Index — S
California Mechanical Code (Title 24, Part 4) · 2025 edition · updated 2026-10-23 · California
CBSC: official editions, supplements and errata
Italicized text is a California amendment to the model code, as printed in the official publication.
Cite as: 2025 California Mechanical Code (Title 24, Part 4) · Effective January 1, 2026 · Official source: Building Standards Commission
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SAFE TEMPERATURES
Alternate Source of Power . . . . . . . . . . . . . . . . . . 325.0
SCOPE AND ADMINISTRATION . . . . . . . . . . . . . Chapter 1
SEDIMENT TRAPS . . . . . . . . . . . . . . . . . . 1310.9.2, 1312.9
SEEPAGE PAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 906.10
SELF-CONTAINED . . . . . . . . . . . . . . . . . . . . . 221.0, 517.1.2
SENSITIVE AREAS OR ROOMS [OSHPD] . . . . . . . . . 322.0
SHAFT
Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221.0
Fuel gas piping. . . . . . . . . . . . . . . . . . . . . . . . . 1310.3.4
Refrigeration systems . . . . . . . . . . . . . . 305.4, 1109.4.1
Stair and shaft vents . . . . . . . . . . . . . . . . . . E 503.4.6.4
SHAFT ENCLOSURE
Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221.0
SHUTOFF
Automatic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 609.0
Fuel. . . . . . . . . . . . . . . . . . . . . . . 513.4, 513.8, C 102.0,
Table 1003.2.1
SMOKE DAMPERS . . . . . . . . . . . . . . . . 206.0, 606.0 , 606.8
SMOKE DETECTORS . . . . . . . . . . . . . . 221.0, 609.0 , 609.2
SNOWMELT SYSTEMS . . . . . . . . . . . . . . 1220.4, 1220.4.1,
1217.8.2, Table 1220.4.2
SOLAR ENERGY SYSTEMS . . . . . . . . . . . . . . . . . . . . 1502.0
SOLID-FUEL
Boilers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1002.4
Burning appliances . . . . . . . . . . . . . . . . . . . . . . . 902.10 Chimney, combination
gas- and solid-fuel. . . . . . . . . . . . . . . . . . . . 802.5.8.2 Cooking operations . . . . . . . . . . . . . . . . . . . . . . . . 517.0
Furnace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 904.11
Room heaters . . . . . . . . . . . . . . . . . . . . . . . . . . . . 915.4
Venting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 801.3
SPARK ARRESTERS
Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221.0
Solid-fuel cooking operations . . . . . . . . . . . . . . . 517.1.6
SPECIFIC APPLIANCES,
INSTALLATION OF . . . . . . . . . . . . . . . . . . . . . . Chapter 9
STANDARDS
Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221.0
General . . . . . . . . . . . . . . . . . . . . . . . . . . 301.2, 302.1.2
Fire-extinguishing systems. . . . . . . . . . . . . . . . . 513.2.2
Fuel gas piping. . . . . . . . . . . . . . . . . . . . . . . . . . D 115.1
Hydronics . . . . . . . . . . . . . 1203.2, 1207.3, Table 1210.1
Oil-or liquid-fuel
burning equipment. . . . . . . . . . . . . . . . . . . . . C 103.0 Referenced. . . . . . . . . . . . . . . . . . . . . . . . . . Chapter 18
Steam and hot water boilers . . . . . . . . . . . . . . . . 1002.0
STATIONARY
Engine generators. . . . . . . . . . . . . . . . . . . . . . . . 1602.0
Fuel Cell Power Plant . . . . . . . . . . . . . . . . 221.0, 1601.0
Gas Engines . . . . . . . . . . . . . . . . . . . . . . . . . . . .1602.0
STEAM AND HOT-WATER SYSTEMS (Hospitals) . . . .319.0
SUPPORT AND HANGERS . . . . . . . . . .313.0, Table 313.3
SUSTAINABLE PRACTICES . . . . . . . . . . . . . . .Appendix E SWITCHES, ELECTRICAL SUPPLY LINE . . . . . . .903.2.7
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