3/16/2024 0 Comments Pole barn rafter span tables![]() ![]() TABLE 2304.8(2) SHEATHING LUMBER, MINIMUM GRADE REQUIREMENTS: BOARD GRADE SOLID FLOOR OR ROOF SHEATHING Floor or roof sheathing complying with this table shall be deemed to meet the design criteria of Section 2304.8.Installation details shall conform to Sections 2304.8.8.2 for floor and roof sheathing, respectively.MINIMUM NET THICKNESS (inches) OF LUMBER PLACED TABLE 2304.8(1) ALLOWABLE SPANS FOR LUMBER FLOOR AND ROOF SHEATHING a, b SPAN (inches) Structural floor sheathing and structural roof sheathing shall comply with Sections 2304.8.8.2, respectively. V asd shall be determined in accordance with Section 1609.3.1.Wall-16 and plywood siding 16 on center shall be used with studs spaced a maximum of 16 inches on center. Plywood siding rated 16 on center or 24 on center shall be permitted as an alternative to panels with a 24/16 span rating. 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.Lateral requirements shall be in accordance with Section 2305 or 2308. The table is based on wind pressures acting toward and away from building surfaces in accordance with Section 30.7 of ASCE 7.Three-ply plywood sheathing with studs spaced more than 16 inches on center shall be applied with panel strength axis perpendicular to supports. Panel strength axis shall be parallel or perpendicular to supports.MAXIMUM NOMINAL DESIGN WIND SPEED, V asd d (MPH)įor SI: 1 inch = 25.4 mm, 1 mile per hour = 0.447 m/s. ![]() MINIMUM WOOD STRUCTURAL PANEL SPAN RATING TABLE 2304.6.1 MAXIMUM NOMINAL DESIGN WIND SPEED, V asd PERMITTED FOR WOOD STRUCTURAL PANEL WALL SHEATHING USED TO RESIST WIND PRESSURES a, b, c MINIMUM NAIL 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 ( K z t) of 1.0. 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). ![]() ![]() 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.
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