2nd Dunblane footbridge

Any aspect related to the structures and equipment on the Caledonian Railway Company.
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jimwatt2mm
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Joined: Fri Nov 16, 2012 5:36 pm

2nd Dunblane footbridge

Post by jimwatt2mm » Thu Oct 04, 2018 9:51 pm

Another question on Dunblane. At the north end of the island platform was a path leading to a footbridge spanning the loop and the entrance to the goods yard and leading over to the west side of the town.
north footbridge.JPG
north footbridge.JPG (40.77 KiB) Viewed 12850 times
Originally it was a standard CR wooden structure as seen in the centre of this photo,
Dunblane 16.JPG
Dunblane 16.JPG (56.18 KiB) Viewed 12850 times
but by the 60's it had been replaced by the lattice bridge almost completely obscured by steam in this photo https://www.railscot.co.uk/img/46/124 . Can anyone help with either a better photo(s) or further information on the later bridge. Are there any drawings of a similar bridge which could be used as a basis for a model of this one?

Any help gratefully received.

Jim W

jim mac
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Re: 2nd Dunblane footbridge

Post by jim mac » Fri Oct 05, 2018 8:36 am

Jim
My only photograph showing the footbridge is the came as yours, but the attached might help:
Footbridge drawing.jpg
Footbridge drawing.jpg (60.52 KiB) Viewed 12838 times
Inchture footbridge.jpg
Inchture footbridge.jpg (47.74 KiB) Viewed 12838 times
If you need a better copy of the drawing let me know and I will email it.
I very much admired your recently completed model of the other Dunblane footbridge.
jim mac

jimwatt2mm
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Re: 2nd Dunblane footbridge

Post by jimwatt2mm » Fri Oct 05, 2018 8:45 am

Thanks, Jim, but it's the lattice bridge which was there in the 1960's that I'm interested in. I think there was a drawing of the timber bridge at Cleghorn in either the or the HMRS Journal some years ago. Even drawings or photos of a similar lattice bridge would be helpful.

Jim W

jim mac
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Re: 2nd Dunblane footbridge

Post by jim mac » Fri Oct 05, 2018 12:42 pm

Apologies Jim I should have read your post more clearly
Attached is from the Specification for the L&A railway which is in the CRA Archive. I don't know how standard it was across the whole CR, but might give you a starting point.
Overbridge L&A.jpg
Overbridge L&A.jpg (112.5 KiB) Viewed 12824 times
jim mac

jim mac
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Re: 2nd Dunblane footbridge

Post by jim mac » Fri Oct 05, 2018 1:11 pm

An internet search results in the following images which might help:
Kingussie footbridge.jpg
Kingussie footbridge.jpg (9.88 KiB) Viewed 12823 times
Aviemore.jpg
Aviemore.jpg (9.54 KiB) Viewed 12823 times
Addiewell footbridge.jpg
Addiewell footbridge.jpg (13.71 KiB) Viewed 12823 times
jim mac

jimwatt2mm
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Re: 2nd Dunblane footbridge

Post by jimwatt2mm » Fri Oct 05, 2018 4:27 pm

Thanks for these, Jim.

I'm off to the 2MM Scale Association AGM in Burnmoor tomorrow and then on holiday from next Thursday so I'll study these when I get home, along with any other information anyone can provide.

Jim W

John Paton
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Re: 2nd Dunblane footbridge

Post by John Paton » Wed Oct 17, 2018 6:44 pm

Jim,

Here is a photo of the later bridge.

John
Attachments
Dunblane 1961 Norris Forrest compressed.jpg
Dunblane 1961 Norris Forrest compressed.jpg (102.63 KiB) Viewed 12594 times

jimwatt2mm
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Re: 2nd Dunblane footbridge

Post by jimwatt2mm » Wed Oct 17, 2018 6:48 pm

Many thanks for that, John. I'm on holiday at the moment, but will get a good look at it when I get home. Looks to be an excellent basis for a guesstimate if nothing better friends up.

Jim W

Graham R
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Re: 2nd Dunblane footbridge

Post by Graham R » Fri Oct 19, 2018 11:38 am

Jim,

The National Records of Scotland has a drawing of a footbridge at Dunblane which was renewed in 1922. The plan reference is RHP127189. This is described as "Hand coloured drawing showing elevation, plan and section for renewal of footbridge at 123 miles 23 chains at Dunblane". It might be the one you're looking for, since you've established that the original wooden Caley footbridge was renewed.

