Timber Framing Hardwood Span Tables

3 where rafters are equal to or exceed four times their breath blocking should be used to reduce distortion.

Timber framing hardwood span tables.

Span tables allow users to choose an appropriate size and stress grade to achieve spanning needs. Seasoned hardwood f17 table 1a bearers supporting single storey loadbearing walls maximum floor load width 1800mm. The spans given in these tables have been developed by experienced timber. 1 refer to general notes for information that is relevant for all span tables.

Pergola rafter spans for 600 mm and 900 mm spacing. Western wood products association provides the western lumber span tables book in digital format. 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.

Timber structures fire resistance for structural adequacy of timber members. Table assumes a maximum flooring mass of 40kg m2. Residential timber framed construction design criteria. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths.

Wind classification n1 n2. Member tables for seasoned timber stress grade f17 seasoned hardwood f17 129. Construction details should be in accordance with as1684 2. Design criteria and loading.

Apa provides span tables for apa structural use panels. American wood council offers a range of span tables. 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.

Span tables f7 rafters a maximum roof pitch of 25 degrees is assumed. Joists crippled over supports shall be considered as single span joists. 2 for design parameters refer to figure 7 26. 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.

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. As 1684 1 1999 amdt 1. For simple construction such as domestic construction this can be determined from span table supplements in as1684 2 and as1684 3.