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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'/2 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. 2411.3.4 Recommended Clearances. Clearance between a door and panel or door and wall shall be no less than 1/8 inch (3.2 mm). Clearance at the bottom of the door shall be no less than 3/16 inch (5 mm) between the exposed glass edge and the curb or threshold. 2411.4 Size Limitation. 2411.4.1 Doors. Shower doors shall not exceed 38 inches (965 mm) in width or 150 lbs. in weight. Exception: These limits may be exceeded only when a licensed engineer submits a stamped calculation. 2411.4.2 Non -load Bearing Panels. 3/8 inch (10 mm) panels may not exceed 110 (2,794 mm) united inches, width + height (UI). '/2 inch (12 mm) panels shall not exceed 120 (3,048 mm) UI, as per AGA-SH1. Height limitation, 84 inches (2,134mm). Exception: When three sides of the panel are attached to the structure, the UI limitations may be removed. A transom shall be considered the same as a header or ceiling mount and shall be secured with channel or clips on 4 sides. 2411.5 Mechanical Fastening Hardware (metal clips, header, tube bracing or channels) 2411.5.1 Metal Clips. U Channels shall be fastened to the finished shower wall. The only permitted penetration through the finished shower wall shall be the mounting screws for clips, channels, and hinges. Reglet design is not recommended. 2411.5.2 Clip Location. Clips on the long edge of the glass shall be located between 4 inches (102 mm) and 8 inches 203 mm) from each end of the glass. A third clip shall be on the long edge if the glass exceeds 48" in length. Clips shall be centered on the short edge on panels up to 16 inches (406 mm) in width. For greater widths, two clips shall be used, one at each one -third point. 2411.5.3 Non -Load Bearing Side Panels. Non -load bearing side panels shall be mounted by mechanical fasteners on the bottom and the top or bottom and one vertical side. Exception: For two in -line side panels (such as a buttress design) and /or to a return panel, the vertical butt joint(s) shall be sealed with a structural silicone sealant and shall be secured at the top with a joint spanning clip(s) or header. 2411.5.4 Load - bearing side panels. Load - bearing side panels and any return panel shall be secured with mechanical fasteners on three sides. The minimum width of a load- bearing panel shall be 5 inches (127 mm). 20.08.170 CBC Chapter 31B adopted and amended —Public Swimming Pools.