Loads are calculated in accordance with table 3 1 of as nzs 1170 1 2002.
Timber roof batten span tables.
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.
Refer to as1684 tables for other overhang spans.
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.
Stramit roof batten 0 48 0 48 mm g550 0 60 kg m stramit roof batten 0 55 0 55 mm g550 0 77 kg m stramit cyclonic roof batten 0 75 mm g550 0 98 kg m stramit ceiling batten 0 42 mm g550 0 37 kg m stramit wa ceiling batten 0 42 mm g550 0 34 kg m.
We supply 38 x 38mm or 28 x 38mm non structural timber battens for tile roofs.
Timber to be covered these span tables do not apply to timber which is fully exposed to the elements.
The high performance values of steel roof battens means they are an increasingly popular choice for reroofing or for new builds using tile roofs.
2 for design parameters refer to figure 7 26.
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.
Roof load width rlw and floor load width flw can be determined from as1684 or from the images below.
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.
Span tables f7 rafters a maximum roof pitch of 25 degrees is assumed.
Maximum wind speed n2 refer to as4055 for site wind.
Ns not suitable general notes 1.
Table 2l pergola or carport beams wind classifications n1 n2 n3 and c1 member size roof load width.
Required size for a given span.
Wind classification n1 n2.
Joists crippled over supports shall be considered as single span joists.
Pergola rafter spans for 600 mm and 900 mm spacing.
Timber battens for tile roofs must meet the requirements of as 1684 2 as 1684 3 or as 1720 1.
Member tables for seasoned timber stress grade f17.
For details of weights refer to about technical.
Construction details should be in accordance with as1684 2.
1 refer to general notes for information that is relevant for all span tables.
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.
3 where rafters are equal to or exceed four times their breath blocking should be used to reduce distortion.
Spacing should be interpreted as the centre to centre distance between adjacent parallel members.
Table assumes a maximum flooring mass of 40kg.
