Roof planes less than 6m2 e g.
Roof bracing nz.
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.
Projects 2 m or less from the building it does not need to have roof bracing.
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.
The bracing described in this brochure covers both framed roofs and fully trussed roofs.
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.
Using the same house as in the previous articles on subfloor bracing build 132 pages 38 41 and wall bracing build 133 pages 32 36 we use nzs 3604 2011 timber framed buildings section 10 3 to work out the roof space and roof plane bracing required.
Dormers porches do not require bracing.
Roof braces can consist of either i roof plane brace or ii roof space brace or combination of the two.
Pryda have been at the forefront of the construction industry in new zealand for over 50 years.
Our speciality being timber prefabrication and traditional truss and frame supported by a huge diversity of timber connectors and structural brackets.
Roof bracing is unlikely to have any effect if veranda roofs up to 2 m wide are securely fixed to or restrained by the structure of the building.
Angle brace may be used as either compression or tension brace.
Branz structural engineers suggest a rule of thumb that where a lightweight veranda roof.
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.
The house has a gable roof with 300 mm overhangs at the soffit and verge on the 2 storey section and a hip roof on the single.
Bracing products lumberlok roof and wall bracing products are available in various lengths widths and gauges to suit a variety of bracing applications.
P21 a wall bracing test and evaluation procedure this outlines the p21 test method for wall bracing elements which is called up in nzs 3604 2011 timber framed buildings as the means to determine wind and earthquake ratings of timber framed sheet lined bracing elements for buildings.
Roof area is the actual plan area of the roof and includes overhangs.
Bracing sometimes not required for truss and framed roofs roof space bracing and roof plane bracing are not required where there is sarking that meets nzs 3604 2011 clause 10 4 4 requirements or where there is a structural ceiling diaphragm complying with clause 13 5 directly attached to the rafters.
