Triodetic dome


A Triodetic dome is a type of geodesic dome whose space frame is constructed using Triodetic connectors, invented in 1955 by Canadian architect Arthur E. Fentiman.

History

Triodetic connectors were invented in 1955 by Canadian architect Arthur E. Fentiman, and patented in 1958. The system was developed further by A. E. Fentiman's brother, Harold Gordon Fentiman and was in commercial use by 1960. Triodetic Structures Ltd was established in 1962 to market the system; the Fentiman family sold the company in 1977.

Description

The connector consists of a hub, usually of aluminium, with up to twelve slots into which tubes can be inserted. The assemblage is stabilized by a central bolt with a washer. It is generally used with aluminium tubes, but stainless steel was introduced in 1966. The tubes do not require bolting or welding together, and the frame can be put together by non-specialists using basic equipment.
Various shapes in addition to domes are possible, including barrel vaults, pyramids and hyperbolic paraboloids. Recent applications of the system have included as foundations for building, which can function on permafrost.

Examples of Triodetic structures

Canada
United States
Elsewhere