In typical deck constructionwith a ledger on one side of the joist and beam on the other the size of the joists is driven by the size of the deck based on the general maximum spans mentioned above.
Floor Joist Spans For Decks Joist Spacing Part Joist Spacing If you are designing a deckone of the calculations that you need is the size of the lumber required to span the distances between the deck supports or deck supports and wall.
Then you ll need to know how to compute the spansFind tips and information on lumber typesdecking standard lengths and moreIf you use decking joists
Noggins are required where joists span continuously over internal beam supportsNote These span tables have been prepared to assist in the PRELIMINARY design of timber deck structureseg for species selection and initial member sizing.
Prescriptive Residential Exterior Wood Deck Span Guide Revision Tables are not valid if joists span continuously over more than two supportsEngineering
Your selection of decking material will determine the maximum spacing of your joistsSome species of wood are stronger than others so refer to the Decking Span Table below before going to the Deck Joist Span Table .
The span table used in our area for is the UBC code (left) for the minimum size of joists for decksThese joist spans tables don t take into account the wet conditionsThe IRC deck joist span table
Beams are the horizontal boards that support the joists thereforethe length or span that the beam can safely hold the weight of the joists is extremely important to the overall integrity of the deck.
Joist span table Use these tables to determine floor joist spans based on grade of lumbersize of joist floor joist spacing and a live load of lbs ft or lbs ft These tables can also be used to determine deck joist span.
Maximum Joist Spacing for Decks Joist Span Existing Floor Joist Existing Band Joist Joist Ledger Board Rim Joist Beam Manufactured connector installed
I m building a ground level deck with x joists supported by adjustable post bases(Bison s)I can t use a thicker joist because of door threshold clearanceThe AMC span table table gives me about a foot span for a x (depending on species live load numbers)Honestly that sounds
Deck beam span table Deck joist span table Deck joist rule of thumb Deck Porch Construction Structural Fasteners Deck Porch Post Beam Connectors steel post cap connectorsplywood post to beam cleats other connectors Deck Porch Railings Code Requirements Safety Deck framing tables codes specifications Questions answers about allowable spans for deck floor or porch framing.
Obviously if youre a piano collector or plan to crowd as many people as possible onto your deckyou should err on the side of caution and increase the size of the floor joists or reduce the spanJoist Span
RESIDENTIAL DECKS INFORMATION SHEET Joist Span Sample Calculations for Using Joist Span and Beam Size length of a and the size of the joistsExample a