Rensselaer Semi-Weekly Republican, Volume 40, Number 32, Rensselaer, Jasper County, 27 December 1907 — New Principle In Structural Work. [ARTICLE]

New Principle In Structural Work.

A new principle in engineering practice is described by the Scientific American in the case of a lookout tower built by Alexander Graham Bell, in which ths structure is composed of tetrahedrons, and is said to be the first iron structure built on this principle. Each tetrahedral cell, which is the unit <* construction, is made of one-half inch iron piping, and measures exactly 48 inches from tip to tip. Two hundred and sixty of these cells were employed in the tower, which rises 70 feet above the ground. Some of the advantage* claimed for this method of construction are lightness, great rigidity, rapidity and ease of construction, very little false work , being required, and the facility with which any part may be renewed.