Ploughman
Established Member
Is stressing of CWR over short waybeam bridges allowed?
Less than 15m.
Cannot see any mention in my last isssue of TRK / 0011
Less than 15m.
Cannot see any mention in my last isssue of TRK / 0011
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Stressing of waybeam bridges
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mr_moo
Member
Firstly, I'm going to assume you are referring to NR maintained track and I have answered accordingly:
Yep. Stressing rules have changed about a bit in the last updates - Some of it has moved to 2102. The intention long term is that 3011 becomes a 'how to stress' manual and the 2102 becomes the why/requirements for compliance etc.
Latest 2102 contains this:
There's no rule I can think of that prevents stressing on waybeams specifically. It's more whether the actual design and materials are up to taking the loads, and also account needs to be made of any forces from structural movement as per any bridge.
Indeed, the level ii competence specifically lists stressing on longitudinal timbers.
What version do you have? Latest 2102 is Issue 10. Latest 3011 (was 0011 but that was a good few years back now) is Issue 7.
HTH
Yep. Stressing rules have changed about a bit in the last updates - Some of it has moved to 2102. The intention long term is that 3011 becomes a 'how to stress' manual and the 2102 becomes the why/requirements for compliance etc.
Latest 2102 contains this:
There's no rule I can think of that prevents stressing on waybeams specifically. It's more whether the actual design and materials are up to taking the loads, and also account needs to be made of any forces from structural movement as per any bridge.
Indeed, the level ii competence specifically lists stressing on longitudinal timbers.
What version do you have? Latest 2102 is Issue 10. Latest 3011 (was 0011 but that was a good few years back now) is Issue 7.
HTH
Ploughman
Established Member
Thanks for the reply.
Will need to dig out my book to get the issue.
Been retired a few years now and trying to answer a query for someone.
Will need to dig out my book to get the issue.
Been retired a few years now and trying to answer a query for someone.
mr_moo
Member
No probs. I'm an NR track engineer so should be able to help! Feel free to share the full problem, either on here or via PM if it's not something you want to put on an open forum. Happy to help / advise / ramble!
Ploughman
Established Member
Thanks.
I was A Site Engineer myself until 2010 on Track Renewals
No problems at the moment just debating methods or options.
I do have somewhere an issue from around 2010 - 12 but all I can locate at the moment is a copy of TRK/011 from 2006
I was A Site Engineer myself until 2010 on Track Renewals
No problems at the moment just debating methods or options.
I do have somewhere an issue from around 2010 - 12 but all I can locate at the moment is a copy of TRK/011 from 2006
mr_moo
Member
No probs. Feel free to give me a shout if you want to debate anything. 
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