Nhbc Roof Truss Bracing

7 2 9 bracing for trussed rafter roofs.

Nhbc roof truss bracing.

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 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. Details of bracing requirements. Appendix 7 2 g strutting for attic trusses and cut roofs that have 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. Balcony drainage timber balconies and terraces revised october 2018 nhbc standards chapter 7 2 pitched roofs. 7 2 11 support for equipment. Flat coastal fringes fens airfields and moorland.

7 2 14 underlay and sarking. Details of mono pitch lean to roofs and roof intersections i e. 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. The layout of trusses and associated items.

7 2 10 strutting for attic trusses and cut roofs that form a floor. The roof should be braced using at least 100mm x 25mm timber. 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 15 ventilation vapour control and insulation.

Nhbc standards chapter 7 1 flat roofs and balconies. Fixing to longitudinal bracing members using eight 25mm x 4mm steel screws evenly distributed along the length of the strap figure 2. Chapter 7 2 2003 amendments to the standards 2003 source. 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.

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. Nhbc standards 2020. Additional bracing may be needed in exposed areas. List of chapters index.

The minimum bracing requirements are shown in appendix 7 2 c. 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. Bracing requirements for trussed rafter roofs. Appendix 7 2 e tank support details.

To accommodate hatch openings or chimneys spacing may be increased to a maximum of twice the nominal spacing. Where the maximum 600mm spacing cannot be achieved e g.