Fixing battens to steel.
Timber roof battens span.
Fixing to roof sheets.
Construction details should be in accordance with as1684 2.
We supply 38 x 38mm or 28 x 38mm non structural timber battens for tile roofs.
Fasten the batten to every truss or rafter with a m5 5 x 40mm batten zip minimum fixing size through each flange.
Alternatively design in a specific timber or steel material type.
Roof load width rlw and floor load width flw can be determined from as1684 or from the images below.
Timber stress grade f17 seasoned hardwood f17 129.
For alternative stress grades fixing methods larger spans pitched roofs wind classification c3 etc refer as 1684 residential timber framed construction.
Manufactured from high tensile zinc al steel stratco roof and ceiling battens remain straight and consistent throughout their life.
Stratco roof and ceiling battens are light yet strong offering an economical alternative to timber.
Note that spanman automatically calculates the weight of roof battens and adds it to the roof weight.
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.
The imposed uniformly distributed live load in the main span.
Minimum bearing length 35mm at end supports.
Spacing should be interpreted as the centre to centre distance between adjacent parallel members.
Maximum span of lintel mm sheet roof 240 x 35 3400 3000 2300 3300 2900 2200 2900 2600 2100 2600 2300 2000 240 x 45 3700 3200 2600 3500 3100 2500 3100 2800 2300 2800 2600 2200 roof area supported m2 size dxb mm note.
The high performance values of steel roof battens means they are an increasingly popular choice for reroofing or for new builds using tile roofs.
Required size for a given span.
Batten mid span lapped joins minimum of 300mm 300mm 300mm 300mm 50mm minimum lap rafter waste end to be under turn down lips on battens where they intersect if the overhang of the mitred roof batten exceeds 300mm.
Fasten the two roof battens together via two fasteners mitre cut roof batten valley or hip rafter.
Stramit top hats battens capacity tables important note the information contained within this brochure is as far as possible accurate at the date of publication however before application in a particular.
Span tables f7 rafters a maximum roof pitch of 25 degrees is assumed.
Press design to obtain sizes.
This is set by the roof use.
The sizes and fixings assume pergolas are either roofed lightweight roofing 10 kg m3 or could have a roof installed at some future stage.
Roof and ceiling battens.
Fasten the batten to every truss or rafter with a 12 x 40mm timber fixing screw minimum fixing size through each flange.
