You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths.
Timber framing hardwood span tables.
American wood council offers a range of span tables.
Joists crippled over supports shall be considered as single span joists.
Member tables for seasoned timber stress grade f17 seasoned hardwood f17 129.
1 refer to general notes for information that is relevant for all span tables.
For simple construction such as domestic construction this can be determined from span table supplements in as1684 2 and as1684 3.
Span tables f7 rafters a maximum roof pitch of 25 degrees is assumed.
Design engineers in accordance with as1684 1 1999 and include the most up to date loading combinations from.
Timber structures fire resistance for structural adequacy of timber members.
Thora timbers dressed hardwood span tables we hereby certify that the span tables prepared for thora wholesale timbers p l for dressed hardwood stress grades f14 and f17 have been prepared generally in accordance with the design criteria contained in as 1684 1 1999 residential timber framed.
Western wood products association provides the western lumber span tables book in digital format.
Southern pine council provides a range of span tables for southern pine joists and rafters.
Construction details should be in accordance with as1684 2.
Table assumes a maximum flooring mass of 40kg m2.
The spans given in these tables have been developed by experienced timber.
As 1684 1 1999 amdt 1.
Wind classification n1 n2.
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.
3 where rafters are equal to or exceed four times their breath blocking should be used to reduce distortion.
Residential timber framed construction design criteria.
Design criteria and loading.
2 for design parameters refer to figure 7 26.
Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads.
Residential timber framed construction design criteria.
Pergola rafter spans for 600 mm and 900 mm spacing.
Seasoned hardwood f17 table 1a bearers supporting single storey loadbearing walls maximum floor load width 1800mm.
Span tables allow users to choose an appropriate size and stress grade to achieve spanning needs.
Apa provides span tables for apa structural use panels.
