09 September 2017 0 1K Report

The aerospace industry and certifying authorities in many countries like (some require) A-/B-Basis as detailed in MMPDS for metals or CMH-17 for composites. A-Basis is the lower of the specification minimum and the T99 value where a T99 is expected to be exceeded by 99% of the population with 95% confidence. This is used for single load path structures.

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