This is the presentation I gave to the West of England Section of the Permanent Way Institution:
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Hi Vijay. Thanks for sharing this. Definitions should be considered in the context they are … defined … for.
In this presentation I explained the concept of short rail as the length of rail that, if installed and maintained right on jointed track, it does not close the joint gap not it opens it to maximum value. This refers to jointed track and the length depends of the type of joint, rail, fastening and potentially other factors. Long rail is, longer than short. These two terms refer to jointed track.
The manual you shared refers to continuous welded rail and the LWR defined there is sound – a length of rail that by itself, without additional welds, will have a section where there are no movements due to thermal variations.
CWR can be formed of LWR or of shorter than LWR rail lengths, welded together. It refers also to welded sections of S&C.
I see the manual makes a more fine differentiation between CWR and LWR that is worth discussing. I don’t think there is anything incorrect with it.
SWR sounds odd to me, at first read. That seems to be long rail of jointed track.
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Hi, what is the difference between LWR and CWR?
LWR STARTING PAGE.PMD (iricen.gov.in) is the definition given in chapter 1.3 correct or is there a different definition followed outside India?
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🙂 Yes, J Mack, I know about that.
During the presentation I used that photo as an illustration of the buckling triggering energy (see slides 31 and 32). This comes from different external factors, almost all related to track. In Christchurch the triggering energy was provided by the earthquake, as you said. I mentioned that when I commented the photo.
The photo is a very good illustration of a buckling, one of the best I know. It shows the buckle wave, the ballast pushed aside, the sleepers’ track through the ballast…
Yes, the trigger is unusual, an earthquake, but that does not decrease the value of the photo.
That is why I used it before, mentioning the earthquake, in this post:
https://pwayblog.com/2015/11/04/buckling-prevention/
If you will click on the photo it will take you to a web page commenting more about the event and showing more photos.
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You need to check your photographs before making a fool out of yourself. The cover photo of buckled track is what happens when the land moves 2 meters forward in an EARTHQUAKE in New Zealand, Christchurch, I know I was there!
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Congratulations!
Very nice!
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