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// CODE SNIPPET

2304.6 Exterior Wall Sheathing

2017 FBC - Building, 6th edition > 23 Wood > 2304 General Construction Requirements > 2304.6 Exterior Wall Sheathing
JUMP TO FULL CODE CHAPTER
Wall sheathing on the outside of exterior walls, including gables, and the connection of the sheathing to framing shall be designed in accordance with the general provisions of this code and shall be capable of resisting wind pressures in accordance with Section 1609.

2304.6.1 Wood Structural Panel Sheathing

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 sheathing, connections and framing spacing shall be in accordance with Table 2304.6.1 for the applicable wind speed and exposure category where used in enclosed buildings with a mean roof height not greater than 30 feet (9144 mm) and a topographic factor (Kz t) of 1.0.

TABLE 2304.6.1

MAXIMUM NOMINAL DESIGN WIND SPEED, Vasd PERMITTED FOR WOOD STRUCTURAL PANEL WALL SHEATHING USED TO RESIST WIND PRESSURESa, b, c

MINIMUM NAILMINIMUM
WOOD

STRUCTURAL

PANEL SPAN
RATING
MINIMUM
NOMINAL

PANEL
THICKNESS
(inches)
MAXIMUM
WALL STUD
SPACING
(inches)
PANEL NAIL
SPACING
MAXIMUM NOMINAL
DESIGN WIND SPEED, Vasd d (MPH)
SizePenetration
(inches)
Edges
(inches o.c.)
Field
(inches o.c.)
Wind exposure category
BCD
6d common
(2.0" × 0.113")
1.524/03/8166121109085
24/167/161661211010090
6150125110
8d common
(2.5" × 0.131")
1.7524/167/1616612130110105
6150125110
246121109085
61109085

For SI: 1 inch = 25.4 mm, 1 mile per hour = 0.447 m/s.

  1. 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.
  2. 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.
  3. 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 on center or 24 on center shall be permitted as an alternative to panels with a 24/16 span rating. Wall-16 and plywood siding 16 on center shall be used with studs spaced a maximum of 16 inches on center.
  4. Vasd shall be determined in accordance with Section 1609.3.1.

Related Code Sections


2304.6 Wood, Exterior Wall Sheathing
Wall sheathing on the outside of exterior walls, including gables, and the connection of the sheathing to framing shall be designed in accordance ...
2017 FBC - Building, 6th edition > 23 Wood > 2304 General Construction Requirements > 2304.6 Exterior Wall Sheathing
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2020 FBC - Building, 7th edition > 23 Wood > 2304 General Construction Requirements > 2304.6 Exterior Wall Sheathing
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2017 FBC - Building, 6th edition > 23 Wood > 2308 Conventional Light-Frame Construction > 2308.5 Wall Construction > 2308.5.11 Exterior Wall Sheathing
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to the attic space at a gable or kneewall, the provisions of Section R316.5.3 shall apply. Where foam plastic insulation is used as exterior wall sheathing ...
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