5 ms·
Though it seems like it might be easier to ship sand for pre-stressed concrete crossties, given that all the materials must necessarily be connected to the rail
by logfromblammo 7y ago
Though it seems like it might be easier to ship sand for pre-stressed concrete crossties, given that all the materials must necessarily be connected to the rail network.
Also, I wonder why concrete crossties don't use neoprene bearing pads under the rails to reduce the abrasion problem.
- simonrobb 7y agoAre concrete crossties pre-stressed? It makes sense now I think about it, but I'm just surprised more effort than "pour concrete into a mold" goes into such an unassuming structural member.
- logfromblammo 7y agoI'd guess that poured concrete is not cost-competitive with timber crossties, and pre-stressing is the only way to make them cheaply enough to compete.