For roofs the out of plane component of the dead load of the roofing and purlins is assumed to be carried in tension by fastbrace or bolted brace channels tied across the ridge or into the ridge beam for monoslope roofs.
Roof plane brace nz.
Bracing required in monopitch roofs 30 october 2014 clause 10 3 4 in nzs 3604 2011 timber framed buildings doesn t require diagonal strap bracing in the roof plane if the supporting braced wall frames extend up to the underside of the rafters and the rafters have a sheet ceiling attached directly to their underside.
Braces are marked in red a and b.
Upper storey solution a minimum of two braces are required for the upper storey roof see figure 1.
Braces are marked in red a and b.
The lower roof plan area no soffit 7 040 6 2 8 1 3 1 6 2 3 1 68 7 m.
Roof braces can consist of either i roof plane brace or ii roof space brace or combination of the two.
Upper storey solution a minimum of two braces are required for the upper storey roof see figure 1.
One roof brace is required per 50 m with a minimum of two per ridge line.
Dormers porches do not require bracing.
Method 2 prop to ground.
Roof type one roof brace per 50m2 of roof area see rule 8 for minimum requirements one roof brace per 25m2 of roof area see rule 8 for minimum requirements 1.
Method 1 post wall frame.
Roof space bracing was provided by a bracing member running from the ridge board at the gable end to an internal wall top plate figure 4.
Roof braces are not required on roofs where sarking is installed as per nzs 3604 2011 clause 10 4 4 or where a ceiling diaphragm is installed and is attached to the rafters.
Roof area is the actual plan area of the roof and includes overhangs.
One crossed pair of strips may be used in each location where a diagonal brace is required.
Strip brace provides an ideal bracing system for walls or roof plane.
Fix using 5 x lumberlok product nails 30mm x 3 15mm diameter at each end.
Angle brace may be used as either compression or tension brace.
Temporary bracing for gable end roof.
Strip brace is supplied in coils for use as bracing or use in short lengths as a jointing material.
The lower roof plan area no soffit 7 040 6 2 8 1 3 1 6 2 3 1 68 7 m.
Gable roofs were braced with diagonal braces that were either 6 x 1 150 x 25 mm solid bracing cut in between rafters or a surface brace fixed below the rafters figure 3.
Pryda has been an integral part of the building industry in new zealand for over 50 years particularly in timber truss and frame solutions with the development of a diverse.
Lumberlok roof and wall bracing products are available in various lengths widths and gauges to suit a variety of bracing applications.
Roof planes less than 6m2 e g.
