Except as provided for in Section 1405 for weatherboarding or where stucco construction that complies with Section 2510 is installed, enclosed buildings shall be sheathed with one of the materials of the nominal thickness specified in Table 2304.6 or any other approved material of equivalent strength or durability.
|SHEATHING TYPE||MINIMUM THICKNESS||MAXIMUM WALL |
|Wood boards||5/8 inch||24 inches on center|
|Fiberboard||1/2 inch||16 inches on center|
|Wood structural panel||In accordance with Tables 2308.9.3(2) and 2308.9.3(3)||—|
|M-S "Exterior Glue" and M-2 "Exterior Glue" Particleboard||In accordance with Section 2306.3 and Table 2308.9.3(4)||—|
|Gypsum sheathing||1/2 inch||16 inches on center|
|Gypsum wallboard||1/2 inch||24 inches on center|
|Reinforced cement mortar||1 inch||24 inches on center|
Where wood structural panel sheathing is used as the exposed finish on the outside of exterior walls, it shall have an exterior exposure durability classification. Where wood structural panel sheathing is used elsewhere, but not as the exposed finish, it shall be of a type manufactured with exterior glue (Exposure 1 or Exterior). Wood structural panel wall sheathing or siding used as structural sheathing shall be capable of resisting wind pressures in accordance with Section 1609. Maximum wind speeds for wood structural panel sheathing used to resist wind pressures shall be in accordance with Table 2304.6.1 for enclosed buildings with a mean roof height not greater than 30 feet (9144 mm) and a topographic factor (Kz t) of 1.0.
|PANEL NAIL |
|MAXIMUM NOMINAL |
DESIGN WIND SPEED,Vasdd(MPH)
|Wind exposure |
(2.0" × 0.113")
(2.5" × 0.131")
- Panel strength axis shall be parallel or perpendicular to supports. Three-ply plywood sheathing with studs spaced more than 16 inches on center shall be applied with panel strength axis perpendicular to supports.
- The table is based on wind pressures acting toward and away from building surfaces in accordance with Section 30.7 of ASCE 7. Lateral requirements shall be in accordance with Section 2305 or 2308.
- Wood structural panels with span ratings of wall-16 or wall-24 shall be permitted as an alternative to panels with a 24/0 span rating. Plywood siding rated 16 o.c. or 24 o.c. shall be permitted as an alternative to panels with a 24/16 span rating. Wall-16 and plywood siding 16 o.c. shall be used with studs spaced a maximum of 16 inches o.c.
- Vasd shall be determined in accordance with Section 1609.3.1.