Originally posted by blythy
I'd've thought a circular cross section was stronger than a box section of comparable dimensions/mass per unit length.
Ordinarily using box beam, but B&M doesn't use and roll box beam, they build their own out of thick steel triangles welded together. You could theoretically use thicker walled steel tubing, but the problem is, you can't roll pipe that thick. So if you want a more ridged structure, you either need more of it, or design something else. Some of Vekoma's inverted and flying coasters have double spine to compensate, but I don't think the new track design allows for it effectively.