On Spec #2 — published by Finish + Form Author’s Note: This article interprets independent laboratory testing conducted under ASTM C580-18 and ISO 196 standards to examine how flooring materials respond to stress. It is intended to inform specification discussions, not replace engineering judgment. As California's SB 1953 seismic retrofit program reshapes healthcare construction ahead of the 2030 compliance deadline, understanding material behavior under movement has become a