterned glass sloped 15 degrees (0.26 rad) or less from vertical in windows, curtain and window walls, doors and other exterior applications shall be designed to resist the wind loads in Section 1609 for components and cladding according to Equation 24-9. Fgw < 1.0Fge (Equation 24-9) where: Fgw = Wind load on the glass due to basic design wind speed, V, computed in accordance with Section 1609. Fge = Nonfactored load in accordance with ASTM E 1300. The value for patterned glass shall be based on the thinnest part of the glass. Interpolation between nonfactored load charts in ASTM E 1300 shall be permitted. 2404.3.4 Sloped patterned glass. Patterned glass sloped more than 15 degrees (0.26 rad) from vertical in skylights, sunspaces, sloped roofs and other exterior applications shall be designed to resist the most critical of the combinations of loads from Section 2404.2. For Equations 24-2 and 24-3: Fg < 1.0Fge (Equation 24-10) For Equation 24-4: Fg < 0.6Fge (Equation 24-11) where Fg = Total load on the glass as determined by Equations 24-2, 24-3 and 24-4. Fge = Nonfactored load in accordance with ASTM E 1300. The value for patterned glass shall be based on the thinnest part of the glass. Interpolation between the nonfactored load charts in ASTM E 1300 shall be permitted. 2404.3.5 Vertical sandblasted glass. Sandblasted glass sloped 15 degrees (0.26 rad) or less from vertical in windows, curtain and window walls, doors, and other exterior applications shall be designed to resist the wind loads in Section 1609 for components and cladding according to Equation 24-12. 0.6Fgw < 0.5Fge (Equation 24-12) where: Fgw = Wind load on the glass due to basic design wind speed, V, computed in accordance with Section 1609. Fge = Nonfactored load in accordance with ASTM E 1300. The value for sandblasted glass is for moderate levels of sandblasting. 2404.4 Other designs. For designs outside the scope of this section, an analysis or test data for the specific installation shall be prepared by a registered design professional.

NYC Building Code § BC 2405 Sloped Glazing and Skylights

Section BC 2405: Sloped Glazing and Skylights 2405.1 Scope. This section applies to the installation of glass and other transparent, translucent or opaque glazing material installed at a slope more than 15 degrees (0.26 rad) from the vertical plane, including glazing materials in skylights, roofs and sloped walls. 2405.2 Allowable glazing materials and limitations. Sloped glazing shall be any of the following materials, subject to the listed limitations. 1. For monolithic glazing systems, the glazing material of the single lite or layer shall be laminated glass with a minimum 30-mil (0.76 mm) polyvinyl butyral (or equivalent) interlayer, wired glass, light-transmitting plastic materials meeting the requirements of Section 2607. 2. For multiple-layer glazing systems, the exterior layer shall be fully tempered glass and the bottom layer shall consist of any of the glazing materials specified in Item 1 above. Annealed glass is permitted to be used as specified in Exceptions 2 and 3 of Section 2405.3. Heat-strengthened glass or fully tempered monolithic glass is permitted to be used with screens, as specified in Section 2405.3. For additional requirements for plastic skylights, see Section 2610. Glass-block construction shall conform to the requirements of Section 2110.1. 2405.3 Screening. Where used in monolithic glazing systems, heat-strengthened and fully tempered glass shall have screens installed below the glazing material. The screens and their fastenings shall: (i) be capable of supporting twice the weight of the glazing; (ii) be firmly and substantially fastened to the framing members and (iii) be installed within 4 inches (102 mm) of the glass. The screens shall be constructed of a noncombustible material not thinner than No. 12 B&S gage (0.0808 inch) with mesh not larger than 1 inch by 1 inch (25 mm by 25 mm). In a corrosive atmosphere, structurally equivalent noncorrosive screen materials shall be used. Heat-strengthened glass, fully tempered glass and wired glass, when used in multiple-layer glazing systems as the bottom glass layer over the walking surface, shall be equipped with screening that conforms to the requirements for monolithic glazing systems. Exception: In monolithic and multiple-layer sloped glazing systems, the following applies: 1. Fully tempered glass installed without protective screens where glazed between intervening floors at a slope of 30 degrees (0.52 rad) or less from the vertical plane shall have the highest point of the glass 10 feet (3048 mm) or less above the walking surface. 2. Screens are not required below any glazing material, including annealed glass, where the walking surface below the glazing material is permanently protected from the risk of falling glass or the area below the glazing material is not a walking surface. 3. Any glazing material, including annealed glass, is permitted to be installed without screens in the sloped glazing systems of commercial or detached noncombustible greenhouses used exclusively for growing plants and not open to the public, provided that the height of the greenhouse at the ridge does not exceed 30 feet (9144 mm) above grade. 4. Screens shall not be required in individual dwelling units in Occupancy Groups R-2 and R-3 where fully tempered glass is used as single glazing or as both panes in an insulating glass unit, and the following conditions are met: 4.1. Each pane of the glass is 16 square feet (1.5 m2) or less in area. 4.2. The highest point of the glass is 12 feet (3658 mm) or less above any walking surface. 4.3. The glass thickness is 3/16 inch (4.8 mm) or less. 5. Screens shall not be required for laminated glass with a 15-mil (0.38 mm) polyvinyl butyral (or equivalent) interlayer used in individual dwelling units in Occupancy Groups R-2 and R-3 within the following limits: 5.1. Each pane of glass is 16 square feet (1.5 m2) or less in area. 5.2. The highest point of the glass is 12 feet (3658 mm) or less above a walking surface. 2405.4 Framing. In Type I and II construction, sloped glazing and skylight frames shall be constructed of noncombustible materials. In structures where acid fumes deleterious to metal are incidental to the use of the buildings, approved pressure-treated wood or other approved noncorrosive materials are permitted to be used for sash and frames. Framing supporting sloped glazing and skylights shall be designed to resist the tributary roof loads in Chapter 16. Skylights set at an angle of less than 45 degrees (0.79 rad) from the horizontal plane shall be mounted not less than 4 inches (102 mm) above the plane of the roof on a curb constructed as required for the frame. Skylights shall not be installed in the plane of the roof where the roof pitch is less than 45 degrees (0.79 rad) from the horizontal. Exception: Installation of a skylight without a curb shall be permitted on roofs with a minimum slope of 14 degrees (three units vertical in 12 units horizontal) in Group R-3 occupancies. All unit skylights installed in a roof with a pitch flatter than 14 degrees (0.24 rad) shall be mounted not less than 4 inches (102 mm) above the plane of the roof on a curb constructed as required for the frame unless otherwise specified in the manufacturer's instructions. 2405.5 Unit skylights and tubular daylighting devices. Unit skylights and tubular daylighting devices shall be tested and labeled as complying with AAMA/WDMA/CSA 101/I.S.2/A440. The label shall state the name of the manufacturer, the approved agency, the product designation and the performance grade rating as specified in AAMA/WDMA/CSA 101/I.S.2/A440. Where the product manufacturer has chosen to have the performance grade of the skylight rated separately for positive and negative design pressure, then the label shall state both performance grade ratings as specified in AAMA/WDMA/CSA 101/I.S.2/A440 and the skylight shall comply with Section 2405.5.2. Where the skylight is not rated separately for positive and negative pressure, then the performance grade rating shown on the label shall be the performance grade rating determined in accordance with AAMA/WDMA/CSA 101/I.S.2/A440 for both positive and negative design pressure and the skylight shall conform to Section 2405.5.1. 2405.5.1 Skylights rated for the same performance grade for both positive and negative design pressure. The design of skylights shall be based on Equation 24-13. Fg ≤ PG (Equation 24-13) where: Fg = Maximum load on the skylight determined from Equations 24-2 through 24-4 in Section 2404.2. PG = Performance grade rating of the skylight 2405.5.2 Skylights rated for separate performance grades for positive and negative design pressure. The design of skylights rated for performance grade for both positive and negative design pressures shall be based on Equations 24-14 and 24-15. Fgi ≤ PGPos (Equation 24-14) Fgo ≤ PGNeg (Equation 24-15) where: PGPos = Performance grade rating of the skylight under positive design pressure; PGNeg = Performance grade rating of the skylight under negative design pressure; and Fgi and Fgo are determined in accordance with the following: For 0.6Wo ≥ D, where: Wo = Outward wind force, psf (kN/m2) due to basic design wind speed, V, as calculated in Section 1609. D = The dead weight of the glazing, psf (kN/m2) as determined in Section 2404.2 for glass, or by the weight of the plastic, psf (kN/m2) for plastic glazing. Fgi = Maximum load on the skylight determined from Equations 24-3 and 24-4 in Section 2404.2. Fgo = Maximum load on the skylight determined from Equation 24-2. For 0.6Wo < D, where: Wo = The outward wind force, psf (kN/m2) due to basic design wind speed, V, as calculated in Section 1609. D = The dead weight of the glazing, psf (kN/m2) as determined in Section 2404.2 for glass, or by the weight of the plastic for plastic glazing. Fgi = Maximum load on the skylight determined from Equations 24-2 through 24-4 in Section 2404.2. Fgo = 0.

