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SLIGHTLY O.T.: Architectural Term For "This" Sort Of 3D Shape...

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Imagine you have a roof on top of a round structure--it's a circular roof
in plan. (Also, you must imagine that the roof is made of a highly
elasto-plastic material so that you can shape it anyway you want).

Now, imagine that the roof slopes from center to circumference so that in
three dimensions it's a shallow cone.

Now, back in the plan view: Slice the roof into twenty-two equal wedges--
you can "lop off" a tiny bit of the pointy-end of the wedge, we'll just
fill that in later with some sort of "cap" or "plug" when we put all the
wedges back together.

Next, FOLD each of the wedges so that it looks like a paper airplane. You
don't have to get fancy, just fold once along the long symmetric axis of
the wedge, then fold out a "wing" to each side of that first fold (no
"tucking in" or multiple folding needed). Allow the wedge to sort of "fan
out" a little away from the first fold but keep the "wings" horizontal by
"bending" a little at the secondary folds.

Oh, and don't forget to "stretch" the material you're using a little so
that the wedge STILL has the same dimensions in plan as it did before you
did all that folding.

Finally put each of these paper-plane thingies UPSIDE DOWN back on top of
the round structure--assume you have internal supports of whatever kind
you desire sitting inside the structure to hold up the small end of the
roof wedges.


Now you have an "attractive" sort of tank-like structure with a "folded
plate" roof that provides twenty-two "trapezoid-oidal" channels (with a
cross-section that varies along the radial axis) running away from the
central axis of the structure to the circumference. And correspondingly,
twenty-two "fins" of triangular-oid shape (again, varying in dimension
from small to large as you go away from the center).

Now, what the h*ll do you call that roof's shape? Is it in the Architect's
lexicon, ancient or modern?

Thanks for the comments in advance.

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