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2 PRESCRIPTIVE RESIDENTIAL WOOD DECK CONSTRUCTION GUIDE <br /> CONTENTS <br /> MINIMUM REQUIREMENTS &LIMITATIONS 2 PROHIBITED LEDGER ATTACHMENTS 15 <br /> DECKING REQUIREMENTS 3 LEDGER BOARD FASTENERS 15 <br /> JOIST SIZE 3 NON-LEDGER DECKS-VERTICAL LOADS 17 <br /> BEAM SIZE&ASSEMBLY REQUIREMENTS 5 DECK LATERAL LOADS 17 <br /> DECK FRAMING PLAN • 8 GUARD REQUIREMENTS 19 <br /> JOIST-TO-BEAM CONNECTION 9 GUARD POST AITACHMENTS 19 <br /> JOIST HANGERS 9 STAIR REQUIREMENTS 20 <br /> POST REQUIREMENTS• 10 STAIR HANDRAIL REQUIREMENTS 22 <br /> RIM JOIST REQUIREMENTS 11 STAIR FOOTING REQUIREMENTS 22 <br /> FOOTINGS 11 STAIR LIGHTING REQUIREMENTS 22 <br /> LEDGER ATTACHMENT"REQUIREMENTS 13 FRAMING AT CHIMNEY OR BAY WINDOW 23 <br /> MINIMUM REQUIREMENTS &LIMITATIONS zinc-coated galvanized steel,stainless steel,silicon <br /> 1. This document applies to singlelevel residential bronze,or copper. Hot dipped galvanized <br /> wood decks that are attached to the house to resist fasteners shall meet the requirements of ARM <br /> lateral forces. [R507.2.3] 153, Standard Specification for Zinc Coating <br /> (Hot-Dip) on Iron and Steel hardware, Class D <br /> 2. Overall deck length shall be equal to or less than• for fasteners 3/8" diameter and smaller or Class C <br /> overall deck width. See DECK FRAMING PLAN for 3 <br /> for fasteners with diameters over 3/8". <br /> definition of deck length and width. <br /> • Fasteners other than nails and timber rivets shall <br /> 3. Minimum post size is 6x6 nominal and maximum post be permitted to be of mechanically deposited zinc- <br /> height shall be in accordance with Table 4. coated steel with coating weights in accordance <br /> 4. All lumber shall be identified by the grade mark of, with ASTM B 695, Class 55,minimum. <br /> or certificate of inspection issued by, an approved • All connectors(joist hangers,cast-in-place post <br /> lumber grading or inspection bureau or agency anchors,etc.)shall be galvanized or shall be <br /> (www.alsc.org). All lumber and glued laminated stainless steel. Hardware to be hot-dipped prior to <br /> timber shall be a naturally durable species(such as fabrication shall meet ASTM A 653, Standard <br /> Redwood or Western Cedars with 90 percent or Specification for Steel Sheet, Zinc-Coated <br /> more of the width of each side is heartwood); or be (Galvanized) or Zinc-Iron Alloy-Coated <br /> preservatively treated with an approved process in (Galvannealed) by the Hot-Dip Process, G-185 <br /> accordance with American Wood Protection coating. Hardware to be hot-dipped galvanized <br /> Association standards(Table 1) [R317 and R318]. after fabrication shall meet ASTMA 123, <br /> All lumber in contact with the ground shall be Specification for Zinc (Hot-Dip Galvanized) <br /> approved preservative treated wood suitable for Coatings on Iron and Steel Products. <br /> ground contact. [R317.1.2] All cuts shall be field <br /> treated with an approved preservative(such as • Fasteners and connectors exposed to salt water or <br /> copper naphthenate) [R402.1.2]. located within 300 feet of a salt water shoreline <br /> shall be stainless steel grade 304 or 316. <br /> 5. All nails shall meet the requirements of ASTM F <br /> 1667.Threaded nails as stated in this document ' Fasteners and connectors shall be of the same <br /> include helical(spiral)and annular(ring-shank) corrosion-resistant material. <br /> nails. Wood screws shall meet the requirements of • Other coated or non-ferrous fasteners or hardware <br /> ANSI/ASME B18.6..1. Bolts and lag screws shall shallbe as approved by the authority having <br /> meet the requirements of ANSI/ASME 1318.2.1. jurisdiction. <br /> 6. Throughout this document,1" diameter bolts and 8. Decks supporting large concentrated loads such as <br /> lag screws are specified for various connections. hot tubs are beyond the scope of this document. <br /> Edge distance and spacing requirements are based 9.. This document does not apply to decks which will <br /> on1/2" diameter fasteners. If larger(or smaller) <br /> experience snow loads,snow drift loads, or sliding <br /> fasteners are specified,edge distance and spacing snow loads that exceed 40 psf. <br /> shall be adjusted. <br /> 10. Lateral load resistance is limited to the prescriptive <br /> 7. To resist corrosion, the following is required provisions of R507.2.3 of the IRC. Alternative loads <br /> [R317.3]: and detailing shall be approved by the authority <br /> ■ All screws,bolts,washers,nuts,and nails for use having jurisdiction. /0 SO <br /> with preservative treatedwood shall be hot-dipped <br /> American Wood Council <br /> Cl <br />