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PRESOMPTIVE <br /> vati OECX,mn x., ..is.� <br /> Figure 12. Typical Footing Options. <br /> . <br /> Cut ends of posts <br /> posts must be shall be field treated <br /> centered on footing with an approved <br /> �_. preservative(such f„diameter <br /> as copper rod <br /> - pre-manufactured naphthenate) <br /> post base <br /> € with post anchor <br /> 12 <br /> about 1 .- _.., grade <br /> • <br /> 4 '4 _ � �� <br /> 51111i 4 <br /> 12"diameter <br /> 12" . cone.stem 4"min. <br /> mmn. 4 T •. <br /> dx ...... <br /> q <br /> 4 per k " <br /> B O: <br /> V ' a 4 A Table 4 4dNM Mt <br /> n <br /> frost depth a : 4" in. <br /> •- per Table 4 1- per Table 4 -o— -- per Table 4 <br /> per Table 4 <br /> footings must bear gravel -- <br /> on undisturbed soil <br /> LEDGER ATTACHMENT REQUIREMENTS such as oriented strand board(OSB)or structural <br /> JR507[ composite lumber(SCL) including laminated veneer <br /> GENERAL:Attach the ledger board,which shall be lumber(LVL)-as band joists(or rim joists)that can <br /> equal to or greater than the deck joist depth but less than support the attachment of a deck (see Figure 14). <br /> or equal to the house band or rim joist depth,to the However,some older homes might be constructed with <br /> house in accordance with Figures 14 and 15.The ledger band boards that are too thin(less than 1 )to support a <br /> shall be a minimum nominal 2x8. When attachments are deck. In such cases,a non-ledger deck or a full plan <br /> made to the house band joist,the band joist shall be submission is required. <br /> capable of supporting the new deck. If this cannot be MANUFACTURED WOOD TRUSS: A metal plate <br /> verified or conditions at the house differ from the details connected wood truss (MPCWT)is an engineered, <br /> herein,then either a non-ledger deck or full plan <br /> submission is required. See NON LEDGER DECKS. prefabricated structural component designed for each <br /> specific application. MPCWT's used in residential floors <br /> SIDING AND FLASHING: House siding or the are often installed with a 2x4 lumber"ribbon"at the <br /> exterior finish systemmust be removed prior to ends of the trusses(see Figure 13B) to tie the ends of the <br /> installation of the ledger board.•Approved corrosion trusses together.The ribbon board, by itself, is not. <br /> resistant flashing is required at any ledger board intended to support the deck ledger and deck. Installing <br /> connection to a wall of wood framed construction (see residential decks when the floor system for the house <br /> MINIMUM REQUIREMENTS). See Figure 14 for uses MPCWT requires a standard detail provided by the <br /> continuous flashing with drip edge.The threshold shall truss designer,a non ledger deck,or a full plan <br /> be carefully flashed and caulked to prevent water submission. Refer to the Technical Note-Attachment of <br /> intrusion due to splash fromthe deck or melting snow Residential Deck Ledger to Metal Plate Connected <br /> and ice. Wood Truss Floor System for special blocking details <br /> and attachment requirements(www.sbcindustry.com). <br /> MANUFACTURED WOOD I-JOIST: The term"I- <br /> Joist"denotes manufactured wood"I"joists(see Figure <br /> 13A). Many new homes constructed with wood I-joists <br /> include 1" or thicker engineered wood products(EWP)- <br /> °i f r <br /> American Wood Council <br />