It was discovered after the 1906 San Francisco earthquake most buildings were destroyed either by the earthquake or the aftermath fire , except those built with the Kahn System by the Trussed Concrete Steel Company . The engineering services of the company was specified in many cases upon rebuilding commercial buildings in San Francisco . The company received additional unintentional beneficial publicity when earthquakes occurred in Calabria in 1905 , Messina in 1907 , Jamaica in 1907 , and the 1911 Philippines Mount Taal volcano eruption
1906 San Francisco earthquake
1906 San Francisco earthquake
Trussed Concrete Steel Company