/diy/ - Do It Yourself

>>2783421
This is the 21st Century, Anon. Use catenary arches if you want that sort of thing.

>>2783822
A bunch. Besides a wide variety of stylistic arches for decorative purposes, there are several for structural purposes. A circular arch is best suited for withstanding isostatic pressure from the outside, as in a tunnel built through loose/weak material that needs to be reinforced, or which must withstand ground water pressure. A parabolic arch is most suited to situations where the arch needs to support a downward load which is even over horizontal units of distance, as in an open-spandrel arch bridge. A catenary arch is most suited to situations where the arch is primarily supporting its own weight. A lancet (Gothic) arch is a decent approximation of catenary and parabolic arches (much closer than the circular arches in classical and Romanesque construction), so they allowed more efficient, lighter structures like cathedrals. But nowadays, people know how to properly engineer structures.