Does anyone have the line mileages from Carlisle to see if this corresponds to the north end of Dunblane station? The sectional appendices only give distances between signalboxes unfortunately, not the line mileages.

regards
Graham

caley739
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Re: 2nd Dunblane footbridge

Post by caley739 » Fri Oct 19, 2018 1:08 pm

Graham
This might be a roundabout way, but from the WTT for Summer 1907 mileages are;
Carlisle to Glenboig 96miles 45chains.
Buchanan St. to Glenboig 8miles 76chains.
Buchanan St. to Dunblane 35 miles 10 chains.

Working through these figures I make it Carlisle to Dunblane 122 miles 59 chains. (80chains to the mile from dimly remembered skooldays?) Advisable to check my arithmetic !! and I'm not at all sure where the measuring point is for through stations.I hope this is useful.

Tom Robertson

Graham R
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Re: 2nd Dunblane footbridge

Post by Graham R » Fri Oct 19, 2018 9:26 pm

Tom, your arithmetic is spot-on as far as I can see. (Full disclosure: I had to try twice to get it right!). But I also realised the 1:1250 O.S. maps actually give the milepost distances. They give the 123 milepost as being a little south of the South signalbox, and the 123¼ milepost at the north end of the platform, where Jim's bridge is. So 123 miles 23 chains sounds correct and the drawing must be of the footbridge Jim W. is looking for.

I wonder what happened to the missing 44 chains, comparing your WTT distances to the mileposts on the ground?

Graham

jimwatt2mm
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Re: 2nd Dunblane footbridge

Post by jimwatt2mm » Sat Jan 26, 2019 9:57 pm

Just a brief update on this. The drawing Graham identified turned out to be for the plate girder footbridge 100yds or so further north, nearer the North Signal box. It's therefore back to estimations of photos and details from the drawing of the L&A bridge above. I've been able to get a couple more photos from a contact at the Armstrong Trust which show the bridge and I've sent a PM to John asking for a higher resolution copy of the photo he posted. I'm currently working on an outline drawing.

Jim W

jimwatt2mm
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Re: 2nd Dunblane footbridge

Post by jimwatt2mm » Sat Feb 16, 2019 5:14 pm

As a further update on this project, following receipt of a more legible scan of the drawing Jim Mac posted earlier and a higher quality copy of the Norris Forrest photo John Paton posted, I have been able to produce a drawing which, in the general consensus of those involved, is as near as we are going to get. I have also had profession advice from civil engineer Alisdair Campbell. Here is the result.
2nd footbridge Drawing.pdf
(175.8 KiB) Downloaded 376 times
Apologies for the multicolours, it's down to the way I do the drawings in different layers so that I can separate out parts when I come to create the etching artwork. Tracks and ground level are in black, supporting pillars are in green, framing in blue, lattice work in red and steps and deck in grey. the span is a little longer than the original, but that is needed to fit the site on the model.

I'm now in the process of creating the artwork.

Thanks to all who have helped me get this far.

Jim W

jimwatt2mm
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Re: 2nd Dunblane footbridge

Post by jimwatt2mm » Wed Apr 10, 2019 9:45 pm

As an update to this project, here is the drawing I prepared for this bridge. it's the best guess we can come to and is adjusted slightly to suit the track plan.
2nd footbridge Drawing.pdf
(175.8 KiB) Downloaded 288 times
The various colours are to help me work out the layers for the etch.

The sheet, including it and a number of other things, went off to PPD ten days ago and I received an email this evening to say that it had been dispatched.

In due course, for anyone who is interested, I will be posting details of its construction here https://www.rmweb.co.uk/community/index ... er-layout/.

Jim W

jimwatt2mm
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Re: 2nd Dunblane footbridge

Post by jimwatt2mm » Wed Apr 17, 2019 9:31 pm

Work has now started on the etch with the first steps illustrated in a post in the link above for anyone who is interested.

Jim W

jimwatt2mm
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Re: 2nd Dunblane footbridge

Post by jimwatt2mm » Mon Jul 08, 2019 6:31 pm

Following receipt of the turned pillars from Roy at the Perth show, construction of the model is now complete and it awaits painting.
Assembled #1 web.JPG
Assembled #1 web.JPG (65.17 KiB) Viewed 5276 times
More photos at https://www.rmweb.co.uk/community/index ... nt=3607528 , with details of the build in the preceding posts.

My thanks to all those who helped with information for this project.

Jim W

jimwatt2mm
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Re: 2nd Dunblane footbridge

Post by jimwatt2mm » Sat Jul 13, 2019 8:02 am

For anyone whose remotely interested, the painted bridge model can be seen in another post in the link above.

Jim W

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