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maximum 24 inch (6096 mm) intervals along the top plate of discontinuous vertical framing. 20.08.160 CBC Chapter 24 amended — Glass and Glazing. Chapter 24 is amended to add Section 2411 to read as follows: Section 2411 Shower Enclosures. 2411.1 General. Glazing and installation of framed and frameless shower units shall be in accordance with manufacturer's instructions and the AGA Industry Frameless Shower Standards (AGA-SHI) and comply with Category II of CPSC 16 CFR 1201. 2411.1.1 Structural Framing. The entire surround of a shower opening shall be no less than nominal wood stud construction or steel studs with wood furring. 2411.1.2 Jumping Retainers. A device shall be installed in the header that prevents a sliding panel from accidentally vacating the opening. 2411.1.3 Towel Bars and Handles. Horizontal bars and handle shall not be mounted to the interior of the glass surfaces. A vertical handle may be mounted to the interior of the door. 2411.1.4 Hinged Doors. Hinged doors shall open outward and provide a minimum of 22 inches (559 mm) clear opening when opened to 90°. Bi-folding doors: No portion of a bi-fold door may open into the shower area Exception: Self centering doors that swing both ways are permitted provided there is no restriction for the door to open outward to 90°. 2411.1.5 Steam/Canopied Enclosures. The roof or enclosed glass top of a shower enclosure shall be 3/8 inch (9.5mm) tempered laminated glass or 3/8 inch (9.5mm) plastic and shall not exceed 36 inches (914 mm) in the short dimension. 2411.2 Frameless Light Glass Shower Enclosures. 2411.2.1 Minimum Thickness. Frameless Light Hinging and Sliding Shower Doors shall be a minimum of 3/16 inch (5.0 mm) tempered glass. 2411.2.2 Size Limitation. Compression hinged doors shall not exceed 28 inch (711 mm) in width. Compression attached rollers to sliding doors shall not exceed 32 inches (813 mm) in width. Neither may exceed 70 inches (1,778 mm) in height. Exception: When '/4 inch (6 mm) tempered glass is used with through-glass fastening, hinged doors shall not exceed 36 inches (914 mm) in width and 96 inches (2,438 mm) in height. 2411.2.3 Panels. All /16 inch (5.0 mm) or % inch (7mm) panels shall be framed and attached to three sides. 2411.3 Frameless Heavy Glass Shower Enclosures. 2411.3.1 Hinges. Hinge weights shall not exceed the manufacturer's tested maximum load. Each hinge shall be labeled with its load rating and the label may not be removed before inspection. Three hinges are allowed only when a plumb substrate is provided. 2411.3.2 Screws. Stainless steel screws shall be used of minimum size #10 and a length sufficient to make a minimum penetration into the wood frame of 1% inch (38 mm). This penetration into the substrate shall be sealed with a non-hardening, asphalt base sealant. 2411.3.3 Minimum Thickness. Hinged shower doors and stationary panels shall be a minimum of 3/8 inch (10 mm) tempered glass.