Timber Framing Hardwood Span Tables

Joists crippled over supports shall be considered as single span joists.

Timber framing hardwood span tables.

Timber structures fire resistance for structural adequacy of timber members. Other more complex load condition spans can be determined with our free hyne timber design 7 5 software. Pergola rafter spans for 600 mm and 900 mm spacing. Western wood products association provides the western lumber span tables book in digital format.

Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. American wood council offers a range of span tables. Member tables for seasoned timber stress grade f17 seasoned hardwood f17 129. 2 for design parameters refer to figure 7 26.

Table assumes a maximum flooring mass of 40kg m2. Span tables allow users to choose an appropriate size and stress grade to achieve spanning needs. Wind classification n1 n2. 3 where rafters are equal to or exceed four times their breath blocking should be used to reduce distortion.

The spans given in these tables have been developed by experienced timber. Design engineers in accordance with as1684 1 1999 and include the most up to date loading combinations from. With traditionally recognised framing practice as described in. 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.

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. Yspan offers an alternative to f17 hardwood beams in h. Seasoned hardwood f17 table 1a bearers supporting single storey loadbearing walls maximum floor load width 1800mm. Apa provides span tables for apa structural use panels.

Residential timber framed construction design criteria. Span tables f7 rafters a maximum roof pitch of 25 degrees is assumed. Construction details should be in accordance with as1684 2. Design criteria and loading.

You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths. For simple construction such as domestic construction this can be determined from span table supplements in as1684 2 and as1684 3. Southern pine council provides a range of span tables for southern pine joists and rafters.