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MAXIMUM JOIST SPACING FOR DECKING <br /> MAXIMUM ON-CENTER JOIST SPACING <br /> DECKING MATERIAL TYPE AND NOMINAL SIZE <br /> Decking perpendicular to joist Decking diagonal to joists <br /> 11/4-inch-thick wood 16 inches 12 inches <br /> 2-inch-thick wood 24 inches 16 inches <br /> Plastic composite In accordance with Section R507.2 In accordance with Section R507.2 <br /> For SI: 1 inch=25.4 mm,1 foot=304.8 mm,1 degree=0.01745 rad. <br /> a.Maximum angle of 45 degrees from perpendicular for wood deck boards. <br /> R507.8 Vertical and Lateral Supports <br /> Where supported by attachment to an exterior wall,decks shall be positively anchored to the primary structure and designed for <br /> both vertical and lateral loads.Such attachment shall not be accomplished by the use of toenails or nails subject to withdrawal. <br /> For decks with cantilevered framing members,connection to exterior walls or other framing members shall be designed and <br /> constructed to resist uplift resulting from the full live load specified in Table R301.5 acting on the cantilevered portion of the deck. <br /> Where positive connection to the primary building structure cannot be verified during inspection,decks shall be self-supporting. <br /> R507.9 Vertical and Lateral Supports at Band Joist <br /> Vertical and lateral supports for decks shall comply with this section. <br /> R507.9.1 Vertical Supports <br /> Vertical loads shall be transferred to band joists with ledgers in accordance with this section. <br /> R507.9.1.1 Ledger Details <br /> Deck ledgers shall be a minimum 2-inch by 8-inch(51 mm by 203 mm)nominal,pressure-preservative-treated Southern <br /> pine,incised pressure-preservative-treated hem-fir,or approved,naturally durable,No.2 grade or better lumber.Deck <br /> ledgers shall not support concentrated loads from beams or girders.Deck ledgers shall not be supported on stone or <br /> masonry veneer. <br /> R507.9.1.2 Band Joist Details <br /> Band joists supporting a ledger shall be a minimum 2-inch-nominal(51 mm),solid-sawn,spruce-pine-fir or better lumber or a <br /> minimum 1-inch(25 mm)nominal engineered wood rim boards in accordance with Section R502.1.7.Band joists shall bear <br /> fully on the primary structure capable of supporting all required loads. <br /> R507.9.1.3 Ledger to Band Joist Details <br /> Fasteners used in deck ledger connections in accordance with Table R507.9.1.3(1)shall be hot-dipped galvanized or <br /> stainless steel and shall be installed in accordance with Table R507.9.1.3(2)and Figures R507.9.1.3(1)and R507.9.1.3(2). <br /> TABLE R507.9.1.3(1) <br /> DECK LEDGER CONNECTION TO BAND JOIST <br /> 1C� <br /> 1 <br />