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).