[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-1-en-105":3,"doc-seo-565105-105":53,"doc-detail-565105-en":127},{"code":4,"msg":5,"data":6},0,"success",[7,14,19,24,29,34,39,44,49],{"id":8,"doc_module":9,"doc_module_name":10,"category_name":11,"show_sort_weight":12,"slug":13},11,1,"Template","Presentations",90,"presentations",{"id":15,"doc_module":9,"doc_module_name":10,"category_name":16,"show_sort_weight":17,"slug":18},12,"Resumes",80,"resumes",{"id":20,"doc_module":9,"doc_module_name":10,"category_name":21,"show_sort_weight":22,"slug":23},14,"Invoices",70,"invoices",{"id":25,"doc_module":9,"doc_module_name":10,"category_name":26,"show_sort_weight":27,"slug":28},15,"Posters",60,"posters",{"id":30,"doc_module":9,"doc_module_name":10,"category_name":31,"show_sort_weight":32,"slug":33},16,"Social Media",50,"social-media",{"id":35,"doc_module":9,"doc_module_name":10,"category_name":36,"show_sort_weight":37,"slug":38},17,"Forms",40,"forms",{"id":40,"doc_module":9,"doc_module_name":10,"category_name":41,"show_sort_weight":42,"slug":43},18,"Letters",30,"letters",{"id":45,"doc_module":9,"doc_module_name":10,"category_name":46,"show_sort_weight":47,"slug":48},21,"Paper Templates",5,"papers-templates",{"id":50,"doc_module":9,"doc_module_name":10,"category_name":51,"show_sort_weight":4,"slug":52},158,"General","general-158",{"code":4,"msg":54,"data":55},"ok",{"site_id":56,"language":57,"slug":58,"title":59,"keywords":60,"description":61,"schema_data":62,"social_meta":120,"head_meta":122,"extra_data":124,"updated_unix":126},105,"en","deck-construction-maximum-joist-and-beam-spans","Deck Construction - Maximum Joist and Beam Spans","","Deck construction guidance focused on structural sizing limits, specifying maximum joist spacing and allowable spans for Southern Pine decking. Provides maximum perpendicular and diagonal joist spacing for different decking thicknesses and materials, plus joist spans with and without cantilever. Includes beam maximum spans with cantilever assumptions, then explains how to use the span tables by selecting decking thickness, joist orientation, cantilever choice, and beam lumber size. Adds deck terminology and detailed requirements for post height, embedment, beam bearing, joist hangers, decking attachment, ledger connections, and fastener placement spacing.",{"@graph":63,"@context":119},[64,80,102],{"@type":65,"itemListElement":66},"BreadcrumbList",[67,71,74,77],{"item":68,"name":69,"@type":70,"position":9},"https://docshare.wps.com","Home","ListItem",{"item":72,"name":10,"@type":70,"position":73},"https://docshare.wps.com/template/",2,{"item":75,"name":11,"@type":70,"position":76},"https://docshare.wps.com/template/presentations/",3,{"item":78,"name":59,"@type":70,"position":79},"https://docshare.wps.com/template/deck-construction-maximum-joist-and-beam-spans/565105/",4,{"url":78,"name":59,"@type":81,"image":82,"author":87,"headline":59,"publisher":90,"fileFormat":93,"inLanguage":57,"description":61,"dateModified":94,"datePublished":95,"encodingFormat":93,"isAccessibleForFree":96,"interactionStatistic":97},"DigitalDocument",{"url":83,"@type":84,"width":85,"height":86},"https://docshare.wps.com/thumbnails/deck-construction-maximum-joist-and-beam-spans/565105.png","ImageObject",442,249,{"name":88,"@type":89},"วิน","Person",{"url":68,"name":91,"@type":92},"DocShare","Organization","application/pdf","2026-10-25","2026-10-12",true,{"@type":98,"interactionType":99,"userInteractionCount":101},"InteractionCounter",{"@type":100},"ViewAction",7,{"@type":103,"mainEntity":104},"FAQPage",[105,111,115],{"name":106,"@type":107,"acceptedAnswer":108},"How do you determine joist spacing using the span tables?","Question",{"text":109,"@type":110},"Identify the decking board thickness and whether it runs perpendicular to or at a diagonal angle to the joists, then match the joist spacing from Table 1:1. Next choose whether the joists