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                                       Counting railchairs
     
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1st message | this message only posted: 29 Jun 2017 17:06
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Richard Spratt
Stockton-upon-Tees, United Kingdom



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I know how to get the total sleeper length.  Is it possible for Templot to tell me how many railchairs I need for each template?  I guess it might be difficult as there are many types of chair, but just a total number would be helpful.  Thanks

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2nd message | this message only posted: 30 Jun 2017 07:06
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Phil O
Plymouth, United Kingdom



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For plain track I double the number of sleepers and for S & C I times it by four, this gives a pretty good ball park figure.

Phil
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3rd message | this message only posted: 1 Jul 2017 21:39
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Richard Spratt
Stockton-upon-Tees, United Kingdom



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Phil, that's ok, but how do I count sleepers? It's not on the info output.
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Phil O
Plymouth, United Kingdom



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Richard

In the info box it gives the number of panels of track and the number of sleepers per panel, plus any additional sleepers for a part panel. Thus you times the number of panels by the number of sleepers ( a 60 foot panel usually has 25 ) so you have 7 panels x 25 sleepers + the odds say 6 so that's 7 x 25 = 175 sleepers in the full panels + the 6 odds = 181 sleepers, you will have to repeat the exercise for each template. For turnout timbering you will have to do each different crossing angle separately so if you have a B6 that will have 30 timbers times the number of turnouts and a C10 will have 40 timbers per turnout times the number of turnouts ETC. ETC.

Phil
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Martin Wynne
West Of The Severn, United Kingdom



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Please do not send requests for help direct to me via email or PM.

Post your questions on the forum where everyone can see them and add helpful replies.
Hi Richard,

For an accurate count you would need to do a detailed chairing design for every template, allowing for partial templates, special switch chairs, special crossing chairs, check rail chairs, etc.

In any event you would need to order more than the minimum to allow for the inevitable losses, breakages, etc. when threading rail -- apart from any last minute design changes.

For plain track templates you can get an approximate count by grouping all the plain track templates (group > create smaller group > group all plain track templates), and then dividing the total group timbering length by the length of your plain track sleepers (34mm for the last 100 years in 4mm scale):



So 55114mm above divided by 34mm = 1621 sleepers.

2 ordinary chairs per sleeper = 3242 chairs.

BUT, big but, that doesn't include any plain track approach and exit tracks in the turnout templates. The total length of timbering in those above is 68820 - 55114 = 13706mm. Dividing that by 34mm will overstate the number of timbers because it should include some longer crossing timbers. But those will require extra chairs, so the end result may not be too far out. It all depends on your track design and number and size of turnouts, etc.

If there are only a few turnouts, you could perhaps go through the design and split off all approach and exit tracks to get an accurate plain track count.

The main intention of the above screen was for those wanting to order rail and timbering strip. No-one has ever asked for a total count of the timbers before -- I will look at adding that in the next program update, and separating sleepers from timbers.

regards,

Martin. 

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