Last Long Sleeper Location

Last Long Sleeper Location is currently not in use in the S&C Library that Network Rail have provided in the UK. I can see why they have chosen not to use it due to the variation in LLB/LLS placement as a result of bending in similar/contraflexure, as well as the differing manufacturers drawings, but I would like to know if anyone uses it with regularity or with any degree of reliability. I would like to use it to inform my vertical/horizontal design for a project in N.Ireland

I tried to use this for a custom turnout I have created. I worked out where the approximate placement of the LLB was, and the distance this point was from the .2 of the turnout as per the schematic in the help section of Bentley Rail Track. My issue is when I place this turnout, the LLB location comes in nowhere near the location I have specified. I have specified 12m from .2 to the LLB, but the LLS is being placed 6.808m from the .2 point.

The Turnout is on straight and level track with no applied cant

Has anyone experienced this before? Have attached some pictures for information

Would appreciate any help

Thanks

A

Parents
  • I created the same turnout and I get the good length. Note that I can't see the branch element on your picture. The LLS is created when the branch element is created. I tested on 08.11.07.685.



  • @jpln
    Thanks for this - I tested it again with a long connection element and managed to get the 12m length to work.
    Do you have any issues when creating a crossover using the connection editor. I believe this is where my original problem originated.
  • Ok I understand the issue. Unfortunately I don't see any way to manage this using connection editor. So you have to manually locate the LLS and maybe use a COGO point to store it while being able to display/annotate it in plan and profile



  • I would take a look at REPW2251.pdf (a Network Rail standard drawing).  In this case there is not a single long sleeper, but multiple (i.e. spanning across both mainlines).  So from a Rail Track standpoint, I would not use the LLS length as defined in the turnout library, but instead I would use a value of zero.

    Regards,

    R. W. Bradshaw

  • Yes - in this or similar is what I am trying to display. In a single turnout - this works fine, but it falls over when in crossovers.
    Could you set the LLS sleeper value as negative to capture the LLS from the opposite turnout?
  • Negative will not work! I have no solution for that!
    Regards,
    R. W. Bradshaw
  • Ha!
    Sounds like we have exhaused this.
    Many thanks all for the input, cogo points looks like the best bet for my workflow at this point.
    A
Reply Children
No Data