NYC Building Code § BC 2406 Safety Glazing

Section BC 2406: Safety Glazing 2406.1 Human impact loads. Individual glazed areas, including glass mirrors, in hazardous locations as defined in Section 2406.4 shall comply with Sections 2406.1.1 through 2406.1.4. Exception: Mirrors and other glass panels mounted or hung on a surface that provides a continuous backing support. 2406.1.1 Impact Test. Except as provided in Sections 2406.1.2 through 2406.1.4, all glazing shall pass the impact test requirements of Section 2406.2. 2406.1.2 Plastic glazing. Plastic glazing shall meet the weathering requirements of ANSI Z97.1. 2406.1.3 Glass block. Glass-block walls shall comply with Section 2101.2.5. 2406.1.4 Louvered windows and jalousies. Louvered windows and jalousies shall comply with Section 2403.5. 2406.2 Impact test. Where required by other sections of this code, glazing shall be tested in accordance with CPSC 16 CFR Part 1201. Glazing shall comply with the test criteria for Category II, unless otherwise indicated in Table 2406.2(1). Table 2406.2(1) Minimum Category Classification of Glazing Using CPSC 16 CFR 1201 Exposed Surface Area of One Side of One Lite Glazing in Storm or Combination Doors (Category class) Glazing in Doors (Category class) Glazed Panels Regulated by Section 2406.4.3 (Category class) Glazed Panels Regulated by Section 2406.4.2 (Category class) Doors and Enclosures Regulated by Section 2406.4.5 (Category class) Sliding Glass Doors Patio Type (Category class) 9 square feet or less I I No requirement I II II More than 9 square feet II II II II II II For SI: 1 square foot = 0.0929 m2. Exception: Glazing not in doors or enclosures for hot tubs, whirlpools, saunas, steam rooms, bathtubs and showers shall be permitted to be tested in accordance with ANSI Z97. 1. Glazing shall comply with the test criteria for Class A, unless otherwise indicated in Table 2406.2(2). Table 2406.2(2) Minimum Category Classification of Glazing Using ANSI Z97.1 Exposed Surface Area of One Side of One Lite Glazed Panels Regulated by Section 2406.4.3 (Category class) Glazed Panels Regulated by Section 2406.4.2 (Category class) Doors and Enclosures Regulated by Section 2406.4.5 a (Category class) 9 square feet or less No requirement B A More than 9 square feet A A A For SI: 1 square foot = 0.0929 m2. a. Use is only permitted by the exception to Section 2406.2. (Am. L.L. 2023/077, 6/11/2023, eff. 6/11/2023) Editor's note: For related unconsolidated provisions, see Appendix A at L.L. 2023/077. 2406.3 Identification of safety glazing. Except as indicated in Section 2406.3.1, each pane of safety glazing installed in hazardous locations shall be identified by a label specifying the labeler, the manufacturer or installer and the safety glazing standard with which it complies, as well as the information specified in Section 2403.1. A label as defined in Section 202 and meeting the requirements of this section shall be permitted in lieu of the manufacturer's designation. Exceptions: 1. For other than tempered glass, labels are not required, provided the department approves the use of a certificate, affidavit or other evidence confirming compliance with this code. 2. Tempered spandrel glass shall be identified in accordance with Section 2403.1. 2406.3.1 Multi-pane assemblies. Multi-pane glazed assemblies having individual panes not exceeding 1 square foot (0.09 m2) in exposed areas shall have at least one pane in the assembly marked as indicated in Section 2406.3. Other panes in the assembly shall be marked "CPSC 16 CFR Part 1201" or "ANSI Z97.1", as appropriate. 2406.4 Hazardous locations. The locations specified in Sections 2406.4.1 through 2406.4.7 shall be considered to be specific hazardous locations requiring safety glazing materials. 2406.4.1 Glazing in doors. Glazing in all fixed and operable panels of swinging, sliding and bifold doors shall be considered a hazardous location. Exceptions: 1. Glazed openings of a size through which a 3-inch diameter (76 mm) sphere is unable to pass. 2. Decorative glazing. 3. Glazing materials used as curved glazed panels in revolving doors. 4. Commercial refrigerated cabinet glazed doors. 