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ADA Tolerances - Related Industry Standards

Other international standards

Australian NATSPEC Reference Volume 1: Building Works, Concrete Finishes Section Three classes of surface finish based on using a straightedge method of testing: Class A has a maximum deviation of 3 mm in 3 m, Class B has a maximum deviation of 6 mm in 3 m, and a Class C has a maximum deviation of 6 mm in 600 mm.
TR 34 Concrete Industrial Ground Floors—Specification and Control of Surface Regularity of Free Movement Areas, UK Concrete Society (provides for three classes of industrial surfaces based on maximum permissible difference in slope within 300 mm and maximum difference in elevation between points on a 3 m grid. A floor classification FM3 is the most common and requires a maximum difference of 5.0 mm over 600 mm. A floor classification FM2 requires a maximum difference of 3.5 mm over 600 mm.)
NZS 3109 Concrete Construction Standard, Standards New Zealand (this standard requires the elevation of a slab to be ±5 mm of that specified)
NZS 3114 Specification for Concrete Surface Finishes, Standards New Zealand (gradual deviations are within 5 mm over a 3 m span for most classes of finish; abrupt changes must be less than 3 mm in 200 mm)

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