NOTE: This treatment is normally dyed blue for identification purposes however for roof decking applications we have them treat it without the dye so it remains clear. NOTE: This treatment is for interior use only. Solid Decking tables, technical data, and installation * *Note: KDAT lumber tends to have more surface checks than normal. ![]() Always consult local building codes and/or an engineer to ensure that the decking you are using is the correct thickness for your project. These differ from area to area and are governed by established building codes. *Note: Span capabilities are affected by several factors such as roof slope, wind loads, and snow loads. A dditional charge for this dense 2×6 Southern Pine decking is around $1 per sq ft. It a lso meets the requirements for “Dense Standard Decking” as defined in the SPIB (Southern Pine Inspection Bureau) grading rule book, and costs significantly less then 2×6 laminated that is sometimes specified to meet these strength requirements. DENSE MACHINE STRESS RATEDĭense Machine Stress Rated Southern Pine 2×6 Decking – This 2×6 decking boast s a 2.2 MOE (Modulus of Elasticity), a 2,700 Fiber Stress in Bending rating, and a #1 Select Face. A dditional charge for Cypress 2×6 Decking is around $7 per sq ft. It will have some splits and holes so expect to do some trimming. A dditional charge for Doug Fir 2×6 Decking is usually around $1.50 per sq ft.Ĭypress 2×6 Decking – This beautiful naturally rot resistant product is custom milled to order in a #2 common grade. Note: Southern Pine and Doug Fir have similar span capabilities. ![]() OTHER SPECIESĭoug Fir 2×6 Decking – Th is product comes #1 Select Face just like our Southern Pine. If you need it Prestained as well it will require TWO coats of water based (cannot use oil based) stain making the total ad a dditional charge for Fire Treating plus Prestaining around $3 per sq ft. A dditional charge is usually around $1 per sq ft. A dditional charge is usually around $ 1 per sq ft.įactory Fire Treating – we apply Flame Stop II Class A topical treatment. Proper joist sizing and spacing prevent problems and guarantee your floor will be strong, stable, and durable.OPTIONS FOR ORDERS LARGER THAN 5 ,000 SQ FTįactory Prestaining – we apply your choice of Sherwin Williams Oil-Based Superdeck Semi-Transparent stain colors or their clear sealer. Use the span table for safe spans under normal conditions. Joist spacing - Closer spacing shortens spans compared to wider spacing.įollow local building codes for minimum joist sizes and spans.Load – Heavier loads need shorter spans than lighter loads.Joist dimensions - Wider joists can span further than narrower ones.Wood species/grade - Denser woods like Southern pine allow longer spans than lighter types.So, How Do You Determine Proper Floor Joist Spans?Ĭalculate maximum spans between supports to prevent sagging, bouncing, and related issues. Foundation and Framing for Back Porch Addition (video).Err on the side of caution rather than trying to push the envelope. Spans for deck joists shall be at agreement with Indexes R502.3.1(1) and. Preserving treated gauge lumber shall be identified as required by. Listed are 46 tables based on common loading conditions for floor joists, roof joists the rafters. Don’t use smaller lumber, wider spacing, or longer spans. Simplified maximum span tables for selected optical and manual grades are Southern Pine shamble in sizes 2×4 thru 2×12. When in doubt, always use bigger lumber, closer spacing, or smaller spans. Consult an engineer for unusual situations or nonstandard floor plans.īelow is a table of minimum joist sizes for 16′′ and 24′′ on-center spacing using #2 lumber with 10 psf dead load and 40 psf live load. Increase joist size or reduce spans for heavy loads like pianos or crowded decks.Ĭonsidering all the factors, we can give the minimum joist sizes needed for various wood types, grades, sizes, spacing, and floor loads.Ĭheck local building codes before construction. ![]() It ranges from 30+ pounds per square foot, with 40 pounds typical for residential rooms and decks. Simplified maximum spans tables for selected optical the mechanical grades of Southern Jaw lumber in sizes 2×4 thru 2×12. The live load includes furnishings like bookshelves and beds, people, and other items that you may place on the floor. Calculate it by adding material weights and dividing by the square footage covered. The floor’s load also affects the joist size and span length you need.ĭead load is the weight of building materials (joists, subfloor, etc.) and is commonly 10 pounds per square foot. Doubling width increases span 80–100%, even with the same linear footage of lumber. Knots near edges should also face up so they compress rather than stress.Ī board’s width plays a much larger role than thickness in determining joist span distances.ĭoubling joist thickness or number increases span by about 25%. Position joists with any crook facing up so weight will straighten it. Best Lawn Care Service for Service Dogs.Lighted Magnifying Glass That Stays Put.
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