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Mitchel –
I plan to offer another ArchiCAD User Hangout in late May – I’ll be announcing the date shortly.
Eric

Hi David –

TrussMaker is rather limited in terms of the geometry that it creates, so I prefer in general to use other modeling tools.

If you are in ArchiCAD 16 or 17, I suggest that you use the Morph tool. You can create the shape directly in 3D, or (perhaps easier) draw it flat on the ground using multiple instances of the beam tool (rectangular, round or profiled) or slabs with cutout holes, then select these elements and convert them to a morph, then rotate into a vertical position and drag into place.

In earlier versions of ArchiCAD, before the Morph tool, instead of converting to a morph then rotating, you can select these beams and/or slabs and use Show Selection/Marquee in 3D to view them in the 3D window in isolation, then rotate your view to a side elevation from 90 degrees (nominal north or the top of the screen) using the 3D Projection Settings command, then select the elements and choose File menu > Libraries and Objects > Save Selection As Object, which will create an object with the geometry rotated so the elements stand upright.

Eric