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<?xml-stylesheet type="text/xsl" href="https://communities.bentley.com/cfs-file/__key/system/syndication/rss.xsl" media="screen"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/" xmlns:wfw="http://wellformedweb.org/CommentAPI/"><channel><title>Interaction ratio for single angles</title><link>https://communities.bentley.com/products/ram-staad/f/ram-staad-forum/66102/interaction-ratio-for-single-angles</link><description>STAAD output is providing me an interaction ratio for a single angle member of more than 2000 for clause H1-1 of AISC ASD code criteria. When I verify this by hand, the interaction of fa/Fa alone is greater than 0.15 which tells me that H1-1 no longer</description><dc:language>en-US</dc:language><generator>Telligent Community 12</generator><item><title>Re: Interaction ratio for single angles</title><link>https://communities.bentley.com/thread/169233?ContentTypeID=1</link><pubDate>Wed, 20 Apr 2011 18:57:26 GMT</pubDate><guid isPermaLink="false">6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:46b6e91b-1637-47dc-8070-e99f07ecc7fc</guid><dc:creator>eguerra</dc:creator><description>&lt;p&gt;Thanks a lot &amp;nbsp;SKLose, this was really helpful in trying to understand this misleading ratio. The failing clause was H1-1. I wasnt expecting STAAD to &amp;quot;artificially magnify&amp;quot; this ratio. Again, thanks a lot for your time and assistance.&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>Re: Interaction ratio for single angles</title><link>https://communities.bentley.com/thread/169163?ContentTypeID=1</link><pubDate>Wed, 20 Apr 2011 06:48:11 GMT</pubDate><guid isPermaLink="false">6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:dd8f2a71-e8f1-4500-9833-abbd1d7e7853</guid><dc:creator>SKLose</dc:creator><description>&lt;p&gt;What is the critical condition being reported as? AISC H1-1 or H1-2?&lt;/p&gt;
&lt;p&gt;If it is H1-1, take a look at the term &amp;quot;fa&amp;quot;, the allowable axial compressive stress. Is it greater than either of the Euler buckling stresses Fey and Fez? If so, (1-fa/Fey) or (1-fa/Fez) is becoming negative which is unaceptable. STAAD may be artificially magnifying the ratio to bring this to your attention. Do you see a warning in the output file that the allowable axial compressive stress exceeds the Euler buckling stress for that member?&lt;/p&gt;
&lt;p&gt;If this doesn&amp;#39;t help, post your model.&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>Re: Interaction ratio for single angles</title><link>https://communities.bentley.com/thread/169149?ContentTypeID=1</link><pubDate>Wed, 20 Apr 2011 00:49:17 GMT</pubDate><guid isPermaLink="false">6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:f4616142-8832-452b-9494-4e40c4676260</guid><dc:creator>eguerra</dc:creator><description>&lt;p&gt;Can anyone kindly reply regarding this issue...&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item></channel></rss>