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Building Tolerances

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Typical building tolerances are indicated below:

Floors, Flatness

Measured over a 3 m long straight edge:

  • Concrete, in situ : 5 mm
  • Floor screed : 5 mm

Wall Vertical

  • Brickwork : 10 mm
  • Blockwork : 10 mm
  • Concrete, in situ : 17 mm
  • Concrete, precast : 11mm

Column Vertical

  • Steel : 6 mm
  • Timber : 10 mm
  • Concrete, in situ : 12 mm
  • Concrete, precast : 10 mm

Space between Walls

  • Brickwork : 20 mm
  • Blockwork : 21 mm
  • Timber : 30 mm
  • Concrete, in situ : 24 mm
  • Concrete, precast : 18 mm

Space between Columns

  • Steel : 12 mm
  • Timber : 12 mm
  • Concrete, in situ : 18 mm
  • Concrete, precast : 13 mm

Beams, Vertical Position

  • Steel : 20 mm
  • Timber : 20 mm
  • Concrete, in situ : 22 mm
  • Concrete, precast : 23 mm

Floors, Vertical Position

  • Concrete, in situ : 15 mm
  • Concrete, precast : 15 mm

Plan Position

  • Brickwork : 10 mm
  • Steel : 10 mm
  • Timber : 10 mm
  • Concrete, in situ : 12 mm
  • Concrete, precast : 10 mm
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