u/AnonymousSeaCaptain

Hey everyone, I'm trying to find photo/ video examples of early roller bearings used for thermal expansion/ seismic isolation on bridges. Specifically using a rack and pinion style cogged/gear-like system.

I saw the example in a video some time ago, and have been fascinated ever since. But I understand this type of design was pretty rare, so finding any examples beyond like two has been a nightmare.

My memory may be betraying me, but I'm almost certain the example I saw was much larger and employed on the abutment / end piers and not the center piers of the span. It's driving me crazy.

Are there any others out there beside this one?