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I'm an old codger with over 50 years of good engineering experience. I'm still actively designing. Most of my work, now is related to structural steel connections, but my experience is very wide. The reason for joining this site, is that there is an engineer in Vietnam that has a very irregular building 'footprint' (shape) and is seeking advice for locating expansion (control) joints. The joints are not constrained by dimension, but are determined by the irregularity. Thanks. Dik

Hi Ali, End release is not preferred in concrete elements since it will require to allow for some cracks on beams and also difficult to detail in drawings Releasing frames may touch the stability also of the lateral framing system unless you have another existing system cover this. You may design column as flexure member by adding localized reinforcement covering moment only from one side and can be developed from one side to the beam/slab

Hi there, I have studied this code and there is enough information such as modeling the baseline (regular) buildings and summary of results in Appendix C, but there is no information about modeling (especially section designs) irregular ones. The first paragraph of aforementioned Appendix is stated as follows: For details on the steel moment frame designs with irregularities and for detailed results of the steel moment frame studies, see the electronic supporting documentation for Appendix C "steel moment frame irregularity designs and detailed results" (You can see the green highlighted text in below pic). Is there any electronic supporting documentation for this code? or is there any information of section designs that we directly use these buildings as benchmark structures? many regards,