Lou Tristao founded Tristao Expanding Masts which became Tri-Ex in 1985, after the sale of Tristao Towers creating U.S. Tower. The Wilson crank-up towers, for his son, were his designs.Lou Tristao, KG6VY (sk) passed away September 2001.
Karl Tashjian worked at Tri-Ex Tower Corporation from 1985 to 2000.
While at Tri-Ex, he was the engineer of record for hundreds of towers, working on tower designs for the amateur radio, cellular, FM, TV, AM radio, and the US Army.
In 1997, International Tower was formed from Tri-Ex Towers and S&G Communication. ITI specialized in tall towers for the broadcast industry. While at ITI, the engineering group which Karl was in charge of engineering and designed several candelabrum towers approximately 2,000 feet tall, 1860' tower 10' face tower in Louisiana, a 1,000 foot tall candelabrum in downtown Atlanta guyed at 35%, along with many other tall heavy towers.
In January of 2000, SpectraSite Broadcast group purchased International Tower Inc. SpectraSite closed the engineering offices at the Tri-Ex plant in Visalia in October of 2000, at which time Karl began consulting full time. The old Tri-Ex Towers Corp. was dissolved in California so Karl Tashjian incorporated as Tri-Ex Towers Corp. in California in Jan. 2002.
In Jan. 2003, Karl changed the name of the corporation to Tashjian Towers Corporation. Tashjian Towers does NOT manufacture the complete catalog of earlier Tri-Ex Towers.http://www.tashtowers.com/crankup.html
Tashjian Tower Accessorieshttp://www.tashtowers.com/pdf/Accessories2012.pdf
Tashjian Towers use a different fold-over mechanismhttp://www.tashtowers.com/pdf/tiltover.pdf