Roof bracing is a pre-punched ‘V’ shaped component that fixes in an ‘X’ or ‘V’ pattern to the top of the top chord to firmly brace roof trusses to the building frame. Roof trusses are braced using Roof Bracing to prevent buckling or rotation of trusses when affected by winds or heavy loads.Click to see full answer. Similarly, why is roof bracing needed?Most people in the building industry probably assume that roof truss bracing is only necessary to prevent the trusses from being blown over. Lateral forces from the roof battens that, apart from supporting the roof material, are also preventing the truss top chords from buckling.Likewise, what is a roof support? Depending on the roof covering material, either horizontal laths, battens, or purlins are fixed to the rafters; or boards, plywood, or oriented strand board form the roof deck (also called the sheeting or sheathing) to support the roof covering. Then, what is Rafter bracing? The rafter diagonal brace provides the bracing restraint to prevent the rafters from buckling sideways (lateral buckling). The rafter diagonal brace is nailed to the underside of rafters, is fixed at the wall plate and runs up to the ridge at an angle of approximately 45° to the rafters (Figure 7.05 on following page).What is roof blocking?Blocking between rafters (or trusses) is used at the bearing points of rafters and ceiling joists to prevent lateral movement or rolling of the rafter. Roof beams and blocking can be either sawn lumber or engineered lumber.