4905.4 Setbacks for Structure Defensible Space.

Except where more restrictive requirements apply, construction, projections, openings and penetrations of

exterior walls of buildings constructed on parcels within State Responsibility Areas (SRA) shall provide setbacks from the property line and/or exterior wall protection according to table 4905.4 (a) or table 4905.4 (b), in accordance with California Code of Regulations, Title 14, SRA Fire Safe Regulations.

(102)

California Fire Code Section 4905.4 (a) and Table 4905.4(b) are added to read:

Table 4905.4(a)

Exterior Walls, within State Responsibility Area, with Automatic Fire Sprinkler Protection

Exterior Wall Element Minimum Minimum Fire Separation Distance Fire-Resistance Rating

Walls (Fire-resistance rated) 1 hour-tested in accordance with ASTM E 119 or UL 263 with exposure < 10 feet from both sides

(Not fire-resistance rated) Comply with CRC Sec R337.7 or CBC ≥ 10 feet
Sec 707A

Projections (Fire-resistance rated) 1 hour on the underside < 10 feet

(Not fire-resistance rated) Comply with Section CRC Sec R337.9
or CBC Sec.709A > 10 feet

Openings in walls Not allowed N/A < 5 feet

25% maximum of wall area Apply for Alternate Methods and > 5 feet
Materials

25% maximum of wall area Comply with Section R337.8 or CBC > 10 feet
Sec 708A

Unlimited Comply with Section R337.8 or CBC > 20 feet Sec 708A

Penetrations All Comply with Section R302.4 or CBC < 10 feet 714.3

Comply with Section R327.6 or CBC > 10 feet
706A

For SI: 1 foot = 304.8 mm.

Table 4905.4 (b)

Exterior Walls, within State Responsibility Area, without Automatic Residential Fire Sprinkler Protection

Exterior Wall Element Minimum Minimum Fire Fire-Resistance Rating Separation Distance

Walls (Fire-resistance rated) 1 hour-tested in accordance with < 10 feet ASTM E 119 or UL 263 with exposure from both sides

(Not fire-resistance rated) Comply with Section R337.7 or CBC > 10 feet
Sec 707A

Projections (Fire-resistance rated) 1 hour on the underside < 10 feet

(Not fire-resistance rated) Comply with Section R337.9 or CBC > 10 feet
Sec.709A

Openings in walls Not allowed N/A < 10 feet

25% maximum of wall area Comply with Section R337.8 or CBC > 10 feet
Sec 708A

Unlimited Comply with Section R337.8 or CBC > 20 feet
Sec 708A

Penetrations All Comply with Section R302.4 or CBC < 10 feet 714.3

Comply with Section R337.6 or CBC > 10 feet
706A

For SI: 1 foot = 304.8 mm.