WALL FRAMING

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WALL FRAMING

• Section 6 of AS 1684 relates to the regulations
  governing timber wall construction

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Wall Members
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6.1.1 Scope

• This Section sets out the requirements for the
  construction of conventional stud-framed walls
  and shall be used in conjunction with
• Span Tables 7 to 20 (single or upper-storey
  construction),
• 36 to 48 (lower-storey construction), or
• 51A and 53 (verandahs and posts) of the
  Supplements.

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6.2.1 Studs

• Common 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.

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6.2.1.1 Straightening of studs (crippling)
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6.2.1.3 Wall junctions
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6.2.1.4 Notching, trenching and holes in studs
and plates

• The maximum size and spacing of cuts, holes,
  notches, and the like, in studs and plates shall
  be in accordance with Figure 6.4 and Table 6.1.

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Table 6.1 (page 61)
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notching
FIGURE 6.4 NOTCHING OFWALL STUDS
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6.2.1.4 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).

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Figure 6.5, page 61
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6.2.1.5 Nogging

• Wall 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.

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6.2.3 Openings

• Openings 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.

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Changes 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
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Refer to page 64, figure 6.9
1200mm
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HOWEVER!

• Note v of Table 17 says minimum bearing length to
  support lintel must be 35mm.
• 6.3.2.3 (in connection with above) any opening
  greater than 900 will require two studs. One
  full length, and one secondary (see fig 6.9)

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FIGURE  6.9   OPENINGS
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Trussed roofs

• Although 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.

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(No Transcript)
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Lintels

• Section 6.3.6
• Note adequate bearing required

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Sill trimmers

• Section 6.3.6.6

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Verandahs

• Beams, 6.3.7
• Posts, 6.3.8