CRC · California Residential Code

What bracing methods are allowed and how is required bracing calculated?

Homeowners: the CRC requires specific named bracing methods, full‑height braced wall panels placed close to each end of each braced wall line, and a minimum total length of braced panels taken from the R602.10.3 tables (then multiplied by adjustment factors like wall height). Check the tables and the method connection details in § R602.10 to determine exactly how much bracing your house needs.

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Last reviewed: July 6, 2026

What the code requires — in plain English

The California Residential Code requires you to use one of the enumerated bracing methods for every braced wall line, place full‑height braced wall panels at specified locations, and provide a minimum total length of bracing along each braced wall line as taken from the tables. The procedure for determining required lengths uses the tables in § R602.10.3 (choose Table R602.10.3(1) or R602.10.3(3) as directed) and then applies the adjustment factors in Table R602.10.3(4) where applicable. See § R602.10.2 for panel location rules and § R602.10.4 for the allowed methods and their construction details.

The most important rule: place full‑height braced wall panels so each panel edge is within 10 feet of a braced‑wall‑line end, and provide the total length of bracing required by Table R602.10.3 (then apply the adjustment factors in Table R602.10.3(4)).

Requirements in detail

Which bracing methods are allowed

The code separates methods into intermittent and continuous sheathing methods and lists specific named methods (for example LIB, DWB, WSP, CS‑WSP, CS‑G, CS‑PF, and others). Each method has minimum material/thickness and fastening criteria listed in the bracing‑methods table. Use the method descriptions and connection criteria in § R602.10.4 and Table R602.10.4.

  • Intermittent methods include (but are not limited to) LIB (let‑in bracing), DWB (diagonal wood boards), WSP (wood structural panels), etc.
  • Continuous sheathing methods (for example CS‑WSP, CS‑G, CS‑PF) require structural panel sheathing on all sheathable surfaces on one side of the braced wall line and must meet the continuous‑sheathing rules in § R602.10.4.2 and related end‑condition requirements in § R602.10.7.

Where panels go and minimum counts

  • The nearest edge of any braced wall panel must be within 10 feet of each end of a braced wall line. The distance between adjacent panel edges along a braced wall line must not exceed 20 feet. See § R602.10.2.2.
  • A braced wall line ≤ 16 feet long must have at least two braced wall panels (or one panel ≥ 48 inches). Braced wall lines > 16 feet must have at least two panels. See § R602.10.2.3.

How required length is determined (overview)

  1. Determine which table to use:
    • All buildings in Seismic Design Categories A and B use Table R602.10.3(1) (then apply adjustments in Table R602.10.3(2)).
    • Detached buildings in SDC C also use Table R602.10.3(1).
    • Other conditions (townhouses, SDC D0/D1/D2, etc.) use Table R602.10.3(3) as specified in § R602.10.3.
  2. Read the base required length (the table gives minimum total linear feet of braced wall panel required along a braced wall line for each method and condition).
  3. Apply adjustment factors from Table R602.10.3(2) and Table R602.10.3(4) where called out (examples: wall height, braced wall line spacing, seismic adjustments).
  4. Observe special notes (e.g., some methods are limited by story count, some are not permitted in certain SDCs).

Key decision dimensions / values (quick reference)

Decision item Key value(s) or rule Code reference
Max distance from braced‑wall‑line end to nearest panel edge 10 ft § R602.10.2.2
Max spacing between panel edges along a braced wall line 20 ft § R602.10.2.2
Minimum panels for short braced wall line (≤ 16 ft) 2 panels, or 1 panel ≥ 48 in. § R602.10.2.3
Which tables supply base lengths Table R602.10.3(1) (SDC A,B, detached C) or Table R602.10.3(3) (other listed conditions) § R602.10.3
Wall height adjustment factor examples ≤10 ft → 1.0; >10 ft ≤12 ft → 1.2 Table R602.10.3(4) (Item 1)
Braced wall line spacing adjustment (townhouses, SDC C) ≤35 ft → 1.0; >35 ft ≤50 ft → 1.43 Table R602.10.3(4) (Item 2)
Aspect ratio limits for panel types Types A, B, E ≤ 1:1; Types C, D ≤ 2:1 Notes to Table R602.10.3 (various)
Continuous sheathing requirement Structural panels on all sheathable surfaces on one side of the braced wall line § R602.10.4.2
Mixing methods rules Allowed with conditions; length determined using highest intermittent-method requirement and adjustments per § R602.10.4.1 § R602.10.4.1

Note: the base numeric lengths for each named method (the values you read directly from Table R602.10.3(1) or (3)) are in those tables and must be read from the table for your SDC, building type and chosen method. The adjustment multipliers in Table R602.10.3(4) (examples above) are then applied to those base table values.

Exceptions & special cases

  • Some methods are not permitted in certain Seismic Design Categories; for example PFG and CS‑SFB do not apply in SDC D0, D1 and D2. See method notes in Table R602.10.4 and table footnotes.
  • Methods PFH, PFG and ABW are limited to a single story or the first of two stories per their table notes.
  • Continuous sheathing methods require that all sheathable surfaces on one side of the braced wall line be sheathed (and end conditions for continuous sheathing must meet § R602.10.7). § R602.10.4.2.
  • Where gypsum board is omitted on the interior side (exception applies), the required lengths in Tables R602.10.3(1) and (3) must be multiplied by the appropriate factors in Tables R602.10.3(2) and R602.10.3(4) as stated in § R602.10.4 notes.

If a specific numeric base length or adjustment you need is not shown above, consult the applicable Table R602.10.3(1) or R602.10.3(3) entries for that method and condition (those tables list the starting linear feet of bracing per method).

Common mistakes

  • Assuming any sheathing equals a continuous sheathing method — continuous methods require sheathing on all sheathable surfaces on one side of the entire braced wall line (see § R602.10.4.2).
  • Forgetting to apply adjustment factors (wall height, braced‑wall‑line spacing, seismic adjustments) after reading the base table values — these multipliers can increase required bracing significantly. See Table R602.10.3(4) and § R602.10.3.
  • Placing braced panels too far from the ends (must be ≤ 10 ft from each end) or letting spacing between adjacent panel edges exceed 20 ft.
  • Mixing methods without following the explicit mixing rules in § R602.10.4.1 (especially in higher SDCs or where wind speed limits apply).

Worked example — how to calculate required bracing (procedure; no invented table numbers)

You have: a detached one‑story house in SDC D1, wall height 11 ft, braced wall line length 40 ft, you want to use method WSP (wood structural panel).

  1. Identify the correct base table:
    • For SDC D1 (seismic bracing), the code directs you to Table R602.10.3(3) for the base required lengths for methods used in SDC D categories. See § R602.10.3.
  2. Read the base required length for Method WSP from Table R602.10.3(3) for your braced wall‑line length and conditions. Call that Lbase (linear feet). (I did not retrieve the full numeric cells of Table R602.10.3(3) in the excerpts available here, so read Lbase from the table in the code.)
  3. Apply wall‑height adjustment from Table R602.10.3(4): wall height 11 ft falls into the >10 ft and ≤12 ft category, which uses a factor of 1.2. So compute L1 = Lbase × 1.2.
  4. Apply any other applicable adjustments (e.g., braced wall‑line spacing adjustments, or special SDC factors). If none apply, L1 is the required total linear feet of braced wall panels along that braced wall line. See § R602.10.3 and Table R602.10.3(4).
  5. Place braced wall panels so panel edges are within 10 ft of each end and no more than 20 ft between panel edges, and provide hold‑downs/fastening per the method‑specific connection criteria in Table R602.10.4.

Important: I did not retrieve the explicit numeric Lbase table entries from Tables R602.10.3(1)/(3) in the file excerpts returned here; to obtain the final numeric required length you must consult the full Table R602.10.3(1) or (3) in the CRC for your exact method, SDC and braced‑wall‑line condition.

Related provisions

  • Braced wall panel definitions, locations and uplift load path — § R602.10.2.
  • Bracing methods and connection criteria table — § R602.10.4 and Table R602.10.4.
  • Required bracing length and which table to use — § R602.10.3 and Tables R602.10.3(1) / R602.10.3(3).
  • Adjustment factors (e.g., wall height, braced wall line spacing, seismic adjustments) — Table R602.10.3(4).
  • End conditions and continuous sheathing end requirements — § R602.10.7 (see references from § R602.10.4.2).

