Quote:
Originally Posted by Migrant_Coconut
Yeah, it's probable that Hourglass' rumour pertains to the annexes; City Hall itself is unlikely to go anywhere.
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Well, the east wing has been demolished, as it had the greatest likelihood of collapse in only a moderate earthquake. The West Annex was a bit more solid - it has a steel frame for a start, but also some pre-cast elements that have performed poorly in similar types of building in other earthquakes. They've just spent $4.5m adding angled steel braces and extra reinforcement in the basement parking, so that's less likely to have an issue in a moderate earthquake. All bets are off in something bigger - but that's true of a lot of Vancouver buildings.
The main City Hall has some issues, due to its construction. It's reinforced concrete, and there are pictures (too big to post here) of the 1936 construction [
like this in the Archives] - possibly taken by McMinsen's grandfather.
Many years ago there was a suggestion that the heritage building needs seismic dampers underneath, as it's the foundation and base that are the potential problem. There was a plan to jack up the building to insert rubber dampers under the base. Given what it must weigh, the engineering, and risk, and cost that would involve, a replacement probably makes more sense. As all the decisions are, understandably, taken 'in camera', until there's actually a decision to spend tens of millions, (or negotiate a sale and lease back which probably isn't as good an idea), we probably won't know what's proposed until it's effectively a done deal. If they're going to tie it in to the construction of the new station they'll have to decide, and come up with at least some of the money, pretty soon. Presumably they could add a new building over the station later, providing it's designed with that intent.