Continuous span beams are beams supported at three or more points along their length.
Timber roof beams span tables.
Single span beams are beams supported at two points only.
For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements.
Span tables allow users to choose an appropriate size and stress grade to achieve spanning needs.
View joist rafter tables.
Other more complex load condition spans can be determined with our free hyne timber design 7 5 software.
Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters.
Technical diagram on page 35 30mm m aximum allow able sp ans mm sheet roof spacing mm rafter size 600 760 900 1000 1200 66 x 30 850 750 700 700 600 90 x 30 1200 1050.
Tables providing size selections for various beam spans and loading combinations for southern pine dimension lumber and southern pine glued laminated timber are available for the following applications.
Table specifications are provided with each table indicating conditions and assumptions used to calculate the loads.
Span calculator for wood joists and rafters also available for the android os.
These tables are provided as a guideline.
Also available for the android os.
Aitc capacity tables provide the uniformly distributed load that a glued laminated timber beam can support based on beam size span and material properties.
View size selection tables.
Table 9 1 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 1 5 inches.
For the purpose of using these tables span may be interpreted as the clear distance between supports measured along the beam.
For simple construction such as domestic construction this can be determined from span table supplements in as1684 2 and as1684 3.
Span tables use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads.
Construction details should be in accordance with as1684 2.
Span tables f7 rafters a maximum roof pitch of 25 degrees is assumed.
The tables below give maximum spans for rafters and beams.
You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths.
The figures are based on quality materials.
The tables permit a bearing length of up to 3 5 inches but since 1 5 is probably the worst case that you ll encounter for joist or rafter bearing it s a safe value.
Window door garage door headers supporting roof wall floor loads.
In areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot.
View allowable load tables.
Window door garage door headers supporting roof loads only.
