I recently designed a new steel bridge on a 45 degree skew with staggered cross frames. I received a comment from the DOT reviewer that this increases the possibility of fatigue cracks. I was puzzled by this comment, as everything I have read says that staggered cross frames reduces cross frame forces. If you reduce the connection force shouldn't the magnitude of the stress go down? I do understand that it increases the lateral bending in the flanges.
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