2.3.

The structural design of the footing is based on a specified compressive strength, f'c, no greater than 2,500 pounds per square inch (psi) (17.2 Mpa),

regardless of the compressive strength specified in the construction documents or used in the footing construction.

3. Nonstructural concrete slabs supported directly on the ground, including concrete patios, driveways and sidewalks

(S) Section 1705.13.2: Amend Section 1705.13.2, Exception, to read as follows:

Exception: Special inspections are not required for wood shear walls, shear panels and diaphragms, including nailing, bolting, anchoring and other fastening to other

elements of the seismic-force-resisting system, where either (1) the fastener spacing of the sheathing is more than 4 inches (102mm) on center (o.c.), or (2) the tabular values for allowable shear design values are reduced to seventy-five percent (75%).

(T) Section 1803.2: Amend the first paragraph of Section 1803.2 to read as follows:

1803.2. Investigations required. Geotechnical investigations shall be conducted in accordance with Sections 1803.3 through 1803.5. Whenever unusual soil conditions are found which justify a special site investigation to determine soil stability or questionable adequacy of the overall building site, the building official may require that the owner obtain a special geological, hydrological, soil gas profile, soil chemical analysis, soils contamination, or other report as may be deemed appropriate. The investigation shall be conducted by trained and experienced professionals licensed by the State of California to prepare such evaluations, recommendations, and reports.

(U) Section 1804.4: Amend Section 1804.4 to read as follows:

1804.4. Site Grading. The ground immediately adjacent to the foundation shall be sloped away from the building at a slope of not less than one unit vertical in 50 units horizontal (2-percent) for a minimum distance of 10 feet (3048 mm) measured perpendicular to the face of the wall. If physical obstructions or lot lines prohibit 10 feet (3048 mm) of horizontal distance, a 2-percent slope shall be provided to an approved alternative method of diverting water away from the foundation. Swales used for this purpose shall be sloped not less than 2 percent where located within 10 feet (3048 mm) of the building foundation. Impervious surfaces within 10 feet (3048 mm) of the building foundation shall be sloped not less than 2 percent away from the building.

Exception: Impervious surfaces shall be permitted to be sloped less than 2 percent where the surface is a door landing or ramp that is required to comply with

Section 1010.1.4, 1012.3 or 1012.6.1.

The procedure used to establish the final ground level adjacent to the foundation shall account for additional settlement of the backfill.

Provisions shall be made for the control and drainage of surface water around buildings. Concentrated drainage such as rainwater from gutters and downspouts, scuppers, and roof valleys shall be diverted away from building foundations by means of concrete splash blocks or other approved non-erosive devices. Unless an alternate design is approved by the building official, under floor access crawl holes shall be provided with curbs extending not less than six (6) inches above adjacent grade to prevent surface water from entering the under floor area.

Gutters and Downspouts - when buildings are located on expansive soil having an expansion index greater than 50, gutters, downspouts, piping, and/or other non-

erosive devices shall be provided to collect and conduct rainwater to a street, storm drain, or other approved watercourse or disposal area.

Lot Drainage - All lots shall be graded to drain to a street or public way that abuts the site or shall be provided with approved drainage devices. Minimum gradient of

all lots shall comply with the following:

Longitudinal Cross Slope

1. Pervious surfaces — 1 percent slope 2 percent slope

2. Asphalt surfaces — 1/2 percent slope 1 percent slope

3. Concrete surfaces — 1/4 percent slope 1/2 percent slope (2 percent = 1/4 inch per foot; 1 percent = 1/8" per foot; 1/2 percent = 1/16" per foot; and 1/4 percent = 1/32 inch per foot.)

   In rural areas where curbs or gutters have not been installed, drainage design plans shall be submitted for approval by the building official.

(V) Section 1804.8: Add Section 1804.8 to read as follows:

1804.8: Minimum Foundation Elevation. The top of any exterior foundation shall extend above the elevation of the lowest adjacent street gutter or the inlet of an approved drainage device not less than 25 inches. Alternative elevations are permitted subject to approval of the building official, provided that it can be demonstrated that required drainage to the point of discharge and away from the structure is provided at all locations on the site.

(W) Section 1905.1: Amend Section 1905.1 to read as follows:

1905.1. General. The text of ACI 318 shall be modified as indicated in Sections 1905.1.1 through 1905.1.11.

(X) Section 1905.1.7: Amend Section 1905.1.7 to read as follows:

1905.1.7. Section 14.1.4 of ACI 318 is not adopted. It is replaced with the following: