// CODE SNIPPET
2308.6.1 Braced Wall Lines
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For the purpose of determining the amount and location of bracing required along each story level of a building, braced wall lines shall be designated as straight lines through the building plan in both the longitudinal and transverse direction and placed in accordance with Table 2308.6.1 and Figure 2308.6.1. Braced wall line spacing shall not exceed the distance specified in Table 2308.6.1. In structures assigned to Seismic Design Category D or E, braced wall lines shall intersect perpendicularly to each other.
For SI: 1 foot = 304.8 mm.
FIGURE 2308.6.1
BASIC COMPONENTS OF THE LATERAL BRACING SYSTEM
TABLE 2308.6.1
WALL BRACING REQUIREMENTSa
| SEISMIC DESIGN CATEGORY | STORY CONDITION (SEE SECTION 2308.2) | MAXIMUM SPACING OF BRACED WALL LINES | BRACED PANEL LOCATION, SPACING (O.C.) AND MINIMUM PERCENTAGE (X) | MAXIMUM DISTANCE OF BRACED WALL PANELS FROM EACH END OF BRACED WALL LINE | ||
| Bracing methodb | ||||||
| LIB | DWB, WSP | SFB, PBS, PCP, HPS, GBc, d | ||||
| A and B |  |
35' - 0" | Each end and ≤ 25'- 0" o.c. | Each end and ≤ 25'- 0" o.c. | Each end and ≤ 25'- 0" o.c. | 12'- 6" |
 |
35'- 0" | Each end and ≤ 25'- 0" o.c. | Each end and ≤ 25'- 0" o.c. | Each end and ≤ 25'- 0" o.c. | 12'- 6" | |
 |
35'- 0" | NP | Each end and ≤ 25'- 0" o.c. | Each end and ≤ 25'- 0" o.c. | 12'- 6" | |
| C |  |
35'- 0" | NP | Each end and ≤ 25'- 0" o.c. | Each end and ≤ 25'- 0" o.c. | 12'- 6" |
 |
35'- 0" | NP | Each end and ≤ 25'- 0" o.c. (minimum 25% of wall length)e | Each end and ≤ 25'- 0" o.c. (minimum 25% of wall length)e | 12'- 6" | |
| D and E |  |
25'- 0" | NP | SDS < 0.50: Each end and ≤ 25'- 0" o.c. (minimum 21% of wall length)e | SDS < 0.50: Each end and ≤ 25'- 0" o.c. (minimum 43% of wall length)e | 8'- 0" |
| 0.5 ≤ SDS < 0.75: Each end and ≤ 25'- 0" o.c. (minimum 32% of wall length)e | 0.5 ≤ SDS < 0.75: Each end and ≤ 25'- 0" o.c. (minimum 59% of wall length)e | |||||
| 0.75 ≤ SDS ≤ 1.00: Each end and ≤ 25'- 0" o.c. (minimum 37% of wall length)e | 0.75 ≤ SDS ≤ 1.00: Each end and ≤ 25'- 0" o.c. (minimum 75% of wall length) | |||||
| SDS > 1.00: Each end and ≤ 25'- 0" o.c. (minimum 48% 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.
- This table specifies minimum requirements for braced wall panels along interior or exterior braced wall lines.
- See Section 2308.6.3 for full description of bracing methods.
- For Method GB, gypsum wallboard applied to framing supports that are spaced at 16 inches on center.
- The required lengths shall be doubled for gypsum board applied to only one face of a braced wall panel.
- Percentage shown represents the minimum amount of bracing required along the building length (or wall length if the structure has an irregular shape).
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