Gareth, This is a bit tricky to wrap one's head around. The concept of exposed cross section and segment directions in AutoPIPE may provide answer to your question. If you know the program behavior, probably then you can update your excel sheet to get the desired results. Please go through the link below which provides details on a similar question. If there are further questions after going through that wiki, we can discuss them back here. https://communities.bentley.com/products/pipe_stress_analysis/w/pipe_stress_analysis__wiki/18013/05-forces-and-moments-output-results-appear-to-be-both-ve-and-ve-at-the-same-point-in-autopipe-why Regards, Bilal Shah
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