Prototypical track dimensions

Discuss the prototype and how to model it.
ben mason
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Joined: Thu Dec 11, 2014 12:17 am

Prototypical track dimensions

Postby ben mason » Thu Mar 02, 2017 3:51 pm

One thing in particular I would be grateful if someone can confirm for me is the standard gap between parallel tracks for example running through a station with two platforms. One thing I can remember from the distant past is the "six foot way", but is that the normal distance between the tops of the inner rails?

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martinm
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Joined: Sun Jul 20, 2008 5:49 pm

Re: Prototypical track dimensions

Postby martinm » Thu Mar 02, 2017 5:42 pm

Ben,
If you search for images of 'railway structure gauge' you will have a load of info.
These show minimum clearances on straight track. curved track is a whole new ball game :?
regards,
martin

Winander
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Joined: Thu Mar 20, 2014 12:19 pm

Re: Prototypical track dimensions

Postby Winander » Thu Mar 02, 2017 6:46 pm

Ben,

Digest 62 has oodles of info that may be of help.
https://www.scalefour.org/members/diges ... -0v1-2.pdf

regards
Richard Hodgson

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grovenor-2685
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Re: Prototypical track dimensions

Postby grovenor-2685 » Thu Mar 02, 2017 7:28 pm

but is that the normal distance between the tops of the inner rails?

The simple answer is yes, that is the standard dimension for straight double track on most of the UK network.
So you get track centre to centre of 11'2" made up of:
Half of gauge, 2'4.25"
Width of rail, 2.75"
Six foot, 6'
Width of rail, 2.75"
Half of gauge, 2'4.25"
TOTAL, 11'2"
There are lots of exceptions, 10ft intervals when more than 2 tracks, obstructions, substandard clearances in congested areas, ex GW broad gauge etc.
But the above dimensions covered the vast bulk of the UK network and are still the standard today in metric form.
Regards
Regards
Keith
Grovenor Sidings

ben mason
Posts: 45
Joined: Thu Dec 11, 2014 12:17 am

Re: Prototypical track dimensions

Postby ben mason » Fri Mar 03, 2017 3:46 pm

Thanks that's very helpful, I will start to lay out my run-round loop with a bit more confidence! Regards, Ben :)

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Martin Wynne
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Re: Prototypical track dimensions

Postby Martin Wynne » Mon Mar 06, 2017 2:20 am

grovenor-2685 wrote:
but is that the normal distance between the tops of the inner rails?

The simple answer is yes, that is the standard dimension for straight double track on most of the UK network.
So you get track centre to centre of 11'2" made up of:
Half of gauge, 2'4.25"
Width of rail, 2.75"
Six foot, 6'
Width of rail, 2.75"
Half of gauge, 2'4.25"
TOTAL, 11'2"

Just to throw a tiny spoke in that, on GWR and BR(W) lines it is 6ft-6in to the gauge-face of the rails.

So the total is 11ft-2.5in track centres, 1/2" wider than elsewhere. This is legacy from the days of 6ft way with rails 3" wide.

Martin.
40+ years developing Templot. And counting ...

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steamraiser
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Joined: Thu Dec 31, 2009 4:49 pm

Re: Prototypical track dimensions

Postby steamraiser » Mon Mar 06, 2017 10:49 am

Also I believe you could have a wider gap between two GWR lines where the track was originally laid in broad gauge.

Gordon A


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