900 King St W | 25 fl | U/C

[ijmorlan]

The construction of the embedded track is actually quite simple. They built it all in one layer here, rather than the two layer approach Toronto uses. It's basically just booting the rails, holding them in place, and then pouring concrete around them.

I think it’s actually 3 layers in Toronto. Typical replacement involves only removing the top layer and replacing the tracks; a more extensive rebuild involves rebuilding the 2nd layer, including replacing the mounting brackets for the tracks; the bottom layer is just a layer of concrete which should require replacement only after a century or more.

I’m sure there is a reference on https://stevemunro.ca somewhere but I can’t find a specific article right now.