Wildomar Municipal Code Ch. 15.16 Residential Code (CA)

§ 15.16.010. Adoption of the California Residential Code.¶

Except as hereinafter modified or changed, the 2025 California Residential Code (California Code of Regulations, Title 24, Part 2.5), along with appendix CI of that certain residential code, as published by the California Building Standards Commission, is hereby adopted by reference and incorporated into this Title 15 of the Wildomar Municipal Code. A copy of said California Residential Building Code shall be on file in the office of the City Clerk.

(Ord. 56 § 2, 2011; Ord. 92 § 7, 2014; Ord. 129 § 6, 2017; Ord. 175 § 7, 2019; Ord. 224 § 6, 2022; Ord. 257, 11/12/2025)

Exceptions & meaning →

§ 15.16.020. Modification of the California Residential Code.¶

The 2025 California Residential Code is hereby modified as follows:

R301.2 Climatic and geographic design criteria. Buildings shall be constructed in accordance with the provisions of this code as limited by the provisions in this section. Additional criteria shall be established by the local jurisdiction and set forth in Table R301.2

(a) TABLE R301.2 is completed, and footnote (g) is revised, as required by the Residential Building Code, for use in the City of Wildomar.

TABLE R301.2 CLIMATIC AND GEOGRAPHIC DESIGN CRITERIA CITY OF WILDOMAR

Ground Snow Load °	WIND DESIGN	WIND DESIGN	WIND DESIGN	WIND DESIGN	Seismic Design Category f	SUBJECT TO DAMAGE FROM	SUBJECT TO DAMAGE FROM	SUBJECT TO DAMAGE FROM	Ice Barrier Underlayment Required h	Flood Hazards g	Air Freezing Index i	Mean Annual Temp j
Ground Snow Load °	Speed d (mph)	Topographic Effects k	Special Wind Region l	Windborne Debris Zone m	Seismic Design Category f	Weathering a	Frost Line Depth b	Termite c	Ice Barrier Underlayment Required h	Flood Hazards g	Air Freezing Index i	Mean Annual Temp j
ZERO	110	NO	NO	NO	D 2 or E	Negligible	12"-24"	Very Heavy	NO	See revised footnote (g)	10	63.6 °F

For SI: 1 pound per square foot = 0.0479 kPa, 1 mile per hour = 0.447 m/s.

a.	Where weathering requires a higher strength concrete or grade of masonry than necessary to satisfy the structural requirements of this code, the frost line depth strength required for weathering shall govern. The weathering column shall be filled in with the weathering index, "negligible," "moderate" or "severe" for concrete as determined from Figure R301.2(1). The grade of masonry units shall be determined from ASTM C34, ASTM C55, ASTM C62, ASTM C73, ASTM C90, ASTM C129, ASTM C145, ASTM C216 or ASTM C652.
b.	Where the frost line depth requires deeper footings than indicated in Figure R403.1(1), the frost line depth strength required for weathering shall govern. The jurisdiction shall fill in the frost line depth column with the minimum depth of footing below finish grade.
c.	The jurisdiction shall fill in this part of the table to indicate the need for protection depending on whether there has been a history of local subterranean termite damage.
d.	The jurisdiction shall fill in this part of the table with the wind speed from the ultimate design wind speeds map [Figure R301.2(2)]. Wind exposure category shall be determined on a site-specific basis in accordance with Section R301.2.1.4.
e.	The jurisdiction shall fill in this section of the table to establish the design criteria using Table 10A from ACCA Manual J or established criteria determined by the jurisdiction.
f.	The jurisdiction shall fill in this part of the table with the seismic design category determined from Section R301.2.2.1.
g.	See City of Wildomar FIRM maps for Flood Hazard locations
h.	In accordance with Sections R905.1.2, R905.4.3.1, R905.5.3.1, R905.6.3.1, R905.7.3.1 and R905.8.3.1, where there has been a history of local damage from the effects of ice damming, the jurisdiction shall fill in this part of the table with "YES." Otherwise, the jurisdiction shall fill in this part of the table with "NO."
i.	The jurisdiction shall fill in this part of the table with the 100-year return period air freezing index (BF-days) from Figure R403.3(2) or from the 100-year (99 percent) value on the National Climatic Data Center data table "Air Freezing Index-USA Method (Base 32° F)."
j.	The jurisdiction shall fill in this part of the table with the mean annual temperature from the National Climatic Data Center data table "Air Freezing Index-USA Method (Base 32°F)."
k.	In accordance with Section R301.2.1.5, where there is local historical data documenting structural damage to buildings due to topographic wind speed-up effects, the jurisdiction shall fill in this part of the table with "YES." Otherwise, the jurisdiction shall indicate "NO" in this part of the table.
l.	In accordance with Figure R301.2(2), where there is local historical data documenting unusual wind conditions, the jurisdiction shall fill in this part of the table with "YES" and identify any specific requirements. Otherwise, the jurisdiction shall indicate "NO" in this part of the table.
m.	In accordance with Section R301.2.1.2 the jurisdiction shall indicate the wind-borne debris wind zone(s). Otherwise, the jurisdiction shall indicate "NO" in this part of the table.
n.	The jurisdiction shall fill in these sections of the table to establish the design criteria using Table 1a or 1b from ACCA Manual J or established criteria determined by the jurisdiction.
o.	The jurisdiction shall fill in this section of the allowable stress design table using the Ground Snow Loads in Figure R301.2(3).

(Ord. 92 § 7, 2014; Ord. 129 § 6, 2017; Ord. 175 § 7, 2019; Ord. 224 § 6, 2022; Ord. 257, 11/12/2025)

Exceptions & meaning →