C-BCommentary — Chapter B Design requirements
PDF page 378 · AISC 360-22
Chapter B includes the following major changes and additions in this edition of the Specification:
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(1) The approximate method for inelastic moment redistribution (often referred to as the nine-tenths rule) has been relocated to Appendix 8.
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(2) Clarification is provided for use of partially restrained (PR) moment connections by expanding the requirements.
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(3) Design for ponding provisions have been expanded, given that Appendix 2, Ponding, has been removed from the Specification.
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(4) Section B4.1 has clarified the requirement that webs and flanges be continuously attached.
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(5) Section B4.3 has clarified that the holes being considered are bolt holes.
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(6) Section B8, Dimensional Tolerances, has been added to clarify that the provisions of the Specification are based on tolerances provided in the Code of Standard Practice and referenced ASTM standards.