Roofing Australian Timber Span Tables

Required size for a given span.

Roofing australian timber span tables.

Stress grades and timber sizes combine to determine the spanning ability of load carrying members. Spantec has prepared these tables for use by people skilled in the design and specification of the type of. Spacing should be interpreted as the centre to centre distance between adjacent parallel members. Table assumes a maximum flooring mass of 40kg.

The imposed uniformly distributed live load in the main span. Residential timber framed construction part 2. All other data is available on page 121 of the 2012 international residential code. Posts these span tables are designed for a minimum post size of 50 x 50 x 2 5mm up to a maximum height of 3 0m.

For simple construction such as domestic construction this can be determined from span table supplements in as1684 2 and as1684 3. These charts are for 30 pound per square foot snow load on the roof. Span tables allow users to choose an appropriate size and stress grade to achieve spanning needs. 1 refer to general notes for information that is relevant for all span tables.

Flat roof span tables allow for a maximum roof pitch of 5º. Construction details should be in accordance with as1684 2. Lintel span sheet roofing tiled roofing roof load width rlw mm 1500 2100 4500 7500 1500 2100 4500 7500 maximum span of lintel mm 90 x 35 600 2000 1800 1400 1200. 3 where rafters are equal to or exceed four times their breath blocking should be used to reduce distortion.

Scope and general principles. Wind classification 1 n2. Children s nightwear and limited daywear having reduced fire hazard. 2 for design parameters refer to figure 7 26.

Loads are calculated in accordance with table 3 1 of as nzs 1170 1 2002. Use recommended minimum roof pitches as specified by roof sheet supplier. Joists crippled over supports shall be considered as single span joists. Span charts and 2012 irc building codes for girders and headers.

This is set by the roof use you selected in the previous screen and cannot be modified. Spanman increase member sizes in accordance with australian codes if the member supports brittle loads. Roof load width rlw and floor load width flw can be determined from as1684 or from the images below. Technical diagram span tables f7 rafters 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 1250 1150 1050 1000 950 90 x 30 1650 1550 1550 1400.

If the manual. Member tables for seasoned timber stress grade f17.