Code references

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

  • CRC § 10.4.1. High relevance — show source text

    Where more than one bracing method is used, mixing methods shall be in accordance with Section R602.10.4.1.
    h. One- and two-family dwellings in Seismic Design Category D2 exceeding two stories shall be designed in accordance with accepted engineering practice.|For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square foot = 0.0479 kPa.
    NP = Not Permitted.
    a. Linear interpolation shall be permitted.
    b. Interpolation of bracing length between the_Sds_ values associated with the seismic design categories shall be permitted when a site-specific_Sds_ value is determined in accor-
    dance with Section 1613.2 of the_California Building Code_.
    c. Where the braced wall line length is greater than 50 feet, braced wall lines shall be permitted to be divided into shorter segments having lengths of 50 feet or less, and the
    amount of bracing within each segment shall be in accordance with this table.
    d. Method LIB shall have gypsum board fastened to not less than one side with nails or screws in accordance with Table R602.3(1) for exterior sheathing or Table R702.3.5 for
    interior gypsum board. Spacing of fasteners at panel edges shall not exceed 8 inches.
    e. Methods PFG and CS-SFB do not apply in Seismic Design Categories D0, D1 and D2.
    f. Methods PFH, PFG and ABW are only permitted on a single story or a first of two stories.
    g. Where more than one bracing method is used, mixing methods shall be in accordance with Section R602.10.4.1.
    h. One- and two-family dwellings in Seismic Design Category D2 exceeding two stories shall be designed in accordance with accepted engineering practice.|

    6-32 2025 CALIFORNIA RESIDENTIAL CODE

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

    WALL CONSTRUCTION

    TABLE R602.10.3(4)—SEISMIC ADJUSTMENT FACTORS TO THE REQUIRED LENGTH OF WALL BRACING Col2 Col3 Col4 Col5 Col6
    ** ITEM**
    NUMBER    		 ** ADJUSTMENT**
    BASED ON    		 ** STORYg** ** CONDITION** ADJUSTMENT FACTORa, b
    [Multiply length from
    Table R602.10.3(3) by
    this factor]    		 ** APPLICABLE**
    METHODS
    1 Wall height
    (Section R602.10.3.1)    		 Any story ≤ 10 feet 1.0 All methods
    1 Wall height
    (Section R602.10.3.1)    		 Any story > 10 feet and ≤ 12 feet 1.2 1.2
    2 Braced wall line spacing,
    townhouses in SDC C    		 Any story ≤ 35 feet 1.0 1.0
    2 Braced wall line spacing,
    townhouses in SDC C    		 Any story > 35 feet and ≤ 50 feet 1.43 1.43
    3 Braced wall line spacing,
    in SDC D0, D1, D2 c    		 Any story > 25 feet and ≤ 30 feet 1.
  • CRC § 10.4 High relevance — show source text
    TABLE R602.10.4—BRACING METHODS Col2 Col3 Col4 Col5 Col6
    ** METHODS, MATERIAL** ** METHODS, MATERIAL** ** MINIMUM THICKNESS** ** FIGURE** ** CONNECTION CRITERIAa** ** CONNECTION CRITERIAa**
    ** METHODS, MATERIAL** ** METHODS, MATERIAL** ** MINIMUM THICKNESS** ** FIGURE** ** Fasteners** ** Spacing**
    Intermittent
    Bracing
    Methods    		 LIB
    Let-in-bracing    		 1 × 4 wood or approved
    metal straps at 45° to 60°
    angles for maximum
    16″ stud spacing    		 Wood: 2-8d
    common nails or 3-8d
    (21/2″ long × 0.113″ dia.) nails    		 Wood: per stud and
    top and bottom
    plates
    Intermittent
    Bracing
    Methods    		 LIB
    Let-in-bracing    		 1 × 4 wood or approved
    metal straps at 45° to 60°
    angles for maximum
    16″ stud spacing    		 Metal strap: per manufacturer Metal: per
    manufacturer
    Intermittent
    Bracing
    Methods    		 DWB
    Diagonal
    wood boards    		 3/4″ (1″ nominal) for
    maximum 24″ stud
    spacing    		 2-8d (21/2″ long × 0.113″ dia.)
    nails or 2-13/4″ long staples    		 Per stud
    Intermittent
    Bracing
    Methods    		 WSP
    Wood
    structural panel
    (See Section R604)    		 3/8″ Exterior sheathing
    per Table R602.3(3)    		 6″ edges 12″ field
    Intermittent
    Bracing
    Methods    		 WSP
    Wood
    structural panel
    (See Section R604)    		 3/8″ Interior sheathing per
    Table R602.3(1) or R602.3(2)    		 Varies by fastener

