CRC · California Residential Code

What are the requirements for sheathing-only bracing units (R602.12)?

Sheathing‑only bracing units are full‑height exterior wall panels used to meet simplified CRC bracing. Use either 3/8" wood panels or 1/2" structural fiberboard; minimum bracing unit length is **3 ft** when all framed wall areas are sheathed or **4 ft** when intervening areas are not sheathed. Count units by dividing wall segment length by the applicable minimum, then confirm the minimum number per building side in **Table R602.12.4** and place units by the distribution rules. **§ R602.12.2–§ R602.12.4**

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Last reviewed: July 6, 2026

What the code requires — 2-4 sentences

Sheathing-only bracing units are full‑height exterior wall segments sheathed with approved panel materials and used to meet the simplified wall‑bracing alternative in § R602.12. The permitted sheathing materials and minimum thicknesses are specified in § R602.12.2, the definition and minimum lengths of a bracing unit are in § R602.12.3, and the minimum number of bracing units required on each side of the circumscribed rectangle is set by § R602.12.4.

A bracing unit is a full‑height, uninterrupted exterior sheathed wall segment of a minimum length (3 ft or 4 ft depending on whether all framed wall areas are sheathed); interior walls do not count toward required bracing. § R602.12.3

Requirements in detail

Approved sheathing materials (what you may use)

  • Wood structural panels with minimum nominal thickness 3/8 inch (9.5 mm), installed and fastened per the sheathing fastener requirements referenced in § R602.12.2. § R602.12.2(1)
  • Structural fiberboard sheathing with minimum thickness 1/2 inch (12.7 mm), fastened per the referenced fastening schedule. § R602.12.2(2)
  • Mixing of the two sheathing materials on the same story is prohibited. § R602.12.2

What counts as a bracing unit

  • A bracing unit is a full‑height sheathed segment of exterior wall with no openings or vertical/horizontal offsets and with a minimum length as follows:
    • 3 feet (914 mm) when all framed portions of all exterior walls are sheathed in accordance with § R602.12.2 (this includes areas above/below openings and gable ends). § R602.12.3(1)
    • 4 feet (1219 mm) when exterior walls are braced with panels but areas between bracing units are covered with other materials. § R602.12.3(2)

Multiple / partial panels and counting

  • Wall segments longer than the minimum bracing length are treated as multiple bracing units; the number is obtained by dividing the wall segment length by the minimum bracing unit length (see § R602.12.3.1). Full‑height sheathed segments shorter than the minimum do not count except as allowed by other provisions. § R602.12.3.1

Minimum number required on each side of the building

  • Each side of the circumscribed rectangle around the building must have at least the minimum number of bracing units shown in Table R602.12.4, and bracing units are then placed according to the distribution rules in § R602.12.5. Consult § R602.12.4 and Table R602.12.4 for the required counts (values vary by ultimate design wind speed, number of stories and wall dimensions). § R602.12.4

Decision‑relevant dimensions / values

Item Value Code reference
Wood structural panel minimum thickness 3/8 in (9.5 mm) § R602.12.2(1)
Structural fiberboard minimum thickness 1/2 in (12.7 mm) § R602.12.2(2)
Min bracing unit length — fully sheathed walls 3 ft (914 mm) § R602.12.3(1)
Min bracing unit length — intermittent sheathing / other materials between units 4 ft (1219 mm) § R602.12.3(2)
How to count multiple units Divide wall segment length by the minimum bracing length (per §) § R602.12.3.1
Minimum number of units per side See Table R602.12.4 (varies by wind speed, story, and side lengths) § R602.12.4 and Table R602.12.4

Fastening / nailing

  • The sheathing materials must be fastened in accordance with the referenced nailing/fastener tables (e.g., Table R602.3 variants and the schedules for the specific sheathing). See the fastener tables referenced by § R602.12.2 for the required spacing and nail types. § R602.12.2 (references Table R602.3)

Exceptions & special cases

  • Mixing materials is not allowed on the same story: you cannot combine wood panels and fiberboard for counting bracing units on the same story. § R602.12.2; § R602.12.3
  • Interior walls do not count toward the amount of required bracing — only exterior, full‑height sheathed segments count. § R602.12.3
  • Where the exterior is completely sheathed (including above/below openings and gable ends) the shorter 3‑ft unit length applies; if any intervening areas are covered with other materials, the longer 4‑ft unit applies. § R602.12.3(1)–(2)
  • After you determine how many bracing units are available on each wall, you must still meet the minimum number per side from Table R602.12.4 and place them per the distribution rules in § R602.12.5. § R602.12.4

Common mistakes

  • Counting interior partitions or non‑full‑height sheathed segments as bracing — interior walls do not contribute. § R602.12.3
  • Mixing wood structural panels and structural fiberboard on the same story and expecting both to count — mixing is prohibited. § R602.12.2; § R602.12.3
  • Forgetting to meet the minimum number per side in Table R602.12.4 (some designers stop after counting available bracing units without checking the table). § R602.12.4
  • Installing bracing units with insufficient fasteners or the wrong nailing schedule — always follow the referenced fastening tables (e.g., Table R602.3). § R602.12.2
  • Placing a bracing unit too far from a corner or leaving gaps greater than allowed — distribution rules in § R602.12.5 set limits on distance from corners and spacing between units. § R602.12.5

Worked example — concrete scenario with numbers

Scenario: One story house where every framed portion of every exterior wall is sheathed with wood structural panels (so the 3‑ft rule applies). Consider a single exterior wall segment that is 36 ft long and is fully sheathed.

Step 1 — Minimum bracing unit length: because all framed portions are sheathed, the minimum bracing unit is 3 ft. § R602.12.3(1)

Step 2 — Number of bracing units in that wall segment: divide the wall length by the minimum unit length: 36 ft ÷ 3 ft = 12 bracing units (treated as multiple bracing units per § R602.12.3.1). § R602.12.3.1

Step 3 — Check minimums per side: After you tally units on each wall, compare with the minimum number required on that side from Table R602.12.4 (values depend on wind speed, story count and the circumscribed rectangle side lengths). If Table R602.12.4 requires, for example, 4 units on that side under the site conditions, your 12 available units exceed the minimum; if the Table requires more than 12, you must add bracing (or change sheathing) to meet the table. § R602.12.4

Variation: If the same 36‑ft wall had areas between bracing units covered with other materials, the minimum unit length becomes 4 ft and the count would be 36 ÷ 4 = 9 bracing units. § R602.12.3(2)

Finally, place the units to meet distribution rules (a bracing unit must start no more than 12 ft from a corner; adjacent bracing unit edges no more than 20 ft apart; see § R602.12.5).

Related provisions

  • § R602.12.1 — Circumscribed rectangle (how to lay out the plan and limit on rectangle sides).
  • § R602.12.5 — Distribution of bracing units (begin no more than 12 ft from a corner; adjacent edges ≤ 20 ft).
  • § R602.12.6 — Narrow panels and equivalencies with other bracing methods (when short panels or special braced panels may be used).
  • § R602.12.7 — Lateral support at eaves (top plate to roof sheathing distance limit 9.25 in unless lateral support provided).
  • § R602.3 / Table R602.3(1) and (3) — Sheathing fastening schedules referenced by § R602.12.2 (nail type and spacing).
  • Table R602.12.4 — Minimum number of bracing units per side (use for final verification). § R602.12.4

Code references

Grounded in the retrieved California Residential Code — click a citation to read the verbatim passage:

  • CRC § 12.1 High relevance — show source text
    1. The structure shall be located where the ultimate design wind speed is less than or equal to 130 mph (58 m/s), and the exposure category is B or C.
    2. The structure shall be located in Seismic Design Category A, B or C for detached one- and two-family dwellings or Seismic Design Category A or B for townhouses.
    3. Cripple walls shall not be permitted in three-story buildings.

    R602.12.1 Circumscribed rectangle. The bracing required for each building shall be determined by circumscribing a rectangle around the entire building on each floor as shown in Figure R602.12.1. The rectangle shall surround all enclosed offsets and projections such as sunrooms and attached garages. Open structures, such as carports and decks, shall be permitted to be excluded. The rectangle shall not have a side greater than 60 feet (18 288 mm), and the ratio between the long side and short side shall be not greater than 3:1.