2406.4.2 Glazing adjacent to doors. Glazing in an individual fixed or operable panel adjacent to a door where the nearest vertical edge of the glazing is within a 24-inch (610 mm) arc of either vertical edge of the door in a closed position and where the bottom exposed edge of the glazing is less than 60 inches (1524 mm) above the walking surface shall be considered a hazardous location. Exceptions: 1. Decorative glazing. 2. Where there is an intervening wall or other permanent barrier between the door and glazing. 3. Where access through the door is to a closet or storage area 3 feet (914 mm) or less in depth. Glazing in this application shall comply with Section 2406.4.3. 4. Glazing in walls on the latch side of and perpendicular to the plane of the door in a closed position in one- and two-family dwellings or within dwelling units in Group R-2 occupancies. 2406.4.3 Glazing in windows. Glazing in an individual fixed or operable panel that meets all of the following conditions shall be considered to be a hazardous location: 1. The exposed area of an individual pane is greater than 9 square feet (0.84 m2). 2. The bottom edge of the glazing is less than 18 inches (457 mm) above the floor. 3. The top edge of the glazing is greater than 36 inches (914 mm) above the floor. 4. One or more walking surface(s) are within 36 inches (914 mm), measured horizontally and in a straight line, of the plane of the glazing. Exceptions: 1. Decorative glazing. 2. Where a horizontal rail is installed on the accessible side(s) of the glazing 34 to 38 inches (864 to 965 mm) above the walking surface. The rail shall be capable of withstanding a horizontal load of 50 pounds per linear foot (730 N/m) without contacting the glass and be not less than 1 1/2 inches (38 mm) in cross-sectional height. 3. Outboard panes in insulating glass units or multiple glazing where the bottom exposed edge of the glass is 25 feet (7620 mm) or more above any grade, roof, walking surface or other horizontal or sloped (within 45 degrees of horizontal) (0.79 rad) surface adjacent to the glass exterior. 2406.4.4 Glazing in guards and railings. Glazing in guards and railings, including structural baluster panels and nonstructural in-fill panels, regardless of area or height above a walking surface, shall be considered to be a hazardous location. 2406.4.5 Glazing and wet surfaces. Glazing in walls, enclosures or fences containing or facing hot tubs, spas, whirlpools, saunas, steam rooms, bathtubs, showers and indoor or outdoor swimming pools where the bottom exposed edge of the glazing is less than 60 inches (1524 mm) measured vertically above any standing or walking surface shall be considered a hazardous location. This shall apply to single glazing and all panes in multiple glazing. Exception: Glazing that is more than 60 inches (1524 mm), measured horizontally and in a straight line, from the water's edge of a bathtub, hot tub, spa, whirlpool or swimming pool. 2406.4.6 Glazing adjacent to stairways and ramps. Glazing where the bottom exposed edge of the glazing is less than 60 inches (1524 mm) above the plane of the adjacent walking surface of stairways, landings between flights of stairs and ramps shall be considered a hazardous location. Exceptions: 1. The side of a stairway, landing or ramp that has a guard complying with the provisions of Sections 1015 and 1607.8, and the plane of the glass is greater than 18 inches (457 mm) from the railing. 2. Glazing 36 inches (914 mm) or more measured horizontally from the walking surface. 2406.4.7 Glazing adjacent to the bottom stairway landing. Glazing adjacent to the landing at the bottom of a stairway where the glazing is less than 60 inches (1524 mm) above the landing and within a 60-inch (1524 mm) horizontal arc that is less than 180 degrees (3.14 rad) from the bottom tread nosing shall be considered a hazardous location. Exception: Glazing that is protected by a guard complying with Sections 1015 and 1607.8 where the plane of the glass is greater than 18 inches (457 mm) from the guard. 2406.5 Fire department access panels. Fire department glass access panels shall be of nonlaminated tempered glass. For insulating glass units, all panes shall be nonlaminated tempered glass. Exception: Fire department access panels that are openable and meeting size requirements of Section 903.2.11.1.

