Nhbc Roof Truss Bracing

7 2 11 support for equipment.

Nhbc roof truss bracing.

Appendix 7 2 e tank support details. Appendix 7 2 f sizes and spacing of tile battens. List of chapters index. 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.

7 2 15 ventilation vapour control and insulation. The roof should be braced using at least 100mm x 25mm timber. 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. The layout of trusses and associated items.

To accommodate hatch openings or chimneys spacing may be increased to a maximum of twice the nominal spacing. 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. 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. Appendix 7 2 g strutting for attic trusses and cut roofs that have a floor.

Nhbc standards chapter 7 1 flat roofs and balconies. Nhbc standards 2020. Balcony drainage timber balconies and terraces revised october 2018 nhbc standards chapter 7 2 pitched roofs. Details of bracing requirements.

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. Details of mono pitch lean to roofs and roof intersections i e. 7 2 9 bracing for trussed rafter 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. The minimum bracing requirements are shown in appendix 7 2 c. Bracing requirements for trussed rafter roofs. Fixing to longitudinal bracing members using eight 25mm x 4mm steel screws evenly distributed along the length of the strap figure 2.

7 2 14 underlay and sarking. 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. 7 2 10 strutting for attic trusses and cut roofs that form a floor. 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.

Chapter 7 2 2003 amendments to the standards 2003 source. Additional bracing may be needed in exposed areas.