    FIGURE R602.12.1—RECTANGLE CIRCUMSCRIBING AN ENCLOSED BUILDING

    LONG SIDE

    TYPICAL SEGMENTS OF TYPICAL SEGMENTS OF WALL BETWEEN CORNERS WALL BETWEEN CORNERS

    Col1 LONG SIDE
    TYPICAL SEGMENTS OF
    WALL BETWEEN CORNERS
    TYPICAL
    WALL
    CORNER
    LONG SIDE
    CIRCUMSCRIBING RECTANGLE
    SHORT SIDE SHORT SIDE
    Col1 Col2
    TYPICAL SEGMENTS OF
    WALL BETWEEN CORNERS    		 TYPICAL SEGMENTS OF
    WALL BETWEEN CORNERS
    CIRCUMSCRIBING RECTANGLE

    FIRST FLOOR PLAN SECOND FLOOR PLAN

    R602.12.2 Sheathing materials. The following sheathing materials installed on the exterior side of exterior walls shall be used to construct a bracing unit as defined in Section R602.12.3. Mixing materials is prohibited.

    1. Wood structural panels with a minimum thickness of [3] / 8 inch (9.5 mm) fastened in accordance with Table R602.3(3).
    2. Structural fiberboard sheathing with a minimum thickness of [1] / 2 inch (12.7 mm) fastened in accordance with Table R602.3(1).

    R602.12.3 Bracing unit. A bracing unit shall be a full-height sheathed segment of the exterior wall without openings or vertical or horizontal offsets and a minimum length as specified herein. Interior walls shall not contribute toward the amount of required bracing. Mixing of Items 1 and 2 is prohibited on the same story.

    1. Where all framed portions of all exterior walls are sheathed in accordance with Section R602.12.2, including wall areas between bracing units, above and below openings and on gable end walls, the minimum length of a bracing unit shall be 3 feet (914 mm).

    2. Where the exterior walls are braced with sheathing panels in accordance with Section R602.12.2 and areas between bracing units are covered with other materials, the minimum length of a bracing unit shall be 4 feet (1219 mm).

  • CRC § 12.2 High relevance — show source text
    Col1 Col2
    TYPICAL SEGMENTS OF
    WALL BETWEEN CORNERS    		 TYPICAL SEGMENTS OF
    WALL BETWEEN CORNERS
    CIRCUMSCRIBING RECTANGLE

    FIRST FLOOR PLAN SECOND FLOOR PLAN

    R602.12.2 Sheathing materials. The following sheathing materials installed on the exterior side of exterior walls shall be used to construct a bracing unit as defined in Section R602.12.3. Mixing materials is prohibited.

    1. Wood structural panels with a minimum thickness of [3] / 8 inch (9.5 mm) fastened in accordance with Table R602.3(3).
    2. Structural fiberboard sheathing with a minimum thickness of [1] / 2 inch (12.7 mm) fastened in accordance with Table R602.3(1).

    R602.12.3 Bracing unit. A bracing unit shall be a full-height sheathed segment of the exterior wall without openings or vertical or horizontal offsets and a minimum length as specified herein. Interior walls shall not contribute toward the amount of required bracing. Mixing of Items 1 and 2 is prohibited on the same story.

    1. Where all framed portions of all exterior walls are sheathed in accordance with Section R602.12.2, including wall areas between bracing units, above and below openings and on gable end walls, the minimum length of a bracing unit shall be 3 feet (914 mm).

    2. Where the exterior walls are braced with sheathing panels in accordance with Section R602.12.2 and areas between bracing units are covered with other materials, the minimum length of a bracing unit shall be 4 feet (1219 mm).

    R602.12.3.1 Multiple bracing units. Segments of wall compliant with Section R602.12.3 and longer than the minimum bracing unit length shall be considered as multiple bracing units. The number of bracing units shall be determined by dividing the wall segment length by the minimum bracing unit length. Full-height sheathed segments of wall narrower than the minimum bracing unit length shall not contribute toward a bracing unit except as specified in Section R602.12.6.

    R602.12.4 Number of bracing units. Each side of the circumscribed rectangle, as shown in Figure R602.12.1, shall have, at a minimum, the number of bracing units in accordance with Table R602.12.4 placed on the parallel exterior walls facing the side of the rectangle. Bracing units shall then be placed using the distribution requirements specified in Section R602.12.5.

    2025 CALIFORNIA RESIDENTIAL CODE 6-51

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    WALL CONSTRUCTION

    |TABLE R602.12.

  • CRC § 12.2 High relevance — show source text
    1. Where the exterior walls are braced with sheathing panels in accordance with Section R602.12.2 and areas between bracing units are covered with other materials, the minimum length of a bracing unit shall be 4 feet (1219 mm).

    R602.12.3.1 Multiple bracing units. Segments of wall compliant with Section R602.12.3 and longer than the minimum bracing unit length shall be considered as multiple bracing units. The number of bracing units shall be determined by dividing the wall segment length by the minimum bracing unit length. Full-height sheathed segments of wall narrower than the minimum bracing unit length shall not contribute toward a bracing unit except as specified in Section R602.12.6.

    R602.12.4 Number of bracing units. Each side of the circumscribed rectangle, as shown in Figure R602.12.1, shall have, at a minimum, the number of bracing units in accordance with Table R602.12.4 placed on the parallel exterior walls facing the side of the rectangle. Bracing units shall then be placed using the distribution requirements specified in Section R602.12.5.

    2025 CALIFORNIA RESIDENTIAL CODE 6-51

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    WALL CONSTRUCTION

    TABLE R602.12.4—MINIMUM NUMBER OF BRACING UNITS ON EACH SIDE OF THE CIRCUMSCRIBED RECTANGLE Col2 Col3 Col4 Col5 Col6 Col7 Col8 Col9 Col10 Col11 Col12 Col13 Col14 Col15
    ** ULTIMATE**
    DESIGN
    WIND SPEED
    (mph)    		 ** STORY LEVEL** ** EAVE-TO-
    RIDGE HEIGHT
    (feet)**    		 ** MINIMUM NUMBER OF**
    BRACING UNITS ON EACH LONG SIDEa, b, d    		 ** MINIMUM NUMBER OF**
    BRACING UNITS ON EACH LONG SIDEa, b, d    		 ** MINIMUM NUMBER OF**
    BRACING UNITS ON EACH LONG SIDEa, b, d    		 ** MINIMUM NUMBER OF**
    BRACING UNITS ON EACH LONG SIDEa, b, d    		 ** MINIMUM NUMBER OF**
    BRACING UNITS ON EACH LONG SIDEa, b, d    		 ** MINIMUM NUMBER OF**
    BRACING UNITS ON EACH LONG SIDEa, b, d    		 ** MINIMUM NUMBER OF**
    BRACING UNITS ON EACH SHORT SIDEa, b, d    		 ** MINIMUM NUMBER OF**
    BRACING UNITS ON EACH SHORT SIDEa, b, d    		 ** MINIMUM NUMBER OF**
    BRACING UNITS ON EACH SHORT SIDEa, b, d    		 ** MINIMUM NUMBER OF**
    BRACING UNITS ON EACH SHORT SIDEa, b, d    		 ** MINIMUM NUMBER OF**
    BRACING UNITS ON EACH SHORT SIDEa, b, d    		 ** MINIMUM NUMBER OF**
    BRACING UNITS ON EACH SHORT SIDEa, b, d
    ** ULTIMATE**
    DESIGN
    WIND SPEED
    (mph)    		 ** STORY LEVEL** **
  • CRC § 12.6.1 High relevance — show source text

    R602.12.6.1 Method CS-G. Braced wall panels constructed as Method CS-G in accordance with Tables R602.10.4 and R602.10.5 shall be permitted for one-story garages where all framed portions of all exterior walls are sheathed with wood structural panels. Each CS-G panel shall be equivalent to 0.5 of a bracing unit. Segments of wall that include a Method CS-G panel shall meet the requirements of Section R602.10.4.2.