    6-34 2025 CALIFORNIA RESIDENTIAL CODE

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

    WALL CONSTRUCTION

    TABLE R602.10.4—BRACING METHODS—continued Col2 Col3 Col4 Col5 Col6
    ** METHODS, MATERIAL** ** METHODS, MATERIAL** ** MINIMUM THICKNESS** ** FIGURE** ** CONNECTION CRITERIAa** ** CONNECTION CRITERIAa**
    ** METHODS, MATERIAL** ** METHODS, MATERIAL** ** MINIMUM THICKNESS** ** FIGURE** ** Fasteners** ** Spacing**
    Intermittent
    Bracing
    Methods
    (continued)    		 BV-WSPe
    Wood structural
    panels with stone
    or masonry veneer
    (See Section
    R602.10.6.5)    		 7/16″ See Figure
    R602.10.6.5.2    		 8d common
    (21/2″ × 0.
  • CRC § 10.4.1 High relevance — show source text

    Applies to panels next to garage door opening where supporting gable end wall or roof load only. Shall only be used on one wall of the garage. In Seismic Design Categories D0,
    D1 and D2, roof covering dead load shall not exceed 3 psf.
    c. Garage openings adjacent to a Method CS-G panel shall be provided with a header in accordance with Table R602.7(1). A full-height clear opening shall not be permitted adja-
    cent to a Method CS-G panel.
    d. Method CS-SFB does not apply in Seismic Design Categories D0, D1 and D2.
    e. Method applies to detached one- and two-family dwellings in Seismic Design Categories D0 through D2 only.|

    R602.10.4.1 Mixing methods. Mixing of bracing methods shall be permitted as follows:

    1. Mixing intermittent bracing and continuous sheathing methods from story to story shall be permitted.
    2. Mixing intermittent bracing methods from braced wall line to braced wall line within a story shall be permitted. In regions within Seismic Design Categories A, B and C where the ultimate design wind speed is less than or equal to 130 mph (58 m/s), mixing of intermittent bracing and continuous sheathing methods from braced wall line to braced wall line within a story shall be permitted.
    3. Mixing intermittent bracing methods along a braced wall line shall be permitted in Seismic Design Categories A and B, and detached dwellings in Seismic Design Category C, provided that the length of required bracing in accordance with Table R602.10.3(1) or R602.10.3(3) is the highest value of all intermittent bracing methods used.
    4. 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.
    5. 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.
  • CRC § 25.4 High relevance — show source text

    Method applies to detached one- and two-family dwellings in Seismic Design Categories D0 through D2 only.|For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 degree = 0.0175 rad, 1 pound per square foot = 47.8 N/m2, 1 mile per hour = 0.447 m/s.
    a. Adhesive attachment of wall sheathing, including Method GB, shall not be permitted in Seismic Design Categories C, D0, D1 and D2.
    b. Applies to panels next to garage door opening where supporting gable end wall or roof load only. Shall only be used on one wall of the garage. In Seismic Design Categories D0,
    D1 and D2, roof covering dead load shall not exceed 3 psf.
    c. Garage openings adjacent to a Method CS-G panel shall be provided with a header in accordance with Table R602.7(1). A full-height clear opening shall not be permitted adja-
    cent to a Method CS-G panel.
    d. Method CS-SFB does not apply in Seismic Design Categories D0, D1 and D2.
    e. Method applies to detached one- and two-family dwellings in Seismic Design Categories D0 through D2 only.|For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 degree = 0.0175 rad, 1 pound per square foot = 47.8 N/m2, 1 mile per hour = 0.447 m/s.
    a. Adhesive attachment of wall sheathing, including Method GB, shall not be permitted in Seismic Design Categories C, D0, D1 and D2.
    b. Applies to panels next to garage door opening where supporting gable end wall or roof load only. Shall only be used on one wall of the garage. In Seismic Design Categories D0,
    D1 and D2, roof covering dead load shall not exceed 3 psf.
    c. Garage openings adjacent to a Method CS-G panel shall be provided with a header in accordance with Table R602.7(1). A full-height clear opening shall not be permitted adja-
    cent to a Method CS-G panel.
    d. Method CS-SFB does not apply in Seismic Design Categories D0, D1 and D2.
    e. Method applies to detached one- and two-family dwellings in Seismic Design Categories D0 through D2 only.|

