This ceiling joist span table is based on the 2012 IRC for uninhabitable attics with limited storage. Spans for ceiling joists shall be in accordance with Tables R8024 1 and R8024 2.
Of bearings and is based on uniformly loaded joists.
Wood ceiling joist span table. Limited to span in inches divided by 360. Span Tables for Jois ts and Rafters American Wood Council 4 Span Tables for Joists and Rafters American Wood Council DESIGN CRITERIA. These spans were calculated using our ceiling joist calculation engine.
Joists Rafters Simplified maximum span tables for selected visual and mechanical grades of Southern Pine lumber in sizes 24 thru 212. Engineered Wood Products EWP Span and Size Charts for BCI Joists. Span Tables F7 Rafters A maximum roof pitch of 25 degrees is assumed.
For example the highlighted cell below shows that a 2 x 6 Southern Yellow Pine joist with a grade of 2 and spaced 24 apart can have a maximum span of 10 feet – 0 inches 10-0 if you are designing your structure to support a plaster ceiling. For other grades and species and for other loading conditions refer to the AWC STJR. The spans are based on simple-span joists.
These span tables are the equivalent of other industry-standard span tables and are calculated to the same standards. Span Calculator for Wood Joists and Rafters also available for the Android OS. The maximum span is measured oc.
Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters. It covers 2 common lumber species and sizes at 20 pounds per square foot load. TECHNICAL DIAGRAM ON PAGE 35 30mm M.
Click on a span to generate a full calculation you can adjust the exact span. The spans for joists according to the code is far more than we find acceptable. You can also use the Wood Beam Calculator from the American Wood Council website to determine maximum rafter and joist lengths.
Strength – Live load of 30 psf plus dead load of 10 psf determines the required bending design value. This span table is to the format and methodology given in BS 5268-73. There are six choices.
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. App to quickly determine ALLOWABLE SPANS for wood rafters ceiling joists and floor joists — similar to the span tables of 20062009 International Building Code IBC. 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.
Fill any defects or nail holes with wood putty. We have engineered this calculator to provide spans which will produce a solid built house with no bounce in the floors or any swags in the ceiling. It covers 2 common lumber species and sizes at 20 pounds per square foot load.
BCI Joists are specially constructed I-joists with flanges made from strong VERSA-LAM laminated veneer lumber with oriented stranded board webs and approved waterproof structural adhesives providing outstanding strength and durability. Deflection – For 30 psf live load. Internal Floor Joists F7 42mm 30 Deck Joists F7 42mm 31 Deck Bearers F7 32.
The minimum bearing length is 1 ½ spans values in bold indicate that web stiffeners are required at the OSB end panel. Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. If this is the case with your structure use the Floor Joist Table to determine maximum joist lengthload.
TABLE R8024 1 CEILING JOIST SPANS FOR COMMON LUMBER SPECIES Uninhabitable attics without storage live load 10 psf LD 240 CEILING JOIST SPACING inches. Sand to an even finish and spot prime to all affected areas. Also available for the Android OS.