    R602.12.6.2 Method CS-PF. Braced wall panels constructed as Method CS-PF in accordance with Section R602.10.6.4 shall be permitted where all framed portions of all exterior walls are sheathed with wood structural panels. Each CS-PF panel shall equal 0.75 bracing units. Segments of wall that include a Method CS-PF panel shall meet the requirements of Section R602.10.4.2.

    R602.12.6.3 Methods ABW, PFH and PFG. Braced wall panels constructed as Method ABW, PFH and PFG shall be permitted where bracing units are constructed using wood structural panels applied either continuously or intermittently. Each ABW and PFH panel shall equal one bracing unit and each PFG panel shall be equal to 0.75 bracing unit.

    R602.12.7 Lateral support. For bracing units located along the eaves, the vertical distance from the outside edge of the top wall plate to the roof sheathing above shall not exceed 9.25 inches (235 mm) at the location of a bracing unit unless lateral support is provided in accordance with Section R602.10.8.2.

    R602.12.8 Stem walls. Masonry stem walls with a height and length of 48 inches (1219 mm) or less supporting a bracing unit or a Method CS-G, CS-PF or PFG braced wall panel shall be constructed in accordance with Figure R602.10.9. Concrete stem walls with a length of 48 inches (1219 mm) or less, greater than 12 inches (305 mm) tall and less than 6 inches (152 mm) thick shall be reinforced sized and located in accordance with Figure R602.10.9.

    SECTION R603—COLD-FORMED STEEL WALL FRAMING

    R603.1 General. Elements shall be straight and free of any defects that would significantly affect structural performance. Coldformed steel wall framing members shall be in accordance with the requirements of this section.

    R603.1.1 Applicability limits. The provisions of this section shall control the construction of exterior cold-formed steel wall framing and interior load-bearing cold-formed steel wall framing for buildings not more than 60 feet (18 288 mm) long perpendicular to the joist or truss span, not more than 40 feet (12 192 mm) wide parallel to the joist or truss span, and less than or equal to three stories above grade plane. Exterior walls installed in accordance with the provisions of this section shall be considered as loadbearing walls. Cold-formed steel walls constructed in accordance with the provisions of this section shall be limited to sites where the ultimate design wind speed is less than 140 miles per hour (63 m/s), Exposure Category B or C, and the ground snow load is less than or equal to 70 pounds per square foot (3.35 kPa).

  • CRC § 0.42 High relevance — show source text

    Nails or staples shall be spaced at not more than 12
    inches on center at intermediate supports for floors.
    d. Fasteners shall be placed in a grid pattern throughout the body of the panel.
    e. For 5-ply panels, intermediate nails shall be spaced not more than 12 inches on center each way.
    f. Hardboard underlayment shall conform to CPA/ANSI A135.4.
    g. Alternate fastening is only permitted for roof sheathing where the ultimate design wind speed is less than or equal to 110 mph, and where fasteners are installed 3 inches on
    center at all supports, and where fastening is to wood framing of a species with specific gravity greater than or equal to 0.42 in accordance with AWC NDS.
    h. Fiber-cement underlayment shall conform to ASTM C1288 or ISO 8336, Category C.|For SI: 1 inch = 25.4 mm.
    a. Nail is a general description and shall be permitted to be T-head, modified round head or round head.
    b. Staples shall have a minimum crown width of7/16-inch except as noted.
    c. Nails or staples shall be spaced at not more than 6 inches on center at all supports where spans are 48 inches or greater. Nails or staples shall be spaced at not more than 12
    inches on center at intermediate supports for floors.
    d. Fasteners shall be placed in a grid pattern throughout the body of the panel.
    e. For 5-ply panels, intermediate nails shall be spaced not more than 12 inches on center each way.
    f. Hardboard underlayment shall conform to CPA/ANSI A135.4.
    g. Alternate fastening is only permitted for roof sheathing where the ultimate design wind speed is less than or equal to 110 mph, and where fasteners are installed 3 inches on
    center at all supports, and where fastening is to wood framing of a species with specific gravity greater than or equal to 0.42 in accordance with AWC NDS.
    h. Fiber-cement underlayment shall conform to ASTM C1288 or ISO 8336, Category C.|For SI: 1 inch = 25.4 mm.
    a. Nail is a general description and shall be permitted to be T-head, modified round head or round head.
    b. Staples shall have a minimum crown width of7/16-inch except as noted.
    c. Nails or staples shall be spaced at not more than 6 inches on center at all supports where spans are 48 inches or greater. Nails or staples shall be spaced at not more than 12
    inches on center at intermediate supports for floors.
    d. Fasteners shall be placed in a grid pattern throughout the body of the panel.
    e. For 5-ply panels, intermediate nails shall be spaced not more than 12 inches on center each way.
    f. Hardboard underlayment shall conform to CPA/ANSI A135.4.
    g. Alternate fastening is only permitted for roof sheathing where the ultimate design wind speed is less than or equal to 110 mph, and where fasteners are installed 3 inches on
    center at all supports, and where fastening is to wood framing of a species with specific gravity greater than or equal to 0.42 in accordance with AWC NDS.
    h. Fiber-cement underlayment shall conform to ASTM C1288 or ISO 8336, Category C.|

    |TABLE R602.

  • CRC § 12.5 High relevance — show source text

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    WALL CONSTRUCTION

    R602.12.5 Distribution of bracing units. The placement of bracing units on exterior walls shall meet all of the following requirements as shown in Figure R602.12.5.

    1. A bracing unit shall begin not more than 12 feet (3658 mm) from any wall corner.
    2. The distance between adjacent edges of bracing units shall be not greater than 20 feet (6096 mm).
    3. Segments of wall greater than 8 feet (2438 mm) in length shall have not less than one bracing unit.

    FIGURE R602.12.5—BRACING UNIT DISTRIBUTION

    20 FT. 12 FT. 20 FT.

    WALL WALL WALL CORNER CORNER CORNER

    4 FT. BRACING UNIT

    3 FT. BRACING UNIT

    Col1 20 FT. 12 FT. Col4
    MAX MAX MAX
    Col1 20 FT. Col3 Col4
    MAX MAX MAX

    MULTIPLE BRACING UNITS MULTIPLE BRACING UNITS EQUAL LENGTH DIVIDED BY 4 EQUAL LENGTH DIVIDED BY 3

    BRACING WITH AREAS BETWEEN BRACING UNITS WITH ALL FRAMED COVERED WITH OTHER MATERIALS PORTIONS OF WALL SHEATHED

    For SI: 1 foot = 304.8 mm.

    R602.12.6 Narrow panels. The bracing methods referenced in Section R602.10 and specified in Sections R602.12.6.1 through R602.12.6.3 shall be permitted where using simplified wall bracing.

    R602.12.6.1 Method CS-G. Braced wall panels constructed as Method CS-G in accordance with Tables R602.10.4 and R602.10.5 shall be permitted for one-story garages where all framed portions of all exterior walls are sheathed with wood structural panels. Each CS-G panel shall be equivalent to 0.5 of a bracing unit. Segments of wall that include a Method CS-G panel shall meet the requirements of Section R602.10.4.2.

    R602.12.6.2 Method CS-PF. Braced wall panels constructed as Method CS-PF in accordance with Section R602.10.6.4 shall be permitted where all framed portions of all exterior walls are sheathed with wood structural panels. Each CS-PF panel shall equal 0.75 bracing units. Segments of wall that include a Method CS-PF panel shall meet the requirements of Section R602.10.4.2.

    R602.12.6.3 Methods ABW, PFH and PFG. Braced wall panels constructed as Method ABW, PFH and PFG shall be permitted where bracing units are constructed using wood structural panels applied either continuously or intermittently. Each ABW and PFH panel shall equal one bracing unit and each PFG panel shall be equal to 0.75 bracing unit.

    R602.12.7 Lateral support. For bracing units located along the eaves, the vertical distance from the outside edge of the top wall plate to the roof sheathing above shall not exceed 9.25 inches (235 mm) at the location of a bracing unit unless lateral support is provided in accordance with Section R602.10.8.2.

