Barbelo Wrote:
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Not really as it isn't an arch. It's a
> triangulated, opposed truss.
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> Not really. Despite your fancy term, it's an arch.
> Segmented, just like most arches.
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> PWH

No not like most arches. Two opposed triangulated members under a compressive load.
Which dynamically functions in exactly the same way as the triangular arches in the other P'mids.
Top left in your diagram. Which is also described as an arch. (in your diagram).

The point is that there's no structural difference between the G3 arch and the non curved, lower face arches (gables, trusses, rafters, chevrons) in any other P'mid. Therefore not requiring any advancement in the understanding of structural dynamics. Just a bit more chiselling.
However the shape of the carved undersides of the opposed, triangulated members is very interesting.
Don't you think?

By the way, your diagram also describes a corbelled arch as an arch. Not all arches are created equal.



Edited 1 time(s). Last edit at 27-Oct-17 02:20 by Jon Ellison.