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Dimensional Tolerances

All manufactured and installed things vary to some degree from their intended or specified dimensions or locations. Those variations affect how they fit together with other things, such as a door into its frame, or their strength or formability.

For relative large things like doors, the ‘industry’ has settled on ‘standard’ fitting tolerances (by consensus) and the tolerances do not matter too much. For installed things, the location tolerances are critical to how the building fits together and a certain tolerance must be allowed for just because it's hard to build to tight tolerances.

Thickness Tolerances:

Examples:

Installation Tolerances:

Examples, with SpecLink-E choice coding: