2×4 Wood Span Tables

You can also use the Wood Beam Calculator from the American Wood Council website to determine maximum rafter and joist lengths. Span Calculator for Wood Joists and Rafters also available for the Android OS.

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925 960-4410 Permit Center 1052 South Liv ermore Avenue fax.

2×4 wood span tables. Where the roof span exceeds 32 feet the wall studs shall be increased to 2×6 or the studs shall be designed in accordance with accepted engineering practice. Also available for the Android OS. Limited to span in inches divided by 360.

Table 91 in Span Tables for Joists and Rafters Figure 5 gives a required compression value of 237 psi for a span of 16 feet and bearing length of 15 inches. Span Tables for Domestic Floor Joists to BS 5268-71 Note. Maximum spans are inside to inside of bearings Lumber Span Tables for Spruce-Pine-Fir South SPFs.

Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters. Deflection – For 30 psf live load. Table 91 in Span Tables for Joists and Rafters Figure 5 gives a required compression value of 237 psi for a span of 16 feet and bearing length of 15 inches.

The maximum spans in the tables are shown up to 40 ft which is assumed to be the practical maximum span for residential roof trusses. OR Download PDF for Free 2005 Span Tables for Joists and Rafters 47 pages 331 KB PDF. The tables permit a bearing length of up to 35 inches but since 15 is probably the worst case that youll encounter for joist or rafter bearing its a safe value.

Our floor joist span tables are based on loadings given in the newer amended version of BS 6399-1. Community Development Department phone. Span Tables for Douglas Fir-Larch Lumber.

Strength – Live load of 30 psf plus dead load of 10 psf determines the required bending design value. How do you build a 2×4 truss. The tables permit a bearing length of up to 35 inches but since 15 is probably the worst case that youll encounter for joist or rafter bearing its a safe value.

Beam and Joist Span Tables Built-Up Wood Floor Beams Supporting One Floor in a House Maximum Spans for Uniformly Distributed Loads Species and Grade Supported Built Up Beam Size Joist Length 3-2X8 4-2X8 3-2X10 4-2X10 3-2X12 4-2X12 8 9-8 11-2 11-10 13-8 13-8 15-10 10 8-8 10-0 10-7 12-2 12-3 14-2. Deflection is limited to the span in inches divided by 240 for live load only. Roof Truss Span Tables Alpine Engineered Products 15 Top Chord 2×4 2×6 2×6 2×4 2×6 2×6 2×4 2×6 2×6 2×4 2×6 2×6 Bottom Chord 2×4 2×4 2×6 2×4 2×4 2×6 2×4 2×4 2×6 2×4 2×4 2×6 212 24 24 33 27 27 37 31 31 43 33 33 46 2512 29 29 39 33 33 45 37 38 52 39 40 55 312 34 34 46 37 39 53 40 44 60 43 46 64 3512 39 39 53 41 44 61 44 50 65 47 52 70.

Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. Span Tables for Jois ts and Rafters American Wood Council 4 Span Tables for Joists and Rafters American Wood Council DESIGN CRITERIA. This means that some values are slightly more conservative than span tables from other sources if those do not include the amended guidance.

View Joist Rafter Tables. 2×12 2×6 2×8 2×10 2×12 Note. How to Build a Wood Floor Truss Lay the two pieces of 2-by-4-by-144-inch lumber on a worktable.

A habitable attic assembly supported by 2×4 studs is limited to a roof span of 32 feet. Pricing for Span Tables and Design Values for Joists and Rafters 2005 Combo Non-member 1400 MemberStudent 1200 Qualified students are those who are full-time students enrolled in a wood design course at a university or college. Simplified maximum span tables for selected visual and mechanical grades of Southern Pine lumber in sizes 24 thru 212.

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