Commentary — Appendix 3 Fatigue
C-3Commentary — Appendix 3 Fatigue
PDF page 657 · AISC 360-22
Appendix 3 includes the following major changes and additions in this edition of the Specification:
- (1) Clarified hole forming provisions for elements subject to fatigue
- (2) Replaced the list of differences compared to the RCSC Specification related to fatigue and put an illustrative list in the commentary
- (3) Corrected the categories for attachments
- (4) Added production methods for small radius cuts in elements
When the limit state of fatigue is a design consideration, its severity is most significantly affected by the number of load applications, the magnitude of the stress range, and the severity of the stress concentrations associated with particular details. Issues of fatigue are not normally encountered in building design; however, when encountered and if the severity is great enough, fatigue is of concern and all provisions of this appendix must be satisfied.
The determination of fatigue resistance for galvanized components is not explicitly addressed in this appendix.