  • California Residential Code High relevance — show source text

    |100 psf|1 hr
    23 min|||7|1, 2|11/3| |F/C-4-RC-9|4″|4″ deep (4370 psi);1/4″ reinforcement bars
    at 6″ pitch with3/4″ cover;1/4″ main rein-
    forcement bars at 4″ pitch perpendicular
    with1/2″ cover; 13′1″ span restrained.|150 psf|2 hrs|||7|1, 3|2| |F/C-4-RC-10|4″|4″ thick (5140 psi) deck;1/4″ reinforce-
    ment bars at 71/2″ pitch with7/8″ cover;3/8″
    main reinforcement bars at 33/4″ pitch
    perpendicular with1/2″ cover; 13′1″ span
    restrained.|140 psf|1 hr
    16 min|||7|1, 5|11/4| |F/C-4-RC-11|4″|4″ thick (4000 psi) concrete deck;
    3″ × 11/2″ × 4 lbs R.S.J.; 2′6″ C.R.S.; flush
    with top surface; 4″ × 6″ x 13 SWG mesh
    reinforcement 1″ from bottom of slab; 6′6″
    span restrained.|150 psf|2 hrs|||7|1, 3|2| |F/C-4-RC-12|4″|4″ deep (2380 psi) concrete deck;
    3″ × 11/2″ × 4 lbs R.S.J.; 2′6″ C.R.S.; flush
    with top surface; 4″ × 6″ x 13 SWG mesh
    reinforcement 1″ from bottom surface;
    6′6″ span restrained.|150 psf|1 hr
    3 min|||7|1, 2|1| |F/C-4-RC-13|41/2″|41/2″ thick (5200 psi) deck;1/4″ reinforce-
    ment bars at 71/4″ pitch with7/8″ cover;3/8″
    main reinforcement bars at 33/4″ pitch
    perpendicular with1/2″ cover; 13′1″ span
    restrained.|140 psf|2 hrs|||7|1, 3|2| |F/C-4-RC-14|41/2″|41/2″ deep (2525 psi) concrete deck;1/4″
    reinforcement bars at 71/2″ pitch with7/8″
    cover;3/8″ main reinforcement bars at
    33/8″ pitch perpendicular with1/2″ cover;
    13′1″ span restrained.|150 psf|42 min|||7|1, 5|2/3| |F/C-4-RC-15|41/2″|41/2″ deep (4830 psi) concrete deck;
    11/2″ × No.

  • California Residential Code High relevance — show source text

    ; 2′ C.R.S. with 1″ cover on
    both top and bottom flanges; 13′1″ span
    restrained.|60 psf|2 hrs|||7|1, 3|2| |F/C-6-RC-34|61/4″|61/4″ thick; 43/4″ (5120 psi) concrete core;
    1″ T&G board flooring;1/2″ plaster under-
    coat; 4″ × 3″ × 10 lbs R.S.J.; 3′ C.R.S. flush
    with top surface concrete; 12′ span simply
    supported; 2″ × 1′3″ clinker concrete
    insert.|100 psf|4 hrs|||7|1, 7|4| |F/C-6-RC-35|61/4″|43/4″ (3600 psi) concrete core; 1″ T&G
    board flooring;1/2″ plaster undercoat; 4″ ×
    3″ × 10 lbs R.S.J.; 3′ C.R.S. flush with top
    surface concrete; 12′ span simply
    supported; 2″ × 1′3″ clinker concrete
    insert.|100 psf|2 hrs
    30 min|||7|1, 5|21/2| |F/C-6-RC-36|61/4″|43/4″ (2800 psi) concrete core; 1″ T&G
    board flooring;1/2″ plaster undercoat; 4″ ×
    3″ × 10 lbs R.S.J.; 3′ C.R.S. flush with top
    surface concrete; 12″ span simply
    supported; 2″ × 1′3″ clinker concrete
    insert.|80 psf|4 hrs|||7|1, 7|4| |F/C-7-RC-37|7″|(3640 psi) concrete deck;1/4″ reinforce-
    ment bars at 6″ pitch with 11/2″ cover;1/4″
    reinforcement bars at 5″ pitch perpendic-
    ular with 11/2″ cover; 13′1″ span
    restrained.|169 psf|6 hrs|||7|1, 14|6| |F/C-7-RC-38|7″|(4060 psi) concrete deck; 4″ × 3″ × 10 lbs
    R.S.J.; 2′6″ C.R.S. with 11/2″ cover on both
    top and bottom flanges; 4″ × 6″ × 13 SWG
    mesh reinforcement 11/2″ from bottom of
    slab; 13′1″ span restrained.|175 psf|6 hrs|||7|1, 14|6| |F/C-7-RC-39|71/4″|53/4″ (4010 psi) concrete core; 1″ T&G
    board flooring;1/2″ plaster undercoat;
    4″ × 3″ × 10 lbs R.S.J.; 2′6″ C.R.S.

  • CRC § 10.3 High relevance — show source text

    1. Mixing of continuous sheathing methods CS-WSP, CS-G and CS-PF along a braced wall line shall be permitted. Intermittent methods ABW, PFH and PFG shall be permitted to be used along a braced wall line with continuous sheathed methods, provided that the length of required bracing for that braced wall line is determined in accordance with Table R602.10.3(1) or R602.10.3(3) using the highest value of the bracing methods used.

    2. In Seismic Design Categories A and B, and for detached one- and two-family dwellings in Seismic Design Category C, mixing of intermittent bracing methods along the interior portion of a braced wall line with continuous sheathing methods CS-WSP, CS-G and CS-PF along the exterior portion of the same braced wall line shall be permitted. The length of required bracing shall be the highest value of all intermittent bracing methods used in accordance with Table R602.10.3(1) or R602.10.3(3) as adjusted by Tables R602.10.3(2) and R602.10.3(4), respectively. The requirements of Section R602.10.7 shall apply to each end of the continuously sheathed portion of the braced wall line. R602.10.4.2 Continuous sheathing methods. Continuous sheathing methods require structural panel sheathing to be used on all sheathable surfaces on one side of a braced wall line including areas above and below openings and gable end walls and shall meet the requirements of Section R602.10.7. R602.10.4.3 Braced wall panel interior finish material. Braced wall panels shall have gypsum wall board installed on the side of the wall opposite the bracing material. Gypsum wall board shall be not less than [1] / 2 inch (12.7 mm) in thickness and be fastened with nails or screws in accordance with Table R602.3(1) for exterior sheathing or Table R702.3.5 for interior gypsum wall board. Spacing of fasteners at panel edges for gypsum wall board opposite Method LIB bracing shall not exceed 8 inches (203 mm). Interior finish material shall not be glued in Seismic Design Categories D 0, D 1 and D 2 . Exceptions:

    3. Interior finish material is not required opposite wall panels that are braced in accordance with Methods GB, BVWSP, ABW, PFH, PFG and CS-PF, unless otherwise required by Section R302.6.

    4. An approved interior finish material with an in-plane shear resistance equivalent to gypsum board shall be permitted to be substituted, unless otherwise required by Section R302.6.

    5. Except for Method LIB, gypsum wall board is permitted to be omitted provided that the required length of bracing in Tables R602.10.3(1) and R602.10.3(3) is multiplied by the appropriate adjustment factor in Tables R602.10.3(2) and R602.10.3(4), respectively, unless otherwise required by Section R302.6. R602.10.4.4 Panel joints. Vertical joints of panel sheathing shall occur over and be fastened to common studs. Horizontal joints of panel sheathing in braced wall panels shall occur over and be fastened to common blocking of a thickness of 1 [1] / 2 inches (38 mm) or greater.

  • California Residential Code High relevance — show source text

    ; 2′6″ C.R.S. with 1″ cover on
    both top and bottom flanges; 12′ span
    simply supported.|115 psf|29 min|||7|1, 5,
    13|1/4| |F/C-6-RC-31|6″|6″ deep (3450 psi) concrete deck; 4″ ×
    13/4″ × 5 lbs R.S.J.; 2′6″ C.R.S. with 1″ cover
    on both top and bottom flanges; 12′ span
    simply supported.|25 psf|3 hrs
    35 min|||7|1, 2|31/2| |F/C-6-RC-32|6″|6″ deep (4460 psi) concrete deck; 4″ ×
    13/4″ × 5 lbs R.S.J.; 2′ C.R.S. with 1″ cover
    on both top and bottom flanges; 12′ span
    simply supported.|60 psf|4 hrs
    30 min|||7|1, 10|41/2| |F/C-6-RC-33|6″|6″ deep (4360 psi) concrete deck; 4″ × 13/4″
    × 5 lbs R.S.J.; 2′ C.R.S. with 1″ cover on
    both top and bottom flanges; 13′1″ span
    restrained.|60 psf|2 hrs|||7|1, 3|2| |F/C-6-RC-34|61/4″|61/4″ thick; 43/4″ (5120 psi) concrete core;
    1″ T&G board flooring;1/2″ plaster under-
    coat; 4″ × 3″ × 10 lbs R.S.J.; 3′ C.R.S. flush
    with top surface concrete; 12′ span simply
    supported; 2″ × 1′3″ clinker concrete
    insert.|100 psf|4 hrs|||7|1, 7|4| |F/C-6-RC-35|61/4″|43/4″ (3600 psi) concrete core; 1″ T&G
    board flooring;1/2″ plaster undercoat; 4″ ×
    3″ × 10 lbs R.S.J.; 3′ C.R.S. flush with top
    surface concrete; 12′ span simply
    supported; 2″ × 1′3″ clinker concrete
    insert.|100 psf|2 hrs
    30 min|||7|1, 5|21/2| |F/C-6-RC-36|61/4″|43/4″ (2800 psi) concrete core; 1″ T&G
    board flooring;1/2″ plaster undercoat; 4″ ×
    3″ × 10 lbs R.S.J.; 3′ C.R.S.

  • CRC § 12.7 High relevance — show source text

    ** Braced wall panels shall have gypsum wall board installed on the side of the wall opposite the bracing material. Gypsum wall board shall be not less than [1] / 2 inch (12.7 mm) in thickness and be fastened with nails or screws in accordance with Table R602.3(1) for exterior sheathing or Table R702.3.5 for interior gypsum wall board. Spacing of fasteners at panel edges for gypsum wall board opposite Method LIB bracing shall not exceed 8 inches (203 mm). Interior finish material shall not be glued in Seismic Design Categories D 0, D 1 and D 2 . Exceptions:

    1. Interior finish material is not required opposite wall panels that are braced in accordance with Methods GB, BVWSP, ABW, PFH, PFG and CS-PF, unless otherwise required by Section R302.6.
    2. An approved interior finish material with an in-plane shear resistance equivalent to gypsum board shall be permitted to be substituted, unless otherwise required by Section R302.6.
    3. Except for Method LIB, gypsum wall board is permitted to be omitted provided that the required length of bracing in Tables R602.10.3(1) and R602.10.3(3) is multiplied by the appropriate adjustment factor in Tables R602.10.3(2) and R602.10.3(4), respectively, unless otherwise required by Section R302.6. R602.10.4.4 Panel joints. Vertical joints of panel sheathing shall occur over and be fastened to common studs. Horizontal joints of panel sheathing in braced wall panels shall occur over and be fastened to common blocking of a thickness of 1 [1] / 2 inches (38 mm) or greater.

    Exceptions:

    1. For methods WSP and CS-WSP, blocking of horizontal joints is permitted to be omitted when adjustment factor No. 8 of Table R602.10.3(2) or No. 10 of Table R602.10.3(4) is applied.

    6-36 2025 CALIFORNIA RESIDENTIAL CODE

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    WALL CONSTRUCTION

    1. Vertical joints of panel sheathing shall be permitted to occur over double studs, where adjoining panel edges are attached to separate studs with the required panel edge fastening schedule, and the adjacent studs are attached together with two rows of 10d box nails [3 inches by 0.128 inch (76.2 mm by 3.25 mm)] at 10 inches o.c. (254 mm).
    2. Blocking at horizontal joints shall not be required in wall segments that are not counted as braced wall panels.
    3. Where Method GB panels are installed horizontally, blocking of horizontal joints is not required.

    R602.10.5 Minimum length of a braced wall panel. The minimum length of a braced wall panel shall comply with Table R602.10.5. For Methods CS-WSP and CS-SFB, the minimum panel length shall be based on the adjacent clear opening height in accordance with Table R602.10.5 and Figure R602.10.5. Where a panel has an opening on either side of differing heights, the taller opening height shall be used to determine the panel length.

    |TABLE R602.10.

  • CRC § 0.70 High relevance — show source text

    Use 30 psf ground snow load for cases in which ground snow load is less than 30 psf and the roof live load is equal to or less than 20 psf.
    f. Spans are calculated assuming the top of the header or girder is laterally braced by perpendicular framing. Where the top of the header or girder is not laterally braced (for
    example, cripple studs bearing on the header), tabulated spans for headers consisting of 2 × 8, 2 × 10, or 2 × 12 sizes shall be multiplied by 0.70 or the header or girder shall be
    designed.|For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square foot = 0.0479 kPa.
    a. Spans are given in feet and inches.
    b. Spans are based on minimum design properties for No. 2 grade lumber of Douglas fir-larch, hem-fir, Southern pine, and spruce-pine-fir.
    c. Building width is measured perpendicular to the ridge. For widths between those shown, spans are permitted to be interpolated.
    d. NJ = Number of jack studs required to support each end. Where the number of required jack studs equals one, the header is permitted to be supported by an approved fram-
    ing anchor attached to the full-height wall stud and to the header.
    e. Use 30 psf ground snow load for cases in which ground snow load is less than 30 psf and the roof live load is equal to or less than 20 psf.
    f. Spans are calculated assuming the top of the header or girder is laterally braced by perpendicular framing. Where the top of the header or girder is not laterally braced (for
    example, cripple studs bearing on the header), tabulated spans for headers consisting of 2 × 8, 2 × 10, or 2 × 12 sizes shall be multiplied by 0.70 or the header or girder shall be
    designed.|For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square foot = 0.0479 kPa.
    a. Spans are given in feet and inches.
    b. Spans are based on minimum design properties for No. 2 grade lumber of Douglas fir-larch, hem-fir, Southern pine, and spruce-pine-fir.
    c. Building width is measured perpendicular to the ridge. For widths between those shown, spans are permitted to be interpolated.
    d. NJ = Number of jack studs required to support each end. Where the number of required jack studs equals one, the header is permitted to be supported by an approved fram-
    ing anchor attached to the full-height wall stud and to the header.
    e. Use 30 psf ground snow load for cases in which ground snow load is less than 30 psf and the roof live load is equal to or less than 20 psf.
    f. Spans are calculated assuming the top of the header or girder is laterally braced by perpendicular framing. Where the top of the header or girder is not laterally braced (for
    example, cripple studs bearing on the header), tabulated spans for headers consisting of 2 × 8, 2 × 10, or 2 × 12 sizes shall be multiplied by 0.70 or the header or girder shall be
    designed.|

    |TABLE R602.

  • CRC § 1.20 Medium relevance — show source text

    Interpolation shall not be permitted.
    b. Cripple walls or wood-framed basement walls in a walk-out condition shall be designated as the first story and the stories above shall be redesignated as the second and third
    stories, respectively, and shall be prohibited in a three-story structure.
    c. Actual lengths of the sides of the circumscribed rectangle shall be rounded to the next highest unit of 10 when using this table.
    d. For Exposure Category C, multiply bracing units by a factor of 1.20 for a one-story building, 1.30 for a two-story building and 1.40 for a three-story building.|For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 mile per hour = 0.447m/s.
    a. Interpolation shall not be permitted.
    b. Cripple walls or wood-framed basement walls in a walk-out condition shall be designated as the first story and the stories above shall be redesignated as the second and third
    stories, respectively, and shall be prohibited in a three-story structure.
    c. Actual lengths of the sides of the circumscribed rectangle shall be rounded to the next highest unit of 10 when using this table.
    d. For Exposure Category C, multiply bracing units by a factor of 1.20 for a one-story building, 1.30 for a two-story building and 1.40 for a three-story building.|

    6-52 2025 CALIFORNIA RESIDENTIAL CODE

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    WALL CONSTRUCTION

    R602.12.5 Distribution of bracing units. The placement of bracing units on exterior walls shall meet all of the following requirements as shown in Figure R602.12.5.

