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hamrack
HHC
Yeah, I took shell to exclude tension structures, rather thinking along the lines of concrete shells.
Yeah, classic numberphile video; where does it address whether saddles are better than domes, all I thought it said was that the Gaussian curvature of anticlastics are negative and synclastics are positive?
For some reason had it in my head that saddles where intrinsically more efficient a (concrete shell) structure than domes. Must be mistaken.