Given that Santa Monica is in the USA, my suspicion is that it's wood frame rather than mass timber as deployed elsewhere, with thick heavily insulated flooring

Given that Santa Monica is in the USA, my suspicion is that it's wood frame rather than mass timber as deployed elsewhere, with thick heavily insulated flooring, see e.g. https://www.youtube.com/watch?v=bZGuSC7KNvM https://www.youtube.com/watch?v=bZGuSC7KNvM