Templot Club Archive 2007-2020                             

topic: 2138Maximum length of timbers in turnouts etc
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posted: 13 Jan 2013 10:01

from:

Richard_Jones
 
Heswall - United Kingdom

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Hi,

Happy New Year to all Templot users....

With the start of track building for Singleton I am getting quite confused as to how the turnout timbers would have been arranged, specifically between the turnout and three way that abut either end of the double slip - also the practicalities of making the assembly as three separate items - there are only 7 timbers between the v of the slip and the turnout in each case - any suggestions as to how it would have been done in practice? (and the best way in model form?) (Station built by the LBSCR in 1880 - model will be set as SR about 1930)

many thanks for any thoughts

Richard
Attachment: attach_1557_2138_Singleton_Templot2.box     267

posted: 13 Jan 2013 11:04

from:

Martin Wynne
 
West Of The Severn - United Kingdom

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Hi Richard,

Crossing timbers were normally available to designers in lengths from 8ft-6in (or previously 9ft in pre-grouping times) in increments of 6in up to 30ft. The very long timbers were expensive, and different companies had different rules about how many could be used. Some were very sparing with long timbers. Comparing an LNER drawing for a crossover with a GWR equivalent, you can see the latter used far more long timbers and produced much more heavily-timbered formations generally.

Sometimes where a long timber was required it was made up on site by halving and splicing two shorter ones, using bolted-through fishplates top and bottom as stiffeners.

For a single turnout, the usual rule was that crossing timbers stop at 16ft* length, after which normal sleepering is used, with the sleeper ends interlaced as necessary. Timbers up to that length would normally be held as a stock item by the railway company, longer timbers being ordered from suppliers as needed.

*17ft for GWR renewals before about 1930.

Here's an example of very long timbers used in a complex formation:

long_timber_shoving.pnglong_timber_shoving.png

(the longest timber in the above is 26ft-6in).

There are lots of topics on here about timbering layout, see for example:

topic 394

topic 1153

topic 1610

topic 1109

regards,

Martin.

posted: 13 Jan 2013 11:48

from:

Richard_Jones
 
Heswall - United Kingdom

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Hi Martin,

Thanks for your help - I try working up to the 30' length and see what looks right - given the trouble I've had finding photos of the prototype I don't think anyone will be able to disprove whatever I do!

best wishes

Richard



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