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posted: 30 Dec 2019 09:51 from: johndon
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I'm in the final stages of shoving timbers for my layout and would appreciate some advice on the timbering shown below. My feeling are that the red timber is too long but, given it's position, I can't see any other way of doing it. If it helps in terms of timbering practice, the track was originally laid by the NER but was likely to have been renewed by BR by the time period of my layout. Templot-1.jpg |
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Last edited on 30 Dec 2019 09:52 by johndon |
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posted: 30 Dec 2019 15:38 from: wcampbell23
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Have you considered changing the timbering of the turnout just above the crossing to equalized - incremental as shown in the menu below? 54_301036_520000000.jpg This may give you enough elbow room to use shorter timbers. Regards. Bill Campbell. |
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Last edited on 30 Dec 2019 16:11 by wcampbell23 |
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posted: 30 Dec 2019 17:25 from: alan@york click the date to link to this post click member name to view archived images |
Here the timbers cross 1 1/2 tracks... an option for you.1953_301223_560000000.jpg | ||
Last edited on 30 Dec 2019 17:26 by alan@york |
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posted: 30 Dec 2019 21:13 from: Phil O
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I have seen spliced timbering, where the two halves have been joined with a fishplate chair screwed to the two halves. Phil |
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Last edited on 30 Dec 2019 21:14 by Phil O |
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posted: 1 Jan 2020 09:40 from: FraserSmith
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Further to Alan's picture above, the arrangement below might satisfy your requirements. Alternate timbers are laid with gaps between ends. The gaps are in the four foot of a running line and one of the crossing lines. 3137_121655_330000000.png HTH Fraser |
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posted: 1 Jan 2020 10:18 from: johndon
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Thanks for all the suggestions. John |
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posted: 1 Jan 2020 19:27 from: Martin Wynne
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Hi John, That 25ft timber is not necessarily too long. Most companies kept timbers up to about 20ft as stock items. That's enough to span a double-track crossover, etc. Longer timber up to about 30ft would be ordered as specials from the timber yard, as needed. But they were expensive, so used only on heavy-traffic areas such as the throat of a main-line station or at an important junction. Elsewhere two shorter timbers might be used end-to-end, with the gap in the 4-foot of the least-used road, as in Alan's and Fraser's pics. Sometimes for extra strength and resistance to gauge-spread they might be half-spliced together, with an old fishplate bolted on as a splint, as Phil suggests. The downside to that, apart from the need for some skilled on-site carpentry, is that it exposes the untreated end-grain of the wood. Even under pressure the creosote penetrates only about an inch. Plenty more would be sploshed on the splice, but it doesn't soak in far. The result is that the spliced timbers will likely rot from the joint, needing to be replaced before the surrounding ones. Where a pointwork complex includes diamonds or slips (which always have equalized timbering), the adjacent turnouts are often also laid with equalized timbering, as Bill suggested. Equalized timbering is always easier to arrange for the chairing -- in earlier versions of Templot equalized was the default. I changed it because so many folks kept telling me it was wrong (it wasn't of course, the timbering style depends on the site conditions). Now that Peco have introduced their 00 bullhead turnouts with equalized timbering, folks have gone quieter about it -- perhaps I should change it back? The truth is that neither is right or wrong, it needs to be set for each turnout as the situation demands. Which makes setting a switch-on default a difficult call. cheers, Martin. |
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posted: 1 Jan 2020 23:10 from: Andrew Barrowman
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alan@york wrote: Here the timbers cross 1 1/2 tracks... an option for you.1953_301223_560000000.jpgNice pic Alan! There's a pretty long gap there without much to maintain gauge. I wonder if that's OK? Also, the check rail is held in the chairs by springs rather than wedges but maybe it's OK if they are that type of spring? It also looks like there are no wedges or springs in the wing rail chairs next to the vee. Cheers, Andy |
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posted: 1 Jan 2020 23:17 from: alan@york click the date to link to this post click member name to view archived images |
1953_011818_400000000.jpgAnd here's the model - still under construction, showing the timbering used. a@y |
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Last edited on 1 Jan 2020 23:18 by alan@york |
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