    R602.10.4.1 Mixing methods. Mixing of bracing methods shall be permitted as follows:

    1. Mixing intermittent bracing and continuous sheathing methods from story to story shall be permitted.
    2. Mixing intermittent bracing methods from braced wall line to braced wall line within a story shall be permitted. In regions within Seismic Design Categories A, B and C where the ultimate design wind speed is less than or equal to 130 mph (58 m/s), mixing of intermittent bracing and continuous sheathing methods from braced wall line to braced wall line within a story shall be permitted.
    3. Mixing intermittent bracing methods along a braced wall line shall be permitted in Seismic Design Categories A and B, and detached dwellings in Seismic Design Category C, provided that the length of required bracing in accordance with Table R602.10.3(1) or R602.10.3(3) is the highest value of all intermittent bracing methods used.
  • CRC § 2308.10.3 High relevance — show source text


    NP = Not Permitted.
    a.
    This table specifies minimum requirements for braced wall panels along interior or exterior braced wall lines.
    b.
    See Section 2308.10.3 for full description of bracing methods.
    c.
    For Method GB, gypsum wallboard applied to framing supports that are spaced at 16 inches on center.
    d.
    The required lengths shall be doubled for gypsum board applied to only one face of a braced wall panel.
    e.
    Percentage shown represents the minimum amount of bracing required along the building length (or wall length if the structure has an irregular shape).|For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm.
    NP = Not Permitted.
    a.
    This table specifies minimum requirements for braced wall panels along interior or exterior braced wall lines.
    b.
    See Section 2308.10.3 for full description of bracing methods.
    c.
    For Method GB, gypsum wallboard applied to framing supports that are spaced at 16 inches on center.
    d.
    The required lengths shall be doubled for gypsum board applied to only one face of a braced wall panel.
    e.
    Percentage shown represents the minimum amount of bracing required along the building length (or wall length if the structure has an irregular shape).|For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm.
    NP = Not Permitted.
    a.
    This table specifies minimum requirements for braced wall panels along interior or exterior braced wall lines.
    b.
    See Section 2308.10.3 for full description of bracing methods.
    c.
    For Method GB, gypsum wallboard applied to framing supports that are spaced at 16 inches on center.
    d.
    The required lengths shall be doubled for gypsum board applied to only one face of a braced wall panel.
    e.
    Percentage shown represents the minimum amount of bracing required along the building length (or wall length if the structure has an irregular shape).|For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm.
    NP = Not Permitted.
    a.
    This table specifies minimum requirements for braced wall panels along interior or exterior braced wall lines.
    b.
    See Section 2308.10.3 for full description of bracing methods.
    c.
    For Method GB, gypsum wallboard applied to framing supports that are spaced at 16 inches on center.
    d.
    The required lengths shall be doubled for gypsum board applied to only one face of a braced wall panel.
    e.
    Percentage shown represents the minimum amount of bracing required along the building length (or wall length if the structure has an irregular shape).|For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm.
    NP = Not Permitted.
    a.
    This table specifies minimum requirements for braced wall panels along interior or exterior braced wall lines.
    b.
    See Section 2308.10.3 for full description of bracing methods.
    c.
    For Method GB, gypsum wallboard applied to framing supports that are spaced at 16 inches on center.
    d.
    The required lengths shall be doubled for gypsum board applied to only one face of a braced wall panel.
    e.
    Percentage shown represents the minimum amount of bracing required along the building length (or wall length if the structure has an irregular shape).|

