Deck Joist Spacing Joist Spacing (o.c.) 12″ Species Size Allowable Span Southern Pine 2×6 9′-11″ 2×8 13′-1″ 2×10 16′-2″ Click to see full answer. Accordingly, what is the maximum span for a 2×6 Rafter? Max. Live Load 20 lbs/ft2 (956 N/m2) Maximum Span (ft – in) Nominal Size (inches) Rafter Spacing, Center to Center (inches) Lumber Grade 2 x 6 12 16′ – 4” 16 14′ – 11” 24 13′ how far can 2×6 decking span? Decking boards span from joist to joist. If you use 5/4 decking, joists must be no farther apart than 16 inches. Decking made of 2x4s or 2x6s can span up to 24 inches. Likewise, people ask, how far can a double 2×6 span without support? When supporting joists that span 12 feet with no overhang beyond the beam, a double ply beam can span in feet a value equal to its depth in inches. A double 2×12 beam can span 12 feet; a (2) 2×10 can span 10 feet and so on.How far can a 4×6 span without support?Obviously, the larger the beam, the greater the distance it can span between posts. A Redwood 4×6 beam should span no more than 6′ between supporting posts.
