Appendix 7 2 f sizes and spacing of tile battens.
Nhbc roof truss bracing.
7 2 15 ventilation vapour control and insulation.
Balcony drainage timber balconies and terraces revised october 2018 nhbc standards chapter 7 2 pitched roofs.
7 2 9 bracing for trussed rafter roofs.
All timber bracing to trussed rafters should be at least 100mm x 25mm in section and twice nailed to each trussed rafter and to the wallplate.
Additional bracing may be needed in exposed areas.
Flat coastal fringes fens airfields and moorland.
The layout of trusses and associated items.
For the purposes of this chapter the guidance and use of standard trussed rafter bracing does not apply to homes on or near exposed sites e g.
7 2 10 strutting for attic trusses and cut roofs that form a floor.
Hips and valleys details of girder trusses multiple trusses and diminishing trusses including how they are to be fixed together and supported on truss shoes layboards or similar.
The roof should be braced using at least 100mm x 25mm timber.
Appendix 7 2 g strutting for attic trusses and cut roofs that have a floor.
Appendix 7 2 e tank support details.
Chapter 7 2 2003 amendments to the standards 2003 source.
Alternatively 100mm x 25mm timber members fixed over four trusses and nailed in accordance with clause 7 2 9 can be used where the position of the strap does not coincide with a longitudinal binder.
The minimum bracing requirements are shown in appendix 7 2 c.
7 2 08 bracing of mono pitch roof trusses 7 2 09 pitched roofs bedding verge undercloaks 7 2 10 attic trusses bracing 7 2 11 pitched roofs to garages holding down straps 7 2 12 roofng underlay at eaves level 7 2 13 ventilation of small roofs.
Nhbc standards 2020.
Where the maximum 600mm spacing cannot be achieved e g.
Vertical and suitably located where necessary temporary bracing should be used to maintain spacing and to keep trusses vertical evenly spaced at maximum 600mm centres.
7 2 9 bracing for trussed rafter roofs trussed rafters shall be suitably braced to support applied loads and self weight without undue movement.
7 2 11 support for equipment.
Fixing to longitudinal bracing members using eight 25mm x 4mm steel screws evenly distributed along the length of the strap figure 2.
All bracing should be twice nailed with 3 35mm 10 gauge x 65mm long galvanized round wire nails to every trussed rafter it crosses and to the wallplate.
Nhbc standards chapter 7 1 flat roofs and balconies.
To accommodate hatch openings or chimneys spacing may be increased to a maximum of twice the nominal spacing.
List of chapters index.
Trussed rafter roofs should be braced in accordance with table 1 in appendix 7 2 c unless the roof is designed and braced in accordance with bs 5268 3 or pd 6693 2 when published.
Details of bracing requirements.
Bracing requirements for trussed rafter roofs.
