36.1.1 ScopeThis Section sets out the requirements for the construction of conventional stud-framed walls and shall be used in conjunction withSpan Tables 7 to 20 (single or upper-storey construction),36 to 48 (lower-storey construction), or51A and 53 (verandahs and posts) of the Supplements.
46.2.1 StudsCommon studs may be straightened by ‘crippling’ with saw cuts and cleats (see Figure 6.2). Up to 20% of common studs, including those in bracing walls may be crippled.Studs at the sides of openings and studs supporting concentration of load shall not be crippled.
22.214.171.124 Notching, trenching and holes in studs and plates Jamb Studs in external walls and other loadbearing walls shall not be notched within the middle half of their height or within the height of the opening.A notch up to a maximum of 20 mm in depth is permissible outside this region at the top and/or the bottom of the stud (see Figure 6.5).
12NoggingWall studs shall have continuous rows of noggings at 1350 mm maximum centres (see Figure 6.6).Noggings are not required to be stress graded.Nogging thickness shall be a Min 25mm and suitable for the proper fixing of cladding and linings.
13OpeningsOpenings shall be framed with jamb studs and lintels (heads) as shown in Figure 6.9.Jack studs shall be provided in all cases between the lintel and the top plate or trimmer. Jack studs shall be the same size and spacing as the common studs.A minimum clearance of 15 mm shall be provided between the underside of the lintel or lintel trimmer and the top of the window frame.
14Changes to the standard Figure 6.9 (a) pg 64 Spans not exceeding 1200 mm, allows the lintel to be notched into the jamb stud by ¼ of the stud thickness up to a max of 10mm.…for non loadbearing walls
16HOWEVER!Note v of Table 17 says minimum bearing length to support lintel must be 35mm.: (in connection with above) any opening greater than 900 will require two studs. One full length, and one secondary (see fig 6.9)
18Trussed roofsAlthough we are not considering truss roofs in this subject- it is important that you, as potential builders realize the following-Trusses are designed to clear span between external walls.If trusses are supported anywhere mid-span, without being designed accordingly, stresses may be placed on individual truss components that they are not designed to take.The 10mm gap is to allow the trusses to deflect particularly when / if they are subjected to their full design load.