    **2308.10.2 Braced wall panels.

  • CRC § 1.00 High relevance — show source text

    (minimum
    100% of wall length)e|SDS > 1.00: Each end and ≤
    25′- 0″ o.c. (minimum
    100% of wall length)e| |For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm.
    NP = Not Permitted.
    a.
    This table specifies minimum requirements for braced wall panels along interior or exterior braced wall lines.
    b.
    See Section 2308.10.3 for full description of bracing methods.
    c.
    For Method GB, gypsum wallboard applied to framing supports that are spaced at 16 inches on center.
    d.
    The required lengths shall be doubled for gypsum board applied to only one face of a braced wall panel.
    e.
    Percentage shown represents the minimum amount of bracing required along the building length (or wall length if the structure has an irregular shape).|For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm.
    NP = Not Permitted.
    a.
    This table specifies minimum requirements for braced wall panels along interior or exterior braced wall lines.
    b.
    See Section 2308.10.3 for full description of bracing methods.
    c.
    For Method GB, gypsum wallboard applied to framing supports that are spaced at 16 inches on center.
    d.
    The required lengths shall be doubled for gypsum board applied to only one face of a braced wall panel.
    e.
    Percentage shown represents the minimum amount of bracing required along the building length (or wall length if the structure has an irregular shape).|For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm.
    NP = Not Permitted.
    a.
    This table specifies minimum requirements for braced wall panels along interior or exterior braced wall lines.
    b.
    See Section 2308.10.3 for full description of bracing methods.
    c.
    For Method GB, gypsum wallboard applied to framing supports that are spaced at 16 inches on center.
    d.
    The required lengths shall be doubled for gypsum board applied to only one face of a braced wall panel.
    e.
    Percentage shown represents the minimum amount of bracing required along the building length (or wall length if the structure has an irregular shape).|For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm.
    NP = Not Permitted.
    a.
    This table specifies minimum requirements for braced wall panels along interior or exterior braced wall lines.
    b.
    See Section 2308.10.3 for full description of bracing methods.
    c.
    For Method GB, gypsum wallboard applied to framing supports that are spaced at 16 inches on center.
    d.
    The required lengths shall be doubled for gypsum board applied to only one face of a braced wall panel.
    e.
    Percentage shown represents the minimum amount of bracing required along the building length (or wall length if the structure has an irregular shape).|For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm.
    NP = Not Permitted.
    a.
    This table specifies minimum requirements for braced wall panels along interior or exterior braced wall lines.
    b.
    See Section 2308.10.3 for full description of bracing methods.
    c.
    For Method GB, gypsum wallboard applied to framing supports that are spaced at 16 inches on center.
    d.

  • 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.

  • CRC § 1.2. High relevance — show source text

    Wall bracing lengths are based on a soil site class D. Interpolation of bracing lengths between_SDS_ values associated with the seismic design categories is allowable where a
    site-specific_SDS_ value is determined in accordance with Section 1613 of the_California Building Code_.
    g. For total plaster thickness between 3 inches and 6 inches, the minimum total length of braced wall panels shall be multiplied by 1.2.|For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square foot = 0.0479 kPa.
    a. Interpolation is not permitted.
    b. Braced wall panels shall be without openings.
    c. Braced wall panel Types A, B and E shall have an aspect ratio (H:L) ≤ 1:1. Braced wall panelTypes C and D shall have an aspect ratio (H:L) ≤ 2:1.
    d. Subject to applicable seismic adjustment factors associated with Item 5 in Table R602.10.3(4).
    e. Cob braced wall panel types indicated shall comply with Section BK106.11 and Table BK106.11(1).
    f. Wall bracing lengths are based on a soil site class D. Interpolation of bracing lengths between_SDS_ values associated with the seismic design categories is allowable where a
    site-specific_SDS_ value is determined in accordance with Section 1613 of the_California Building Code_.
    g. For total plaster thickness between 3 inches and 6 inches, the minimum total length of braced wall panels shall be multiplied by 1.2.|

