Joist Spans
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Southern Pine 3-2X10
3-2X12 10'-6"
Douglas Fir-Larch, Hem-Fir, Spruce-Pine-Fir, Redwood, Cedars, Ponderosa Pine, Red Pine 3X6 OR 2-2X6
3X8 OR 2-2X8 4'-7"
What wood is used for structural beams?
Douglas Fir, Ponderosa Pine, White Fir and Western Red Cedar are the most common single species sold as dimension lumber products. Structural lumber (including dimension lumber) is visually and/or mechanically (MSR) graded for its strength and physical working properties (appearance is secondary, unless specified).
The average cost of basic pressure treated pine runs about $15-$25 per square foot. Fancier woods will cost a bit more, usually between $25-$30 per square foot.
Is untreated lumber expensive?
An obvious advantage of untreated lumber is its price; it's much cheaper than treated lumber. Since CCA-treated lumber was taken off the market, new treatment techniques use high levels of copper, which is more expensive.Mar 5, 2009
How far can a wood beam span without support?
A 2×10 beam – made up of two 2x10s nailed together – can span up to 11' without support beneath a deck that is 4' wide. For a more normal-sized deck, the same beam can span 8', supporting a deck that is 8' wide.
How long can a wooden beam span?
2-grade 2×6 joists can span up to 10 feet 9 inches from beam to beam when spaced the standard 16 inches apart with a maximum live load of 30 inches per square foot.
How big of a beam do I need to span 20 feet?
Wood beam size for a 20 foot span:- as per general thumb rule, for a 20 foot span, size of wood beam or lumber joist should be 2×14 which placed at 16″ apart from centre used for residential building or projects or construction in which depth of section of beam is 350mm (14″) and width of beam is 50 mm or 2″.
How big of a beam do I need to span 24 feet?
Wood beam size for a 24 foot span:- as per general thumb rule, for a 24 foot span, size of wood beam or lumber joist should be 2×16 which placed at 16″ apart from centre used for residential building or projects or construction in which depth of section of beam is 400mm (16″) and width of beam is 50 mm or 2″.