SNDF import: Different interpretation of beam rotation

Anonymous — Mon, 24 Oct 2016 11:32:01 GMT

Hello,

we developing 3rd Party tool sets withing AutoCAD and AutoCAD Plant3D to remodel beams and beam structures from pointclouds.
Some of our customers want to export these remodeled beams into SDNF-Format, e.g. to import them in Revit Structure.
So we wrote an SDNF-exporter 2 years ago.

We tested and optimized our exporter to work together with Revit 2014 and the AutoDesk SDNF-Importer and Exporter:
https://apps.autodesk.com/RVT/de/Detail/Index?id=2545426746461209273&appLang=en&os=Win64

After an support case provided by our customers, I tested the AutoDesk Advance Steel plugin:
https://apps.autodesk.com/RVT/de/Detail/Index?id=4943777542333709329&appLang=en&os=Win64

I recognized that the behaviour and especially the orientation some beams are different between both plugins.
So, my question is, which plugin behaves correctly and if you have an specification how to interprete the SDNF-data corretly?

Find attached and sample SDNF-File.

The "L150x100x10" beam has different orientation when importing with the two plugins.

Kind regards
Harald

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SNDF import: Different interpretation of beam rotation