    TABLE BK106.11(4)—BRACING REQUIREMENTS FOR COB BRACED WALL PANELS BASED ON SEISMIC DESIGN CATEGORY B Col2 Col3 Col4 Col5 Col6 Col7
    •
    SOIL CLASS Df
    •
    TOTAL WALL HEIGHT = 10 FEET (INCLUDING STEM WALL AND BOND BEAM)
    •
    COB WALL HEIGHT PER TABLE BK106.11(1)
    •
    15 PSF ROOF-CEILING DEAD LOADd
    •
    STORY LOCATION: ONE-STORY BUILDING
    •
    SESIMIC DESIGN CATEGORY B
    •
    1.5″ PLASTER THICKNESS EACH SIDEg    		 •
    SOIL CLASS Df
    •
    TOTAL WALL HEIGHT = 10 FEET (INCLUDING STEM WALL AND BOND BEAM)
    •
    COB WALL HEIGHT PER TABLE BK106.11(1)
    •
    15 PSF ROOF-CEILING DEAD LOADd
    •
    STORY LOCATION: ONE-STORY BUILDING
    •
    SESIMIC DESIGN CATEGORY B
    •
    1.5″ PLASTER THICKNESS EACH SIDEg    		 •
    SOIL CLASS Df
    •
    TOTAL WALL HEIGHT = 10 FEET (INCLUDING STEM WALL AND BOND BEAM)
    •
    **COB WALL HEIGHT PER TABLE BK106.
  • CRC § 25.4 High 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 § 10.3 High relevance — show source text

    Subject to applicable seismic adjustment factors associated with “All methods” in Table R602.10.3(4), except “Wall dead load.”
    e. Strawbale braced wall panel types indicated shall comply with Sections BJ106.13.1 through BJ106.13.3 and Table BJ106.13(1).
    f. Wall bracing lengths are based on a soil site class “D.” Interpolation of bracing lengths between_Sds_ values associated with the seismic design categories is allowable where a
    site-specific_Sds_ value is determined in accordance with Section 1613.2 of the_California Building Code_.
    g. Where using wall Type A3, the minimum total length of braced wall panels in this column shall be multiplied by 1.25.|For SI: 1 inch = 25.4 mm, 1 foot = 305 mm, 1 pound per square foot = 0.0479 kPa.
    a. Linear interpolation shall be permitted.
    b. Braced wall panels shall be without openings and shall have an aspect ratio (H:L) ≤ 2:1.
    c. Tabulated minimum total lengths are for braced wall lines using single braced wall panels with an aspect ratio (H:L) ≤ 2:1, or using multiple braced wall panels with aspect
    ratios (H:L) ≤ 1:1. For braced wall lines using two or more braced wall panels with an aspect ratio (H:L) > 1:1, the minimum total length shall be multiplied by the largest
    aspect ratio (H:L) of braced wall panels in that line.
    d. Subject to applicable seismic adjustment factors associated with “All methods” in Table R602.10.3(4), except “Wall dead load.”
    e. Strawbale braced wall panel types indicated shall comply with Sections BJ106.13.1 through BJ106.13.3 and Table BJ106.13(1).
    f. Wall bracing lengths are based on a soil site class “D.” Interpolation of bracing lengths between_Sds_ values associated with the seismic design categories is allowable where a
    site-specific_Sds_ value is determined in accordance with Section 1613.2 of the_California Building Code_.
    g. Where using wall Type A3, the minimum total length of braced wall panels in this column shall be multiplied by 1.25.|For SI: 1 inch = 25.4 mm, 1 foot = 305 mm, 1 pound per square foot = 0.0479 kPa.
    a. Linear interpolation shall be permitted.
    b. Braced wall panels shall be without openings and shall have an aspect ratio (H:L) ≤ 2:1.
    c. Tabulated minimum total lengths are for braced wall lines using single braced wall panels with an aspect ratio (H:L) ≤ 2:1, or using multiple braced wall panels with aspect
    ratios (H:L) ≤ 1:1. For braced wall lines using two or more braced wall panels with an aspect ratio (H:L) > 1:1, the minimum total length shall be multiplied by the largest
    aspect ratio (H:L) of braced wall panels in that line.
    d. Subject to applicable seismic adjustment factors associated with “All methods” in Table R602.10.3(4), except “Wall dead load.”
    e. Strawbale braced wall panel types indicated shall comply with Sections BJ106.13.1 through BJ106.13.3 and Table BJ106.13(1).
    f.

