How 'Microcracks' Undermined San Francisco's New Bus Terminal

How 'Microcracks' Undermined San Francisco's New Bus Terminal

Engineers clambered up to the girders and slowly excised the cracked chunks with a diamond-oxide-studded cable saw, “so we could cut through it without heating it up and disturbing any of the evidence,” says Karl Frank, a civil engineer and steel-failure specialist working with Herrick, another company involved in building the terminal.

Use a Slo-Mo Video to Calculate How Fast Glass Shatters

Use a Slo-Mo Video to Calculate How Fast Glass Shatters

Oh, don't forget to change the frame rate in the video.Here is the plot of the position of the leading edge of the crack as a function of time.Rhett AllainI should point out that I converted the distance to meters instead of feet because I'm not a barbarian (but if you are a barbarian, I'm OK with that).