(a)Use only deformed-shank nails for curved surfaces.

(b) Nail type, size and spacing may vary for diaphragm designs.

(c) All panels will support at least 30 psf live load plus 10 psf dead load at maximum span.

(d) For spans 48 inches or greater,space nails maximum 6 inches at all supports.

structural decks, 15/32 inch or thicker panels should be considered for best performance over uneven surfaces or when rain or highs humidity is anticipated prior to application of roof coating. Use corrosion-resistant fasteners sized and spaced as recommended in Table 8.

APA Panel Soffits

Recommended spans for open and closed APA panel soffits are given in Tables 30 and 31. The recommendations in Table 30 for open soffits also apply to combined or/ceiling construction. Panels are assumed continuous over two or more spans with the long dimension or strength axis across supports for both applications. For appearance purposes in open soffit construction, provide blocking, tongue-and-groove edges, or other suitable edge support. Panels with support at least 30 psf live load, plus 10 psf dead load.

For open soffit and nonstructural ceiling construction, panels designated Exposure 1 are recommended as a minimum (check local building code) where appearance is not a major consideration. Only Exterior panels should be used of closed soffits.

At eaves where Exposure 1 sheathing is used for roof decking, protect panel edges against direct exposure to the weather with fascia trim. Although unsounded and touch-sanded grades of plywood are often used for applications such as soffits, optimum appearance and finish performance is attained by using panels with textured or sanded A-grade faces. For panel grades other than APA RATED SIDING