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taş , tuğla ve ahşaptır .
söylenmeyen rezalet ......
Early 20th-century engineers thought reinforced concrete structures
would last a very long time – perhaps 1,000 years. In reality, their life
span is more like 50-100 years, and sometimes less. Building codes and
policies generally require buildings to survive for several decades, but
deterioration can begin in as little as 10 years.
