FATRNGFACT

(bracing definitions)

Purpose:  Used to modify the LRFD fatigue range in external bracing.

-->    Given in bracing input (.X)

LRFD section C6.6.1.2.1 permits a modification factor to reduce the stress range in cross frames and diaphragms because of the low probability of two vehicles being located in the critical relative positions over millions of cycles. This should only be applied if the calculated stress range is caused by loading multiple lanes.  Use of this data item is at the discretion of the user.

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