Chapter 31A — SYSTEMS FOR WINDOW CLEANING OR EXTERIOR BUILDING
Section 3110B — PERMANENT MARKINGS
2025 California Building Code (Title 24, Part 2) · 2025 edition · ingested 2026-07-07 · California
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3110B.1 General. ¶
3110B.1 General. No markings, designs or lettering shall be permitted on the pool shell except for slip resistant lane markings, depth marking lines and safety markings.
3110B.2 Lane markings. ¶
3110B.2 Lane markings. Slip resistant lane lines at the bottom of the pool shall not exceed 12 inches (305 mm) in width.
3110B.3 Depth marking line. ¶
3110B.3 Depth marking line. There shall be installed a straight line of slip resistant tile a minimum of 4 inches (102 mm) and not greater than 6 inches (152 mm) wide of a color contrasting with the background of the pool shell across the bottom of the pool where the water depth is 4 [1] / 2 feet (1372 mm). Exception: Pools having a maximum water depth of 5 feet (1524 mm) or less shall not be required to have a depth marking line.
3110B.4 Water depth markers. ¶
3110B.4 Water depth markers. 3110B.4.1 Location. The water depth shall be clearly marked at the following locations: 1. Maximum depth; and 2. Minimum depth; and 3. Each end; and 4. Both sides at the shallowest and deepest part of the pool; and 5. At the break in the bottom slope between the shallow and deep portions of the pool (see also Section 3109B.3); and 6. Along the perimeter of the pool at distances not to exceed 25 feet (7620 mm). Exception: A spa or wading pool shall have a minimum of two depth markers indicating the maximum depth. Note: For an illustration diagram pertaining to this…
3110B.5 No diving markers. ¶
3110B.5 No diving markers. For pool water depths 6 feet (1830 mm) or less no diving markers with the universal symbol of no diving, which is a red circle with a slash through it superimposed over the image of a diver, shall be installed on the deck directly adjacent to the depth markers required by Section 3110B.4.1. No diving markers shall comply with Section 3110B.4.4(2-3).