https://communities.bentley.com/products/ram-staad/f/ram-staad-forum/212060/members-failing-not-able-to-enter-fyld-design-parameter-in-is800-lsd-staad-pro-connectA part of my project is to make a PEB Industrial Shed using, built-up sections. I am just considering the primary frame in design. Problem :My all members are failing. As per my understanding, it is because it is not assigning Fyld, in IS800 LSD.en-USTelligent Community 12https://communities.bentley.com/thread/642811?ContentTypeID=1Mon, 05 Apr 2021 14:57:21 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:f6f66593-99b4-454c-8d56-4b61e832fc61Abhisek M<p>In your file if you use Track 2 parameter then you will be able to see the detailed report. From that report you will find the members are failing as the flange is slender and STAAD does not allow bending design for slender flanges.</p> <p><img src="/resized-image/__size/320x240/__key/communityserver-discussions-components-files/5932/pastedimage1617634556503v2.png" alt=" " /></p> <p>You may refer the below link to know more.</p> <p><a href="/products/ram-staad/w/structural_analysis_and_design__wiki/31733/i-sections-with-slender-flanges-not-being-checked-for-flexure-as-per-is-800-2007">https://communities.bentley.com/products/ram-staad/w/structural_analysis_and_design__wiki/31733/i-sections-with-slender-flanges-not-being-checked-for-flexure-as-per-is-800-2007</a></p> <p>You may increase the thickness of flange or reduce the width of flange in such a way that it comes out of slender range as per table 2 of IS800:2007 code.</p><div style="clear:both;"></div>