NYC Building Code § BC 2407 Glass In Handrails and Guards

Section BC 2407: Glass In Handrails and Guards 2407.1 Materials. Glass used as structural balustrade panels and in-fill panels in railings shall be laminated glass constructed of fully tempered or heat-strengthened glass and shall comply with Category II or CPSC 16 CFR Part 1201 or Class A of ANSI Z97.1. For all glazing types, the minimum nominal thickness shall be 1/4 inch (6.4 mm). Exception: For Group R-3 occupancies, single fully tempered glass complying with Category II of CPSC 16 CFR Part 1201 or Class A of ANSI Z97.1 shall be permitted to be used in handrails and guardrails where there is no walking surface beneath them or the walking surface is permanently protected from the risk of falling glass. 2407.1.1 Loads. The panels and their support system shall be designed to withstand the loads specified in Section 1607.8. Glass guard elements shall be designed using a factor of safety of four. (Am. L.L. 2023/077, 6/11/2023, eff. 6/11/2023) Editor's note: For related unconsolidated provisions, see Appendix A at L.L. 2023/077. 2407.1.2 Support and framing. Support and framing of glass used in handrails and guards shall comply with the requirements of Sections 2403.2 and 2403.3. In glass structural balustrade systems, each handrail or guard section shall be supported by no fewer than three glass balusters or shall be otherwise supported to remain in place should one baluster panel fail. Glass balusters shall not be installed without an attached handrail or guard. Exception: An attached top rail or handrail is not required when panels are tested to remain in place as a barrier following impact or glass breakage in accordance with ASTM E2353, and designed to withstand the loads specified in Section 1607.8. 2407.1.3 Parking garages. Glazing materials shall not be installed in handrails or guards in parking garages except for pedestrian areas not exposed to impact from vehicles. 2407.1.4 Glazing in wind-borne debris regions. Glazing installed in in-fill panels or balusters in wind-borne debris regions shall comply with the following: 2407.1.4.1 Balusters and in-fill panels. Glass installed in exterior railing in-fill panels or balusters shall be laminated glass complying with Category II of CPSC 16 CFR Part 1201 or Class A of ANSI Z97.1. 2407.1.4.2 Glass supporting top rail. When the top rail is supported by glass, the assembly shall be tested according to the impact requirements of Section 1609.1.2. The top rail shall remain in place after impact.

NYC Building Code § BC 2408 Glazing In Athletic Facilities

Section BC 2408: Glazing In Athletic Facilities 2408.1 General. Glazing in athletic facilities and similar uses subject to impact loads, which forms whole or partial wall sections or which is used as a door or part of a door, shall comply with this section. 2408.2 Racquetball and squash courts. Glazing in racquetball, squash courts and similar athletic facilities subject to impact loads shall comply with this section. 2408.2.1 Testing. Test methods and loads for individual glazed areas in racquetball and squash courts subject to impact loads shall conform to those of CPSC 16 CFR Part 1201 or ANSI Z97.1, with impacts being applied at a height of 59 inches (1499 mm) above the playing surface to an actual or simulated glass wall installation with fixtures, fittings and methods of assembly identical to those used in practice. Glass walls shall comply with the following conditions: 1. A glass wall in a racquetball or squash court, or similar use subject to impact loads, shall remain intact following a test impact. 2. The deflection of such walls shall be not greater than 1 1/2-inches (38 mm) at the point of impact for a drop height of 48 inches (1219 mm). Glass doors shall comply with the following conditions: 1. Glass doors shall remain intact following a test impact at the prescribed height in the center of the door. 2. The relative deflection between the edge of a glass door and the adjacent wall shall not exceed the thickness of the wall plus 1/2 inch (12.7 mm) for a drop height of 48 inches (1219 mm). 2408.3 Gymnasiums and basketball courts. Glazing in multipurpose gymnasiums, basketball courts and similar athletic facilities subject to human impact loads shall comply with Category II of CPSC 16 CFR Part 1201 or Class A of ANSI Z97.1.

NYC Building Code § BC 2409 Glass in Walkways, Elevator Hoistways and Elevator Cars

