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.. JAR further requires that the break load be no lower
than 1.5 times the allowed load.


Yes, 1.5 times is the ulimiate design factor for the aircraft. However
1.0 times the allowed load is the limit facter. If you exceed the
limit factor you may (will?) damage the aircraft structure but it will
not fail until 1.5 times the limit. This is especially true of metal
structures where the material itself will fail (i.e. Break) at about
1.5 times the yeild strength(i.e. bend permanently).

Brian Case
CFIIG/ASEL




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