    1. A bracing unit shall begin not more than 12 feet (3658 mm) from any wall corner.
    2. The distance between adjacent edges of bracing units shall be not greater than 20 feet (6096 mm).
    3. Segments of wall greater than 8 feet (2438 mm) in length shall have not less than one bracing unit.

    FIGURE R602.12.5—BRACING UNIT DISTRIBUTION

    20 FT. 12 FT. 20 FT.

    WALL WALL WALL CORNER CORNER CORNER

    4 FT. BRACING UNIT

    3 FT. BRACING UNIT

    Col1 20 FT. 12 FT. Col4
    MAX MAX MAX
    Col1 20 FT. Col3 Col4
    MAX MAX MAX

    MULTIPLE BRACING UNITS MULTIPLE BRACING UNITS EQUAL LENGTH DIVIDED BY 4 EQUAL LENGTH DIVIDED BY 3

    BRACING WITH AREAS BETWEEN BRACING UNITS WITH ALL FRAMED COVERED WITH OTHER MATERIALS PORTIONS OF WALL SHEATHED

    For SI: 1 foot = 304.8 mm.

    R602.12.6 Narrow panels. The bracing methods referenced in Section R602.10 and specified in Sections R602.12.6.1 through R602.12.6.3 shall be permitted where using simplified wall bracing.

  • CRC § 0.75 Medium relevance — show source text

    SEE
    SEE ALTERNATES BELOW FOR VERTICAL
    PANEL JOINTS
    8d NAILS AT 12 IN. ON CENTE
    STUDS. MIN 2 NAILS EACH S
    8d N
    ON A
    INDI
    1IN.
    CLEAR
    1IN.
    CLEAR
    0.75H MIN| |||1IN.
    CLEAR
    1IN.
    CLEAR
    0.75H MIN|1IN.
    CLEAR
    1IN.
    CLEAR
    0.75H MIN| ||||| ||||8d N
    ON A
    INDI| |GROUN
    EXISTING VENT
    OLT|GROUN
    EXISTING VENT
    OLT|GROUN
    EXISTING VENT
    OLT|GROUN
    EXISTING VENT
    OLT|

    NEW 2x CRIPPLE STUD NAILED TO EXISTING STUD WITH 16d COMMON NAILS AT 6 IN. ON CENTER AT WOOD STRUCTURAL PANEL JOINT. 3 NAILS MIN.

    GROUND LEVEL

    EXISTING FOUNDATION WALL

    1 [/ IN. MIN] 8 1 [/ IN. MIN] 8

    Col1 Col2 Col3 Col4 NEW
    NE
    EXIS
    NAIL
    STR
    3 NA
    1

    3/ IN. MIN
    8    		 1

    3/ IN. MIN
    8    		 3/ IN. MIN
    8    		 3/ IN. MIN
    8    		 3/ IN. MIN
    8
    ISTING STUD Col2 Col3
    ISTING STUD
    IN. MIN
    2
    1
    2/ IN. MIN
    1
    2/ IN. MIN
    8    		 ISTING STUD
    IN. MIN
    2
    1
    2/ IN. MIN
    1
    2/ IN. MIN
    8    		 ISTING STUD
    IN. MIN
    2
    1
    2/ IN. MIN
    1
    2/ IN. MIN
    8
    1
    / IN. MIN
    3/ IN. MIN
    8    		 1
    / IN. MIN
    3/ IN. MIN
    8    		 3/ IN. MIN
    8

    VERTICAL SPLICE AT DOUBLE STUD VERTICAL SPLICE AT SINGLE STUD

    For SI: 1 inch = 25.4 mm.

    [BS] A304.4.1.1 Sheathing installation requirements. Wood structural panel sheathing shall be not less than [15] / 32 -inch (12 mm) thick and shall be installed in accordance with Figure A304.4.1(1) or A304.4.1(2). Individual pieces of wood structural panels shall be nailed with 8d common nails spaced 4 inches (102 mm) on center at all edges and 12 inches (305 mm) on center at each intermediate support with not less than two nails for each stud. Nails shall be driven so that their heads are flush with the surface of the sheathing and shall penetrate the supporting member not less than 1 [1] / 2 inches (38 mm). When a nail fractures the surface, it shall be left in place and not counted as part of the required nailing.

  • CRC § 11.2 Medium relevance — show source text

    FIGURE R602.11.2—STEPPED FOUNDATION CONSTRUCTION

    WHERE FOOTING SECTION “A” IS MORE THAN 8 FT

    2x CRIPPLE STUD WALL

    CONCRETE STEPPED FOOTING

    For SI: 1 foot = 304.8 mm.

    Note: Where footing Section “A” is less than 8 feet long in a 25-foot-long wall, install bracing at cripple stud wall.

    6-50 2025 CALIFORNIA RESIDENTIAL CODE

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    WALL CONSTRUCTION

    R602.12 Simplified wall bracing. Buildings meeting all of the following conditions shall be permitted to be braced in accordance with this section as an alternative to the requirements of Section R602.10. The entire building shall be braced in accordance with this section; the use of other bracing provisions of Section R602.10, except as specified herein, shall not be permitted.

    1. There shall be not more than three stories above the top of a concrete or masonry foundation or basement wall. Permanent wood foundations shall not be permitted.

    2. Floors shall not cantilever more than 24 inches (607 mm) beyond the foundation or bearing wall below.

    3. Wall height shall not be greater than 10 feet (3048 mm).

    4. The building shall have a roof eave-to-ridge height of 15 feet (4572 mm) or less.

    5. Exterior walls shall have gypsum board with a minimum thickness of [1] / 2 inch (12.7 mm) installed on the interior side fastened in accordance with Table R702.3.5.

    6. The structure shall be located where the ultimate design wind speed is less than or equal to 130 mph (58 m/s), and the exposure category is B or C.

    7. The structure shall be located in Seismic Design Category A, B or C for detached one- and two-family dwellings or Seismic Design Category A or B for townhouses.

    8. Cripple walls shall not be permitted in three-story buildings.

    R602.12.1 Circumscribed rectangle. The bracing required for each building shall be determined by circumscribing a rectangle around the entire building on each floor as shown in Figure R602.12.1. The rectangle shall surround all enclosed offsets and projections such as sunrooms and attached garages. Open structures, such as carports and decks, shall be permitted to be excluded. The rectangle shall not have a side greater than 60 feet (18 288 mm), and the ratio between the long side and short side shall be not greater than 3:1.

