Schedule 7
In forceMaximum permissible uncertainty and maximum permissible variation—length (Inspectors’ Class 1 and Class 2 standards)
Schedule 7 Maximum permissible uncertainty and maximum permissible variation—length (Inspectors’ Class 1 and Class 2 standards)
(paragraphs 27(a), 28(a), 32(a) and 33(a))
Column 1 Denomination | Column 2 Maximum permissible uncertainty (at 95% level of confidence): Inspectors’ Class 1 standard | Column 3 Maximum permissible variation: Inspectors’ Class 1 standard | Column 4 Maximum permissible uncertainty (at 95% level of confidence): Inspectors’ Class 2 standard | Column 5 Maximum permissible variation: Inspectors’ Class 2 standard |
|---|---|---|---|---|
Part 1 Flexible standards | ||||
≤ 10 m | 0.4 mm | 1.5 mm | 1.1 mm | 5.0 mm |
> 10 m | 0.004% | 0.015% | 0.011% | 0.05% |
Part 2 Rigid standards | ||||
≤ 500 mm | 0.04 mm | 0.15 mm | ||
> 500 mm but ≤ 1 m | 0.04 mm | 0.20 mm | ||
> 1 m but ≤ 2 m | 0.05 mm | 0.20 mm | ||
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