(0,0,12,30)-deltahedron consisting of two truncated hexagonal triangles (bent outwards) that are connected as antiprisms and are vertically extended with a number of layers. The spiral is created by 3 grooves that are bent inwards (actually causing the two truncated hexagonal triangles to be bent). It is also completely rigid, and highly reminiscent of Alain Lobel's frames. This structure can be further extended by adding more layers.