Nhbc Roof Truss Bracing

7 2 11 support for equipment.

Nhbc roof truss bracing.

Details of mono pitch lean to roofs and roof intersections i e. 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. Appendix 7 2 g strutting for attic trusses and cut roofs that have a floor. Nhbc standards 2020.

List of chapters index. Appendix 7 2 e tank support details. The minimum bracing requirements are shown in appendix 7 2 c. The layout of trusses and associated items.

Chapter 7 2 2003 amendments to the standards 2003 source. Where the maximum 600mm spacing cannot be achieved e g. 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. 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.

Flat coastal fringes fens airfields and moorland. 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 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.

The roof should be braced using at least 100mm x 25mm timber. 7 2 15 ventilation vapour control and insulation. Nhbc standards chapter 7 1 flat roofs and balconies. Appendix 7 2 f sizes and spacing of tile battens.

Fixing to longitudinal bracing members using eight 25mm x 4mm steel screws evenly distributed along the length of the strap figure 2. 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. 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. Details of bracing requirements.

To accommodate hatch openings or chimneys spacing may be increased to a maximum of twice the nominal spacing. 7 2 9 bracing for trussed rafter roofs trussed rafters shall be suitably braced to support applied loads and self weight without undue movement. Additional bracing may be needed in exposed areas. 7 2 14 underlay and sarking.

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. Balcony drainage timber balconies and terraces revised october 2018 nhbc standards chapter 7 2 pitched roofs.