Appendix 7 2 g strutting for attic trusses and cut roofs that have a floor.
Nhbc roof truss bracing.
Additional bracing may be needed in exposed areas.
Chapter 7 2 2003 amendments to the standards 2003 source.
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.
The minimum bracing requirements are shown in appendix 7 2 c.
Where the maximum 600mm spacing cannot be achieved e g.
Fixing to longitudinal bracing members using eight 25mm x 4mm steel screws evenly distributed along the length of the strap figure 2.
7 2 9 bracing for trussed rafter roofs trussed rafters shall be suitably braced to support applied loads and self weight without undue movement.
Diagonal bracing to double hipped roof plasterboard fire resisting ceiling in contact with single leaf masonry use of nail guns for fixing trussed rafter bracing.
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.
Bracing requirements for trussed rafter roofs.
Flat coastal fringes fens airfields and moorland.
7 2 10 strutting for attic trusses and cut roofs that form a floor.
The layout of trusses and associated items.
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.
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.
Nhbc standards 2020.
Details of bracing requirements.
Appendix 7 2 e tank support details.
7 2 15 ventilation vapour control and insulation.
Details of mono pitch lean to roofs and roof intersections i e.
Appendix 7 2 f sizes and spacing of tile battens.
7 2 11 support for equipment.
List of chapters index.
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 roof should be braced using at least 100mm x 25mm timber.
Balcony drainage timber balconies and terraces revised october 2018 nhbc standards chapter 7 2 pitched roofs.
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.
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.
