Abstract: The invention provides snap fit pultrusion housing elements for joining structurally insulated panels suitable for housing and shelter construction. The housing elements include a pultruded panel body member having at least one edge, and a pultruded snap lock fitting on the edge adapted for fastenerless engagement with a complementary fitting on an adjacent panel body member.

Abstract: Poles for supporting electric transmission lines and a method for forming such poles are provided. An exemplary embodiment pole includes multiple interlocking inner panels forming an inner wall of the pole and multiple interlocking outer panels forming an outer wall of the pole. In inner wall interlocks with the outer wall. The method includes simultaneously forming two inner panels and simultaneously forming two outer panels. The method also includes interconnecting each inner panel to an inner panel and an outer panel, and interconnecting each outer panel to an outer panel and an inner panel.