the authored face, drawn by the app — a graduated bank looks graduated
HSC36 · the barrel belly — bows OUT and springs plumb off the 6" base, so the liner keeps full depth (the pocket rule is concave-only)
the barrel belly — bows OUT and springs plumb off the 6" base, so the liner keeps full depth (the pocket rule is concave-only) · R 41 5/8" held: arc, then a straight tangent to the 12" top · two-piece install (duct access)