Corrugated 800 mm end spans and 1000 mm mid spans greca 900 mm end spans and 1200 mm mid spans trimdek 900 mm end spans and 1200 mm mid spans.

Timber batten spacing for colorbond roofing. Your choice of batten size here will be determined by the weight and span of your metal roof panels. Spacing should be interpreted as the centre to centre distance between adjacent parallel members. Each product has different requirements for example batten spacing for 0 42bmt corrugated metal roofing needs to be no more than 1100 mm apart but batten spacing for 0 48bmt metal roofing can be up to 1600 mm apart. The below spans are given for a standard n3 wind rating if you are in a high wind area you may require additional fixings and structure call us to discuss.

Spacing of the fixing will depend upon the type of joint to be sealed. The maximum overhang of house rafters or trusses shall not exceed 750 mm from outside of top plate to end of rafter truss. 9 fixings and tie down design shows that for roof battens and rafters spaced at 900 mm centres wind rating n1 in joint group jd5 two plain shank 75 mm long nails do not provide a compliant edge or general area batten to rafter connection. Please note as1684 2 2010 table 9 25 uplift capacity of roof batten tie down connections.

Required size for a given span. Fasteners in joints of simple seams flat sheet steel joints should generally be no further apart than 50mm. Roof batten maximum spans and spacing non cyclonic maximum span 1200mm maximum spacing internal spans 1200mm end spans up to 900mm span 900mm note. It s important to get the spacing of your battens correct.

Span tables f7 rafters a maximum roof pitch of 25 degrees is assumed. Construction details should be in accordance with as1684 2. They need to be evenly spaced and the correct distance apart for the kind of roof you re attaching. With a pencil mark on the beam where each of the battens will be secured.

For sheet roofed houses with 900 mm rafter spacing in wind classification n4 or c2 the minimum size of f5 or mgp 10 rafters or top chords shall be 90 x 45 mm. Measure the width of the carport using the front rafter and work out where you will place the battens. Roof load width rlw and floor load width flw can be determined from as1684 or from the images below.

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