Up and down

"Up and down, Up and down, I will lead then up and down. I am feared in field and town. Goblin, lead them up and down." -- Puck, in Shakespeare's A Midsummer Night's Dream, Act III The up and down elements of a structure are in theory vertical, but Chicago in 2021 oblique structural elements are becoming visible for everyone to see. (It seems to be happening worldwide.) Maybe oblique members have become newly available in structural analysis software. Are oblique elements a new fashion statement? Are they attempts at humanizing engineering or dehumanizing architecture? I don't know, but I sure see a lot of them lately. The use of angled beams in structures has been around more than a century, but such members were always hidden. (Flying buttresses may be related to cross-bracing, and once flying buttresses were subjects of disdain.) Cross-bracing was highly visible in San Francisco's Maritime Plaza (originally Alcoa) of 1964 and in Chicago's 875 Michig...