Permitted dimensional deviations

Permitted dimensional deviations

The maximum permitted dimensional deviations from nominal sizes for sawn timber are shown in the following tables:

Maximum permitted dimensional deviation for sawn-surface sawn timber

Dimension

Dimensional deviation

Thickness and width ≤ 100 mm

- 1.0 … + 3.0 mm

Thickness and width ≥ 100 mm

- 2.0 … + 4.0 mm

Length when sorted according to length

- 25 … + 50 mm

Length when cut to the specified size

±2.0 mm

Maximum permitted dimensional deviation for dimensioned sawn timber

Dimension

Dimensional deviation

Thickness and width ≤ 100 mm

±1.0 mm

Thickness and width ≥ 100 mm

±1.5 mm

Length when sorted according to length

- 25 … + 50 mm

Length when cut to the specified size

±2.0 mm

Maximum permitted dimensional deviation for all-round planed sawn timber

Dimension

Dimensional deviation

Thickness ≤ 20 mm

±0.5 mm

Thickness ≥ 20 mm1

±1.0 mm

Width ≤ 100 mm

±1.0 mm

Width ≥ 100 mm

±1.5 mm

Length when sorted according to length

- 25 … + 50 mm

Length when cut to the specified size

±2.0 mm

1) The maximum permitted dimensional deviation for thickness in floorboards is always ± 0,5 mm

The average values for the actual thickness and width of pieces belonging to a batch of sawn timber cannot, however, be less that the nominal size. In the D quality, greater dimensional deviations than given above are permitted.