Section 2322 High-Velocity Hurricane Zones—Sheathing
Plywood subflooring shall be continuous over two or more spans with face grain perpendicular to the supports. The allowable spans shall not exceed those set forth in Table 2322.1.6.
Plywood roof sheathing shall be rated for Exposure 1, and shall be designed in accordance with ASCE 7, to have a minimum nominal thickness of no less than 19/32 inch (15 mm) and shall be continuous over two or more spans with face grain perpendicular to supports. Roof sheathing panels shall be provided with a minimum of 2-inch by 4-inch (51 mm by 102 mm) edgewise blocking at all horizontal panel joints with edge spacing in accordance with manufacturer's specifications, for a distance at least 4 feet (1219 mm) from each gable end. The allowable spans shall not exceed those set forth in Table 2322.2.3.
Plywood, if protected with stucco, may serve for both sheathing and exterior cladding provided:
Where storm sheathing is provided in accordance with Section 2322.3, exterior cladding may be one of the following: