User:George H. Harvey/Polymodular

A Polymodular is a structure built by the repeated use of a limited number of two-dimensional modules designed to fit together in repeating groupings. For example, a polymodular can be built using three modular shapes, a right triangle with a base of 2 units and an altitude of 3 units, an isosceles triangle with a base of 2 units and an altitude of $$\scriptstyle 2\sqrt{3}$$ units, and an equilateral triangle with each side being 2 units. The equilateral triangles form a base, or floor, on a horizontal plane; the right triangles are used for vertical planes or walls; and the isosceles triangles form a roof, each subtending one of the equilateral triangles with which it is in contact either with its apex at an angle, or with its base along one side. The polymodular may be viewed as a geometric analog of a polymer.

The polymodular has the advantage of being altered and extended in any direction over a plane. It is an experimental structure with possible applications for emergency, temporary, or inexpensive housing. It was invented in 1970 and is in the public domain.

polymodular.com