Posted Thu, 11 Jul 2019 11:24:51 GMT by Colin Telfer North Yorkshire County Council Traffic Management & Road Safety Engineer
Will you be running courses for the imtermediate / advanced user of Keypost?  Reason for asking is some of the sign designs received from the post manufacturer have produced different results from the Keypost software, obviously down to safety factors, windloadings used etc. Desire to have further background knowledge on where and how they are used, e.g. site assessed by manufacturer as being 570N/m2 windloading from a wind loading map which represented 300N/m2, so the sign manufacturer used almost 100% safety factor based on this.  The keypost software defaults to 1200N/m2 (400%)   is the keypost software overengineering the design?

Regards
Colin
 
Posted Thu, 11 Jul 2019 13:00:14 GMT by Will Baron Keysoft Solutions Director
We do run courses, absolutely, in our fully equipped training suite, and can bring this out to customer offices if required. We haven't run an advanced course for KeyPOST yet as most elements of the software and design Standards etc. are covered in the first day. However, the finer points of how to get from a wind speed to a design pressure, using BS EN 1991-1-4:2005 (Eurocode 1), is not covered. This is because getting from a wind speed to the force on the structure involves many pieces of information, including for example the slenderness (aspect) ratio of the sign. Another thing to note is that the force used to calculate the design meets all parameters (classes) such as post bending or torsion, is different for the Ultimate Limit State (ULS) and for the Serviceability Limit State (SLS). All this means there isn't one loading appropriate for every sign at any given location for every class.

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