  • CRC § 10.3 High relevance — show source text

    Subject to applicable seismic adjustment factors associated with Item 5 in Table R602.10.3(4).
    e. Cob braced wall panel types indicated shall comply with Section BK106.11 and Table BK106.11(1).
    f. Wall bracing lengths are based on a soil site class D. Interpolation of bracing lengths between_SDS_ values associated with the seismic design categories is allowable where a
    site-specific_SDS_ value is determined in accordance with Section 1613 of the_California Building Code_.
    g. For total plaster thickness between 3 inches and 6 inches, the minimum total length of braced wall panels shall be multiplied by 1.2.|For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square foot = 0.0479 kPa.
    a. Interpolation is not permitted.
    b. Braced wall panels shall be without openings.
    c. Braced wall panel Types A, B and E shall have an aspect ratio (H:L) ≤ 1:1. Braced wall panelTypes C and D shall have an aspect ratio (H:L) ≤ 2:1.
    d. Subject to applicable seismic adjustment factors associated with Item 5 in Table R602.10.3(4).
    e. Cob braced wall panel types indicated shall comply with Section BK106.11 and Table BK106.11(1).
    f. Wall bracing lengths are based on a soil site class D. Interpolation of bracing lengths between_SDS_ values associated with the seismic design categories is allowable where a
    site-specific_SDS_ value is determined in accordance with Section 1613 of the_California Building Code_.
    g. For total plaster thickness between 3 inches and 6 inches, the minimum total length of braced wall panels shall be multiplied by 1.2.|For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square foot = 0.0479 kPa.
    a. Interpolation is not permitted.
    b. Braced wall panels shall be without openings.
    c. Braced wall panel Types A, B and E shall have an aspect ratio (H:L) ≤ 1:1. Braced wall panelTypes C and D shall have an aspect ratio (H:L) ≤ 2:1.
    d. Subject to applicable seismic adjustment factors associated with Item 5 in Table R602.10.3(4).
    e. Cob braced wall panel types indicated shall comply with Section BK106.11 and Table BK106.11(1).
    f. Wall bracing lengths are based on a soil site class D. Interpolation of bracing lengths between_SDS_ values associated with the seismic design categories is allowable where a
    site-specific_SDS_ value is determined in accordance with Section 1613 of the_California Building Code_.
    g. For total plaster thickness between 3 inches and 6 inches, the minimum total length of braced wall panels shall be multiplied by 1.2.|For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square foot = 0.0479 kPa.
    a. Interpolation is not permitted.
    b. Braced wall panels shall be without openings.
    c. Braced wall panel Types A, B and E shall have an aspect ratio (H:L) ≤ 1:1.

Frequently asked questions

What is the single quickest check to see if a braced wall line is acceptable?

Confirm (1) each braced wall panel edge is ≤ 10 ft from the braced wall line end and (2) the total installed braced panel length meets the amount taken from Table R602.10.3 (after applying adjustment factors). § R602.10.2 and § R602.10.3.

Can I mix intermittent and continuous methods along the same braced wall line?

Mixing is allowed only under the conditions in § R602.10.4.1. When mixing, required lengths for intermittent methods are determined using the highest intermittent‑method value and adjustments as specified.

Do I always have to put gypsum board on the interior side opposite a braced panel?

Gypsum is normally required; exceptions and substitution allowances are listed in § R602.10.4.3 and the notes to the bracing tables. If gypsum is omitted for permitted exceptions, required lengths must be adjusted per the table notes.

Where are the actual linear‑foot numbers for each method?

The base numeric lengths are in Table R602.10.3(1) and Table R602.10.3(3); read the entry for your method, SDC and braced‑wall‑line condition, then apply factors from Table R602.10.3(2) and Table R602.10.3(4) as required. § R602.10.3.

Are some methods prohibited in high seismic areas?

Yes — certain methods are limited or prohibited in SDC C/D0/D1/D2 by the method notes and table footnotes (see Table R602.10.4 notes). Always check the method footnotes for SDC restrictions.

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California Residential Code