Section BC 2409: Glass in Walkways, Elevator Hoistways and Elevator Cars 2409.1 Glass walkways. Glass installed as floors, landings, stairs and in similar locations shall be designed and engineered by a registered design professional and the design shall include the applicable provisions of ASTM E 2751 and the load requirements of Chapter 16. Such assemblies shall comply with the fire-resistance rating and marking requirements of this code where applicable. 2409.2 Glass in elevator hoistway enclosures. Glass in elevator hoistway enclosures and hoistway doors shall be laminated glass conforming to ANSI Z97. 1 or CPSC 16 CFR Part 1201 and ASME A17.1, as modified by Appendix K of this code. 2409.2.1 Fire-resistance-rated hoistways. Glass installed in hoistways and hoistway doors where the hoistway is required to have a fire-resistance rating shall also comply with Section 716. 2409.3 Visions panels in elevator hoistway doors. Glass in vision panels in elevator hoistway doors shall be permitted to be any transparent glazing material not less than 1/4 inch (6.4 mm) in thickness conforming to Class A in accordance with ANSI Z97.1 or Category II in accordance with CPSC 16 CFR Part 1201. Glass in vision panels in elevator hoistway doors shall also comply with ASME A17.1, Section 2.11.7, as modified by Appendix K of this code for additional requirements. 2409.4 Glass in elevator cars. Glass in elevator cars shall be in accordance with ASME A17.1 section 2.14.1.8, as modified by Appendix K. (Am. L.L. 2023/077, 6/11/2023, eff. 6/11/2023) Editor's note: For related unconsolidated provisions, see Appendix A at L.L. 2023/077. 2409.4.1 Glass types. Glass in elevator car enclosures, glass elevator car doors and glass used for lining walls and ceilings of elevator cars shall be laminated glass conforming to Class A in accordance with ANSI Z97. 1 or Category II in accordance with CPSC 16 CFR Part 1201. See ASME A17.1, as modified by Appendix K of this code for additional requirements. (Am. L.L. 2023/077, 6/11/2023, eff. 6/11/2023) Editor's note: For related unconsolidated provisions, see Appendix A at L.L. 2023/077.

NYC Building Code § BC 2410 Marking of Transparent Doors and Fixed Adjacent Transparent Sidelites

Section BC 2410: Marking of Transparent Doors and Fixed Adjacent Transparent Sidelites 2410.1 Requirement. Transparent doors and fixed adjacent sidelites shall be marked in accordance with Sections 2410.3 through 2410.4. Exceptions: 1. One- and two-family dwellings. 2. Fixed adjacent transparent sidelites 20 inches (508 mm) or less in width with opaque stiles at least 1 3/4 inches (44 mm) in width. 3. Where the ground, floor or equivalent surface area in the path of approach to a fixed adjacent transparent sidelite from either side for a minimum distance of 3 feet (914 mm) from such sidelite is so arranged, constructed or designed as to deter persons from approaching such sidelite or a permanent barrier is installed in the path of approach, provided that: 3.1. Decorative pools, horticultural planting or similar installations shall be considered as indicating that the ground, floor or equivalent surface area is not a path of approach. 3.2. Planters, benches and similar barriers which are securely fastened to the floor or wall to prevent their removal shall be considered as blocking the path of approach provided they shall be not less than 18 inches (457 mm) in height from the ground, floor or equivalent surface and extend across at least 2/3 of the total width of the glazed area of the sidelight. 4. Fixed adjacent transparent sidelites which are supported by opaque sill and wall construction of at least 18 inches (457 mm) above the ground, floor or equivalent surface immediately adjacent. 5. Display windows in any establishment, building or structure which fall within the definition of a sidelite if the top of the supporting sill and wall construction is not less than 18 inches (457 mm) above the ground, floor or equivalent surface immediately adjacent and the interior area is occupied with merchandise or similar displays to clearly indicate to the public that it is not a means of ingress or egress. 6. Opaque door pulls or push bars extending across at least two-thirds of the total width of the glazed area. 2410.2 Locations. Transparent doors and fixed adjacent transparent sidelites shall be marked in two areas on the glass surface. One such area shall be located at least 30 inches (762 mm) but not more than 36 inches (914 mm) above the ground, floor or equivalent surface below the door or sidelite, and the other at least 60 inches (1524 mm) but not more than 66 inches (1676 mm) above the ground, floor or equivalent surface below the door or sidelite. Exception. The use of horizontal separation bars, muntin bars or other equivalent bars at least one and one-half inches in vertical dimension that extend across the total width of the glazed area and are located at least 40 inches (1016 mm) but not more than 50 inches (1270 mm) above the bottom of the door or sidelite is permitted in lieu of markings. 2410.3 Design. The marking design shall be at least 4 inches (102 mm) in diameter if circular or 4 inches (102 mm) in its least dimension if elliptical or polygonal, or shall be at least 12 inches (305 mm) in horizontal dimension if the marking is less than 4 inches (102 mm) in its least dimension. In no event shall the vertical dimension of any marking including lettering be less than 1 1/2 inches (38 mm) in height. 2410.4 Materials. Markings may be comprised of, but are not limited to: 1. Muntin bars, separation bars or other equivalent bars; 2. Chemical etching; 3. Sandblasting; 4. Adhesive strips; 5. Decals; or 6. Paint, gilding or other opaque marking materials.

Source: City of New York, Charter, Administrative Code and Rules (American Legal Publishing XML export, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/newyorkcity/latest/NYCadmin/0-0-0-182580Fetched: 10/24/2026