Please find the following informative article detailing the use of selectively-hardened fasteners Bi-Flex and Dril-Flex in the construction of the Adrienne Arsht Center for the Performing Arts in Miami, Florida.
Selectively hardened fasteners with corrosion-preventative coating protect the integrity of the structure and avoid the dangers of hydrogen assisted stress corrosion cracking (HASCC), also known as delayed hydrogen embrittlement. In exterior applications or aggressive interior environments, bi-metallic or superalloy fasteners are recommended.
Labor-reduction associated with the new super alloy fasteners is expected to result in even more significant overall savings, especially on high-rise structures.
Please read further in the following pdf article, Small Details, Big Consequences