Ploughman
Established Member
Dave, the kink in 4496M looks like it's the section of track shown in 4492M. That section looks like it's made up with steel, timber and concrete sleepers. Strange; maybe as a cost saving measure it was a demonstrator or sample, stolen from Railtex after the show.
As far as the kink when installed, although it's probably at the limit of misalignment, but final tensioning can pull joggles like that out, just look at the photos showing the third track near Roby whilst it was being laid. I don't remember it being like that when we did the line, my camcorder wouldn't have covered the shake from that in a 185 at 80+!
I think that the track panel in question may be a transition panel. It does not look like an Adjustment switch as no strapping rails and no timber bearers but normal looking Timber sleepers.
Possible that the Steel sleepers are on FB113 rail and the New Concrete G44? sleepers may be on CEN60 rail.
So a "Transition rail" may be needed to cater for the different rail depths.
The actual transition step would be in the middle of the 4 timber sleepers.
At a guess, The variation in alignment being the difference between the old alignment and the new. Relay as much as possible to the new 6ft dimension and have a temporary run out into the existing. Looks horrible but only a temporary measure.
May also be possible that this panel is just made of FB113 rails.
It is a requirement for a specified number of timber sleepers to be installed between Concrete and Steel sleepers. Due to different stiffness values of the sleepers. ( I am sure J Locke will know more)
In either case the panel could be installed one week then uplifted and moved forward along the track as the renewal continues, saving building it up each week.
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