Timber Roof Batten Span Tables

1 refer to general notes for information that is relevant for all span tables.

Timber roof batten span tables.

These span tables apply only to flat roof and roof with a slope of up to 10 degrees. Design of single span rafters in roofs in houses office buidlings schools and other structures. Refer to as1684 tables for other overhang spans. Timber battens for tile roofs must meet the requirements of as 1684 2 as 1684 3 or as 1720 1.

3 where rafters are equal to or exceed four times their breath blocking should be used to reduce distortion. Table 2l pergola or carport beams wind classifications n1 n2 n3 and c1 member size roof load width. Table assumes a maximum flooring mass of 40kg. Timber to be covered these span tables do not apply to timber which is fully exposed to the elements.

2 for design parameters refer to figure 7 26. Timber queensland limited technical data sheet 19 pergolas and carports revised march 2014 page 3 pergola or carport beams tables 2l and 2h list the sizes and spans for pergola or carport beams in low wind speed and higher wind speed areas. Joists crippled over supports shall be considered as single span joists. Construction details should be in accordance with as1684 2.

Note that spanman automatically calculates the weight of roof battens and adds it to the roof weight. Notches are not to exceed 0 125 of the depth of the joist and are to be located between 0 07 and 0 25 of the span from the support. Wind classification n1 n2. For details of weights refer to about technical.

Maximum wind speed n2 refer to as4055 for site wind. Maximum overhang of batten is 250 mm. Roof load width rlw and floor load width flw can be determined from as1684 or from the images below. We supply 38 x 38mm or 28 x 38mm non structural timber battens for tile roofs.

Ns not suitable general notes 1. Loads are calculated in accordance with table 3 1 of as nzs 1170 1 2002. Pergola rafter spans for 600 mm and 900 mm spacing. 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.

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. The high performance values of steel roof battens means they are an increasingly popular choice for reroofing or for new builds using tile roofs. All tables have been reproduced from as1684 2006 residential timber framed construction standard and assumes that a roof sheet mass of 10 kg m2 is added. Span tables f7 rafters a maximum roof pitch of 25 degrees is assumed.

Member tables for seasoned timber stress grade f17.