cantilever and use the lumber size plus spacing to verify the allowable maximum joist span in Table 1:2 or Table 1:3.","Answer",{"name":112,"@type":107,"acceptedAnswer":113},"What is the allowed cantilever for Southern Pine deck joists and beams?",{"text":114,"@type":110},"Joists may cantilever up to 1/4 of the actual adjacent span, and beams may cantilever at each end up to 1/4 of the actual beam span. An example in the tables shows how this increases the total maximum length for the stated joist or beam span.",{"name":116,"@type":107,"acceptedAnswer":117},"What are key requirements for deck posts and ledger connections?",{"text":118,"@type":110},"The guidance specifies deck post maximum heights measured to the underside of the beam, minimum post embedment in concrete (12 inches), minimum bearing for beam ends, and that ledger connections follow connector requirements and fastener rules. It also states stainless steel or hot-dipped galvanized for lag screws, bolts, and washers, and provides minimum end, edge, and row spacing distances for fasteners.","https://schema.org",{"og:url":78,"og:type":121,"og:title":59,"og:site_name":91,"og:description":61},"article",{"robots":123,"canonical":78},"index,follow",{"doc_id":125,"site_id":56},565105,1792314278,{"code":4,"msg":5,"data":128},{"doc_id":125,"user_id":129,"nickname":88,"user_avatar":130,"doc_module":9,"category_id":8,"category_name":11,"doc_title":59,"doc_description":61,"doc_content":131,"file_id":132,"file_url":133,"file_type":134,"file_size":135,"view_count":101,"is_deleted":4,"is_public":9,"is_downloadable":9,"audit_status":9,"page_count":47,"language":136,"language_code":57,"site_id":56,"html_lang":57,"table_of_contents":137,"faqs":138,"seo_title":139,"seo_description":61,"update_tm":140,"read_time":73},2336475104736,"https://ap-avatar.wpscdn.com/avatar/22000c4c5e0e5b17e70?x-image-process=image/resize,m_fixed,w_180,h_180&k=1786591360781797222","Maximum Joist Spacing for Decks  \nTable 1:1  \n\n| Decking Type | Perpendicular to Joist | Diagonal to Joist\u003Cbr>(Maximum angle of 45° from perpendicular) |\n| --- | --- | --- |\n| Wood-1 ¼” Thick | 16” OC | 12” OC |\n| Wood-2” Thick | 24” OC | 16” OC |\n| Plastic Composite | In Compliance with ASTM D 7032 As Per Manufacturer Specifications | In Compliance with ASTM D 7032 As Per Manufacturer Specifications |\n\nSouthern Pine Deck Joist Maximum Spans  \nTable 1:2  \nNo Cantilever  \nTable 1:3  \nWith Cantilever*  \n\n| Lumber\u003Cbr>Size | Joist\u003Cbr>Spacing-\u003Cbr>12” OC | Joist\u003Cbr>Spacing-\u003Cbr>16” OC | Joist\u003Cbr>Spacing-\u003Cbr>24” OC |\n| --- | --- | --- | --- |\n| 2 X 6 | 9’11” | 9’ | 7’ 7” |\n| 2 X 8 | 13’1” | 11’ 10” | 9’ 8” |\n| 2 X 10 | 16’ 2” | 14’ | 11’5” |\n| 2 X 12 | 18’ | 16’6” | 13’6” |\n\n\n| Lumber\u003Cbr>Size | Joist\u003Cbr>Spacing-\u003Cbr>12” OC | Joist\u003Cbr>Spacing-\u003Cbr>16” OC | Joist\u003Cbr>Spacing-\u003Cbr>24” OC |\n| --- | --- | --- | --- |\n| 2 X 6 | 6’8” | 6’8” | 6’8” |\n| 2 X 8 | 10’1” | 10’ 1” | 9’ 8” |\n| 2 X 10 | 14’ 6” | 14’ | 11’5” |\n| 2 X 12 | 18’ | 16’6” | 13’6” |\n\n*Joists may cantilever up to ¼ of the actual adjacent span. For example, a 2 x 12 joist placed 16” OC. spanning 16’-6” between supports may cantilever up to an additional 4’-1 ½” for a total maximum length of 20’ -7 ½”  \nSouthern Pine Deck  \nBeam Maximum Spans *  \nTable 1:4  \n\n| Lumber\u003Cbr>Size | Total Deck Joist Span (including cantilever)\u003Cbr>(Less than or equal to) |  |  |  |  |  |  |\n| --- | --- | --- | --- | --- | --- | --- | --- |\n| 2-2 X 6 | 6’ | 8’ | 10’ | 12’ | 14’ | 16’ | 18’ |\n|  | 6’11” | 5’11” | 5’4” | 4’10” | 4’6” | 4’3” | 4’ |\n| 2-2 X 8 | 8’9” | 7’7” | 6’9” | 6’2” | 5’9” | 5’4” | 5’ |\n| 2-2 X 10 | 10’4” | 9’ | 8’ | 7’4” | 6’9” | 6’4” | 6’ |\n| 2-2 X 12 | 12’2” | 10’7” | 9’5” | 8’7” | 8’ | 7’6” | 7’ |\n| 3-2 X 6 | 8’2” | 7’5” | 6’8” | 6’1” | 5’8” | 5’3” | 5’ |\n| 3-2 X 8 | 10’10” | 9’6” | 8’6” | 7’9” | 7’2” | 6’8” | 6’4” |\n| 3-2 X 10 | 13’ | 11’3” | 10’ | 9’2” | 8’6” | 7’11” | 7’6” |\n| 3-2 X 12 | 15’3” | 13’3” | 11’10” | 10’9” | 10’ | 9’4” | 8’10” |\n\n*Beams may cantilever at each end up to ¼ of the of the actual beam span. For example, a 16’ beam span can cantilever a maximum of 4’.  \nHOW TO USE THE SPAN TABLES ON PREVIOUS PAGE  \n1. Determine the decking board thickness and direction to determine joist spacing. (Table 1:1)  \n2. Decide whether the joists will cantilever over or not. Then using the lumber size of joists and the joist spacing, determine if you are within the maximum allowable joist span. (Table 1:2 or Table 1:3)  \n3. Using the beam span table, select your beam lumber size. Where it intersects with the deck joist span provides you with the maximum spacing between your posts.(Table 1:4)  \nDeck Terminology  \nDeck w/Dropped Beam Deck w/Flush Beam  \nRim Joist  \nDecking  \n\n| |  Existing Building \u003Cbr>Existing Band Joist | |\n| --- | --- | --- |\n\nDecking  \nDeck Posts Maximum Height  \n4 X 4 or 4 X 6 Post-8’ High-measured to the underside of the beam  \n6 X 6 Post-14’ High-measured to the underside of the beam  \nDeck Post to Deck Footing Requirements  \nManufactured connector installed  as per manufactured specifications  \nA minimum of 12” of post must be embedded in the concrete  \n\n|  |  |  |  |  |  |  |  |  |  |  |  |  |  |\n| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |\n|  | |  |  | |  |  | |  |  | |  |  |  |\n\n40” below grade to the bottom of the pier  \nDeck Post to Deck Beam Requirements  \nBeam  \nPost  \nDeck  \nPost Cap  \nPost Cap Requirements  \n(2) ½” diameter  \n2 ½”min.  \nNotched Post to Beam Requirements  \nDeck Beam Requirements  \nThe end of each beam  \nshall have a minimum  \nof 1 ½” of bearing on  \nwood or metal or   \n3“on masonry   \nSplices required to be  located at interior posts   \nLedger Board  \nDeck Joist Requirements  \nJoist Depth    \nJoist Hanger-Required Beam  \n(Minimum of 60% of  \njoist depth)  \nBlocking or approved lateral restraint (Minimum of 60% of joist depth) Rim  \n(3) 10d nails or  \n(3) No. 10 X 3 wood screws into end of joist  ","cbCaipAuf5vVGlLB","https://ap.wps.com/l/cbCaipAuf5vVGlLB","pdf",402144,"English","# Maximum Joist Spacing for Decks\n## Southern Pine Deck Joist Maximum Spans\n## Southern Pine Deck Beam Maximum Spans\n## How to Use the Span Tables\n## Deck Terminology and Components\n## Deck Posts Maximum Height and Requirements\n## Deck Beam and Joist Requirements\n## Deck Flooring and Ledger Connection Requirements","[{\"question\":\"How do you determine joist spacing using the span tables?\",\"answer\":\"Identify the decking board thickness and whether it runs perpendicular to or at a diagonal angle to the joists, then match the joist spacing from Table 1:1. Next choose whether the joists cantilever and use the lumber size plus spacing to verify the allowable maximum joist span in Table 1:2 or Table 1:3.\"},{\"question\":\"What is the allowed cantilever for Southern Pine deck joists and beams?\",\"answer\":\"Joists may cantilever up to 1/4 of the actual adjacent span, and beams may cantilever at each end up to 1/4 of the actual beam span. An example in the tables shows how this increases the total maximum length for the stated joist or beam span.\"},{\"question\":\"What are key requirements for deck posts and ledger connections?\",\"answer\":\"The guidance specifies deck post maximum heights measured to the underside of the beam, minimum post embedment in concrete (12 inches), minimum bearing for beam ends, and that ledger connections follow connector requirements and fastener rules. It also states stainless steel or hot-dipped galvanized for lag screws, bolts, and washers, and provides minimum end, edge, and row spacing distances for fasteners.\"}]","Deck Construction - Maximum Joist and Beam Spans | PDF",1791846645]