6.3 Internal walls

Also see:

9.2

6.3.9 Construction of timber partitions

Construction of timber stud internal walls shall ensure adequate stability, including:

  1. setting out and workmanship
  2. size of timber members
  3. fixing.

Setting out and workmanship#

Timber partitions should be:

  • placed so the lowest timber is positioned at or above the internal finished floor level, see Figure 8
  • correctly positioned, square and plumb
  • have studwork spaced at centres to suit the plasterboard thickness
  • have extra studs at openings, as required.

Size of timber members#

Timber partitions should be constructed in accordance with the design information. Unless designed otherwise, the minimum specification for all partitions should be in accordance with Table 3.

Table 3: Timber sizes for partition walls

ComponentSize
Sole plate, rails, head binders63mm x 38mm
Studs63mm x 38mm at maximum 600mm centres
Blocking/nogging for support of plasterboard43mm x 38mm
Blocking/nogging for other purposes63mm x 38mm

Framing joints should be secured with two nails per joint.

Fixing#

Partitions should:

  • be firmly fixed to each other and to abutting walls; noggings or extra studs should be used where necessary
  • be fixed to the structure where possible
  • be fixed to noggings when parallel to structural elements
  • not be over wedged against floor joists or roof trusses.

Where partitions are non load-bearing, allowance should be made for the floor joists, ceiling joists or roof trusses to deflect as necessary, so that the partition does not become load-bearing.

Noggings should be provided to support fittings, such as radiators, wall mounted boilers, sanitary fittings and kitchen units, etc.

Last updated: 2nd January 2024

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