Alexander A. “Sak” Sakhnovsky, a pioneer of test methods for curtain-wall stability, died of heart failure at age 84 on June 19 in Miami. SAKHNOVSKYWhile running a housing research laboratory at the University of Miami, Sakhnovsky was among the first to perform window testing, in 1954. A trained chemist, he was instrumental in developing, in the 1960s, the American Society for Testing Materials' static water- leakage test. It remains virtually unchanged today. Sakhnovsky bought the lab and launched Construction Research Laboratory Inc. (CRL), Medley, Fla., in 1968.CRL is considered the world's first and largest curtain-wall test facility, with 40 test
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.