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The last sentence of Section R401.1 of Part III, Chapter 4 is amended to read as follows:
Wood foundations in Seismic Design Category D0, D1, D2 or E shall not be permitted.
Section R401.1 "Application" is amended by adding the following paragraph:
Refer to Title 7, Chapter 3 and Section 8-1.24 of the Thousand Oaks Municipal Code for grading regulations, administered by the Department of Public Works, for requirements governing excavation, grading and earthwork construction including fills and embankments.
Section R401.3 "Drainage" is amended by adding the following:
Lots shall be graded to drain to the street or to a disposal area approved by the Building Official and/or City Engineer.
The first sentence of Sec. R403.1 "General" is amended to read as follows:
All exterior walls and load bearing interior walls shall be supported on continuous concrete footings, or other approved structural systems which shall be of sufficient design to accommodate all loads according to Section R301 and to transmit the resulting loads to the soil within the limitations as determined from the character of the soil.
Section R403.1.1 "Minimum size" is amended to read as follows:
All foundation and/or slab designs shall be predicated upon a soil analysis. Said design shall not be less than those minimum requirements set forth in Title 8 Section 8-1.17, Table 1809.7(1) for each soil expansion range.
Post-tensioned slab design, when recommended by the soils engineer, may be used in lieu of the requirements when approved by the Building Official.
In areas where the soil is found to be in an expansive range index over twenty (20), the soil under the footings and slabs shall be pre-saturated in accordance with Table 1809.7(1). See Title 8, Section 8-1.17 for additional requirements.
Sections R403.1.2, R403.1.3, R403.1.3.1, R403.1.3.2, R403.1.3.3, R403.1.3.6, R403.1.4 and R403.1.4.1 are deleted.
Tables R403.1(1), R403.1(2) and R403.1(3) are deleted
Section R403.1.5 "Slope" is amended by adding the following:
For structures located in Seismic Design Categories D0, D1, D2 or E, stepped footings shall be reinforced with four one-half (1/2") inch diameter deformed reinforcing bars. Two (2) bars shall be placed at the top and bottom of the footings as shown in Figure R403.1.5.
Section R403.1.6 "Foundation Anchorage" is amended to replace ½-inch diameter anchor bolts with 5/8-inch diameter anchor bolts.
Section R403.1.7 "Footings on or adjacent to slopes" is amended to read as follows:
Refer to Title 8, Section 8-1.17 section 1808.7 for foundations on or adjacent to slopes.
Sections R403.1.7.1, R403.1.7.2 and R403.1.7.4 are hereby deleted.
Section R403.1.8 "Foundations on Expansive Soil" is amended by adding the following to the sentence:
"and Title 8 Section 8-1.17"
Section R404.2 "Wood foundation walls" is amended by adding the following sentence:
Wood foundation walls shall not be used for structures located in Seismic Design Category D0, D1, D2, and E.
(§ 5, Ord. 1669-NS, eff. January 10, 2020)