Indicates whether to allow a maximum B31.3 stress range factor, f. Starting with the 2004 edition, B31.3 permits the stress range factor to exceed 1.0 under certain conditions.
On
Allows f to exceed 1.0, up to the limit of 1.2
Off
Limits f to a maximum value of 1.0.
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This option is distributive and applies to the current and all following elements until you change it.
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This option is not used for B31.3 Chapter IX.