    FIGURE R602.12.1—RECTANGLE CIRCUMSCRIBING AN ENCLOSED BUILDING

    LONG SIDE

    TYPICAL SEGMENTS OF TYPICAL SEGMENTS OF WALL BETWEEN CORNERS WALL BETWEEN CORNERS

    Col1 LONG SIDE
    TYPICAL SEGMENTS OF
    WALL BETWEEN CORNERS
    TYPICAL
    WALL
    CORNER
    LONG SIDE
    CIRCUMSCRIBING RECTANGLE
    SHORT SIDE SHORT SIDE
    Col1 Col2
    TYPICAL SEGMENTS OF
    WALL BETWEEN CORNERS    		 TYPICAL SEGMENTS OF
    WALL BETWEEN CORNERS
    CIRCUMSCRIBING RECTANGLE

    FIRST FLOOR PLAN SECOND FLOOR PLAN

  • CRC § 0.120 Medium relevance — show source text

    fastener**
    horizontal spacing| |CLADDING FASTENER
    THROUGH FOAM
    SHEATHING INTO:|CLADDING FASTENER
    TYPE AND MINIMUM SIZEc|CLADDING FASTENER
    VERTICAL SPACING
    (INCHES)|Cladding weight:|Cladding weight:|Cladding weight:|Cladding weight:|Cladding weight:|Cladding weight:|Cladding weight:|Cladding weight:| |CLADDING FASTENER
    THROUGH FOAM
    SHEATHING INTO:|CLADDING FASTENER
    TYPE AND MINIMUM SIZEc|CLADDING FASTENER
    VERTICAL SPACING
    (INCHES)|**3 **
    psf|11
    psf|18
    psf|25
    psf|**3 **
    psf|11
    psf|18
    psf|25
    psf| |Wood Framing
    (minimum 11/4- inch
    penetration)b|0.120" diameter nail|6|3.00|1.70|0.90|0.55|3.00|1.05|0.50|DR| |Wood Framing
    (minimum 11/4- inch
    penetration)b|0.120" diameter nail|8|3.00|1.20|0.60|DR|3.00|0.70|DR|DR| |Wood Framing
    (minimum 11/4- inch
    penetration)b|0.120" diameter nail|12|3.00|0.70|DR|DR|2.15|DR|DR|DR| |Wood Framing
    (minimum 11/4- inch
    penetration)b|0.131" diameter nail|6|4.00|2.15|1.20|0.75|4.00|1.35|0.70|DR| |Wood Framing
    (minimum 11/4- inch
    penetration)b|0.131" diameter nail|8|4.00|1.55|0.80|DR|4.00|0.90|DR|DR| |Wood Framing
    (minimum 11/4- inch
    penetration)b|0.131" diameter nail|12|4.00|0.90|DR|DR|2.70|0.50|DR|DR| |Wood Framing
    (minimum 11/4- inch
    penetration)b|0.162" diameter nail|6|4.00|3.55|2.05|1.40|4.00|2.25|1.25|0.80| |Wood Framing
    (minimum 11/4- inch
    penetration)b|0.162" diameter nail|8|4.00|2.55|1.45|0.95|4.00|1.60|0.85|0.50| |Wood Framing
    (minimum 11/4- inch
    penetration)b|0.162" diameter nail|12|4.00|1.60|0.85|0.50|4.00|0.95|DR|DR| |For SI: 1 inch = 25.

  • CRC § 2.4 Medium relevance — show source text

    Framing members that are both load-bearing and stabilization members shall meet the requirements of Section R602 and this section. Nonstructural stabilization members shall be not more than 32 inches (813 mm) on center. 2. Horizontal stabilization shall be installed at not more than 24 inches (610 mm) on center and in accordance with Figure BI103.2.4(1), BI103.2.4(2) or BI103.2.4(3). Horizontal stabilization shall be of any of the following with the stated minimum dimensions: [3] / 4 -inch (19.1 mm) bamboo, [1] / 2 -inch (12.7 mm) fiberglass rod, 1-inch (25 mm) wood dowel or nominal 1-inch by 2-inch (25 mm by 51 mm) wood.

    FIGURE BI103.2.4(1)—LIGHT STRAW-CLAY WALL WITH LARSEN TRUSSES

    DOUBLE TOP PLATE

    VERTICAL SOLID BLOCKING

    FLAT SOLID BLOCKING

    LADDER (LARSEN) TRUSSES MADE WITH 2x4s AND GUSSETS PER SECTION BI103.2.4, ITEM 1

    GUSSETS: [3] / 8 ″ x 3 ″ PLYWOOD OR 1x4 FASTENERS: 4–4d NAILS OR 4–1¾ ″ STAPLES

    WOOD OR METAL STRAP BRACING (LIB) PER TABLE 602.10.4 WHERE APPLICABLE PER SECTION R602.10

    LIGHT STRAW-CLAY INFILL

    HORIZONTAL STABILIZATION OF LIGHT STRAW-CLAY PER SECTION BI103.4, ITEM 2

    ANCHORAGE PER SECTION R403.1.6

    2X SILL PLATE

    CONCRETE OR MASONRY FOUNDATION PER SECTION R401

    FRAMING FASTENERS PER TABLE R602.3(1)

    For SI: 1 inch = 25.4 mm.

    APPENDIX BI-4 2025 CALIFORNIA RESIDENTIAL CODE

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    APPENDIX BI — LIGHT STRAW-CLAY CONSTRUCTION

    FIGURE BI103.2.4(2)—LIGHT STRAW-CLAY WALL, SINGLE STUD WIDTH

    DOUBLE TOP PLATE

    FLAT SOLID BLOCKING

    WOOD METAL STRAP BRACING (LIB) PER TABLE R602.10.4 WHERE APPLICABLE PER SECTION R602.10

    2X STUDS PER SECTION BI103.2.4, ITEM 1

    1x1 CLEAT CENTERED ON EACH STUD FACE BETWEEN HORIZONTAL STABILIZATION

    HORIZONTAL STABILIZATION OF LIGHT STRAW-CLAY PER SECTION BI103.2.4, ITEM 2

    LIGHT STRAY-CLAY INFILL

    ANCHORAGE PER SECTION R403.1.6

    2X SILL PLATE

    CONCRETE OR MASONRY FOUNDATION PER SECTION R401

    FRAMING FASTENERS PER TABLE R602.3(1)

    FIGURE BI103.2.4(3)—LIGHT STRAW-CLAY WALL WITH BLIND STUDS

    DOUBLE TOP PLATES

    2X LET-IN PLATE

    WOOD METAL BRACING (LIB) PER TABLE R602.10.4 WHERE APPLICABLE PER SECTION R602.10

    2x6 MINIMUM STUDS PER SECTION BI103.2.4, ITEM 1

    LIGHT STRAW-CLAY INFILL

  • California Residential Code Medium relevance — show source text

    b, d**|** MINIMUM NUMBER OF**
    BRACING UNITS ON EACH LONG SIDEa, b, d|** MINIMUM NUMBER OF**
    BRACING UNITS ON EACH LONG SIDEa, b, d|** MINIMUM NUMBER OF**
    BRACING UNITS ON EACH LONG SIDEa, b, d|** MINIMUM NUMBER OF**
    BRACING UNITS ON EACH LONG SIDEa, b, d|** MINIMUM NUMBER OF**
    BRACING UNITS ON EACH LONG SIDEa, b, d|** MINIMUM NUMBER OF**
    BRACING UNITS ON EACH SHORT SIDEa, b, d|** MINIMUM NUMBER OF**
    BRACING UNITS ON EACH SHORT SIDEa, b, d|** MINIMUM NUMBER OF**
    BRACING UNITS ON EACH SHORT SIDEa, b, d|** MINIMUM NUMBER OF**
    BRACING UNITS ON EACH SHORT SIDEa, b, d|** MINIMUM NUMBER OF**
    BRACING UNITS ON EACH SHORT SIDEa, b, d|** MINIMUM NUMBER OF**
    BRACING UNITS ON EACH SHORT SIDEa, b, d| |** ULTIMATE**
    DESIGN
    WIND SPEED
    (mph)|** STORY LEVEL**|** EAVE-TO-
    RIDGE HEIGHT
    (feet)| Length of short side**
    (feet)c|** Length of short side**
    (feet)c|** Length of short side**
    (feet)c|** Length of short side**
    (feet)c|** Length of short side**
    (feet)c|** Length of short side**
    (feet)c|** Length of long side**
    (feet)c|** Length of long side**
    (feet)c|** Length of long side**
    (feet)c|** Length of long side**
    (feet)c|** Length of long side**
    (feet)c|** Length of long side**
    (feet)c| |** ULTIMATE**
    DESIGN
    WIND SPEED
    (mph)|** STORY LEVEL**|** EAVE-TO-
    RIDGE HEIGHT
    (feet)| 10**|** 20**|** 30**|** 40**|** 50**|** 60**|** 10**|** 20**|** 30**|** 40**|** 50**|**

  • CRC § 25.4 Medium relevance — show source text

    For SI: 1 inch = 25.4 mm.

    2025 CALIFORNIA RESIDENTIAL CODE 6-47

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    WALL CONSTRUCTION

    FIGURE R602.10.8.2(2)—BRACED WALL PANEL CONNECTION OPTION TO PERPENDICULAR RAFTERS OR ROOF TRUSSES

    For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm. a. Methods of bracing shall be as described in Section R602.10.4.

    FIGURE R602.10.8.2(3)—BRACED WALL PANEL CONNECTION OPTION TO PERPENDICULAR RAFTERS OR ROOF TRUSSES

    WHERE AIR GAP AT TOP IS NOT USED, CENTER W/3 AVAILABLE FOR VENT HOLES

    Col1 Col2 Col3 Col4 Col5 W Col7 Col8 Col9 Col10 Col11
    W/3
    ROOF SHEATHING Col2 Col3 Col4 Col5 Col6 Col7
    BRACED WALL
    PANEL
    2x
    BLK’G
    VENTING
    A
    BRACING
    a
    EDGE NAILING PER
    TABLE R602.3(1) (TYP)

    2 MAX
    OPEN
    ″
    ROOF
    TRUSSES
    PER
    R802.10    		 BRACED WALL
    PANEL
    2x
    BLK’G
    VENTING
    A
    BRACING
    a
    EDGE NAILING PER
    TABLE R602.3(1) (TYP)

    2 MAX
    OPEN
    ″
    ROOF
    TRUSSES
    PER
    R802.10    		 BRACED WALL
    PANEL
    2x
    BLK’G
    VENTING
    A
    BRACING
    a
    EDGE NAILING PER
    TABLE R602.3(1) (TYP)

    2 MAX
    OPEN
    ″
    ROOF
    TRUSSES
    PER
    R802.10    		 BRACED WALL
    PANEL
    2x
    BLK’G
    VENTING
    A
    BRACING
    a
    EDGE NAILING PER
    TABLE R602.3(1) (TYP)

    2 MAX
    OPEN
    ″
    ROOF
    TRUSSES
    PER
    R802.10    		 BRACED WALL
    PANEL
    2x
    BLK’G
    VENTING
    A
    BRACING
    a
    EDGE NAILING PER
    TABLE R602.3(1) (TYP)

    2 MAX
    OPEN
    ″
    ROOF
    TRUSSES
    PER
    R802.10    		 BRACED WALL
    PANEL
    2x
    BLK’G
    VENTING
    A
    BRACING
    a
    EDGE NAILING PER
    TABLE R602.
  • CRC § 1.20 Medium relevance — show source text

    Actual lengths of the sides of the circumscribed rectangle shall be rounded to the next highest unit of 10 when using this table.
    d. For Exposure Category C, multiply bracing units by a factor of 1.20 for a one-story building, 1.30 for a two-story building and 1.40 for a three-story building.|For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 mile per hour = 0.447m/s.
    a. Interpolation shall not be permitted.
    b. Cripple walls or wood-framed basement walls in a walk-out condition shall be designated as the first story and the stories above shall be redesignated as the second and third
    stories, respectively, and shall be prohibited in a three-story structure.
    c. Actual lengths of the sides of the circumscribed rectangle shall be rounded to the next highest unit of 10 when using this table.
    d. For Exposure Category C, multiply bracing units by a factor of 1.20 for a one-story building, 1.30 for a two-story building and 1.40 for a three-story building.|For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 mile per hour = 0.447m/s.
    a. Interpolation shall not be permitted.
    b. Cripple walls or wood-framed basement walls in a walk-out condition shall be designated as the first story and the stories above shall be redesignated as the second and third
    stories, respectively, and shall be prohibited in a three-story structure.
    c. Actual lengths of the sides of the circumscribed rectangle shall be rounded to the next highest unit of 10 when using this table.
    d. For Exposure Category C, multiply bracing units by a factor of 1.20 for a one-story building, 1.30 for a two-story building and 1.40 for a three-story building.|For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 mile per hour = 0.447m/s.
    a. Interpolation shall not be permitted.
    b. Cripple walls or wood-framed basement walls in a walk-out condition shall be designated as the first story and the stories above shall be redesignated as the second and third
    stories, respectively, and shall be prohibited in a three-story structure.
    c. Actual lengths of the sides of the circumscribed rectangle shall be rounded to the next highest unit of 10 when using this table.
    d. For Exposure Category C, multiply bracing units by a factor of 1.20 for a one-story building, 1.30 for a two-story building and 1.40 for a three-story building.|For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 mile per hour = 0.447m/s.
    a. Interpolation shall not be permitted.
    b. Cripple walls or wood-framed basement walls in a walk-out condition shall be designated as the first story and the stories above shall be redesignated as the second and third
    stories, respectively, and shall be prohibited in a three-story structure.
    c. Actual lengths of the sides of the circumscribed rectangle shall be rounded to the next highest unit of 10 when using this table.
    d. For Exposure Category C, multiply bracing units by a factor of 1.20 for a one-story building, 1.30 for a two-story building and 1.40 for a three-story building.|

  • CRC § 25.4 Medium relevance — show source text

    60**| |115||10|1|2|2|2|3|3|1|2|2|2|3|3| |115|||2|3|3|4|5|6|2|3|3|4|5|6| |115|||2|3|4|6|7|8|2|3|4|6|7|8| |115||15|1|2|3|3|4|4|1|2|3|3|4|4| |115|||2|3|4|5|6|7|2|3|4|5|6|7| |115|||2|4|5|6|7|9|2|4|5|6|7|9| |130||10|1|2|2|3|3|4|1|2|2|3|3|4| |130|||2|3|4|5|6|7|2|3|4|5|6|7| |130|||2|4|5|7|8|10|2|4|5|7|8|10| |130||15|2|3|3|4|4|6|2|3|3|4|4|6| |130|||3|4|6|7|8|10|3|4|6|7|8|10| |130|||3|6|7|10|11|13|3|6|7|10|11|13| |For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 mile per hour = 0.447m/s.
    a. Interpolation shall not be permitted.
    b. Cripple walls or wood-framed basement walls in a walk-out condition shall be designated as the first story and the stories above shall be redesignated as the second and third
    stories, respectively, and shall be prohibited in a three-story structure.
    c. Actual lengths of the sides of the circumscribed rectangle shall be rounded to the next highest unit of 10 when using this table.
    d. For Exposure Category C, multiply bracing units by a factor of 1.20 for a one-story building, 1.30 for a two-story building and 1.40 for a three-story building.|For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 mile per hour = 0.447m/s.
    a. Interpolation shall not be permitted.
    b. Cripple walls or wood-framed basement walls in a walk-out condition shall be designated as the first story and the stories above shall be redesignated as the second and third
    stories, respectively, and shall be prohibited in a three-story structure.
    c. Actual lengths of the sides of the circumscribed rectangle shall be rounded to the next highest unit of 10 when using this table.
    d. For Exposure Category C, multiply bracing units by a factor of 1.20 for a one-story building, 1.30 for a two-story building and 1.40 for a three-story building.|For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 mile per hour = 0.447m/s.
    a. Interpolation shall not be permitted.
    b.

Frequently asked questions

What if part of my walls are sheathed and part are covered with other materials?

If any framed wall areas between bracing units are covered with other materials, the 4‑ft minimum bracing unit length applies (instead of 3‑ft). Then count units by dividing segment length by 4 ft and still confirm minimums in Table R602.12.4. § R602.12.3(2)

Can I mix wood panels and fiberboard sheathing on the same story?

No. Mixing is prohibited on the same story — you must choose one permitted sheathing type for that story’s bracing. § R602.12.2; § R602.12.3

Do interior partition walls count as bracing?

No. Interior walls do not contribute toward required sheathing‑only bracing units; only exterior full‑height sheathed segments count. § R602.12.3

Where do I find how many units I need on each side of the building?

Refer to Table R602.12.4 and § R602.12.4 — the required number depends on your site’s ultimate design wind speed, number of stories, and the circumscribed rectangle side lengths. § R602.12.4

What fasteners and spacing do I use for the sheathing?

Use the fastening schedules referenced by § R602.12.2 (see Table R602.3 entries appropriate to the sheathing material for edge/field spacing and nail type). § R602.12.2

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