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Manchester Central, CLC & GN Warehouses & Castlefield Viaducts

Manchester Viaducts Castlefield Cornbrook Plastic Structures Warehouses CLC GNR




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#1 Ron Heggs

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Posted 03 January 2011 - 22:21

Index to builds

 

Train Shed - Post #1 >

Cornbrook Viaduct Bridge #1 - Post 40 > http://www.rmweb.co....ducts/?p=302385

Cornbrook Viaduct Bridge #2 - Post 61 > http://www.rmweb.co....ducts/?p=329312

Castlefield Viaduct - Post 357 > http://www.rmweb.co....ducts/?p=392832

GNR Goods Warehouse - Post 1353 > http://www.rmweb.co....55#entry1011150

GNR Deansgate Bridge - Post 1819 > http://www.rmweb.co....73#entry1267161

CLC Deansgate Bridge - Post 2024 > http://www.rmweb.co....81#entry1381053

MSJ&AR Viaduct Bridge - Post 2047 > http://www.rmweb.co....82#entry1395821

 

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Modelling Complex Steelwork Structures in Plastic

All structural steelwork is modelled in plastic

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The dimensions were obtained by reference to historical engineering drawings [The Engineer, February 13, 1880], or scaled from photographs with random survey checks

Each individual structure was drawn on CAD, and checked to confirm dimensional accuracy and buildability, by producing 3D models

MCS-SPAN#2.jpg
The 3D model allowed individual components to be identified and sizes extracted

SpanTieBeams.jpg
Examination of the 3D model also enabled a decision to be made as to the probable order of assemble of complex structures

MCS-SPAN.jpg
Prints of the 2D drawings were produced to be used as templates

The train shed structure comprises 15 bays at 140mm wide i.e. 2100mm plus 100mm for the glazing and canopies with a span of 840mm

The span structures were produced using 60th x 80th strip, curved by pulling between finger and thumb repeatedly until it had a slightly tighter radii than required. This was placed on the template held in position by veneer pins. Additional strips were fixed in place using Mek-Pak

The upper and lower strips were separated by 60th x 80th strip. This completed the core structure

Next the diagonal strips 20th x 100th were fixed on top of the core layer. Removing, turning over and re-placing the present layers on the template, the diagonal strips were fitted to the top face of the layers.

125th Channel extrusions were curved and fixed in the same manner as the top and bottom core strips. The bottom of the top channel was at the same level as the bottom of the top core strip, and top of the bottom channel being fixed at the level of the top of the bottom core strip

The side, underside and top of the span sections below the lowest diagonal strips were clad internally with 20th plastic card

This completed one span structure. Seventeen of these were required

The front and rear gable ends both required two span structures fitted with horizontal and vertical trussing, again using templates

These were then separated by spacers at the A - G levels, and spacers and braces at D & G levels, and also at the transom level on the rear gable

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Front and Rear gable trussing detail - The trial build did not use a template, so some truss members were a bit skew

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Bracing detail and cantilevered walkway supports - The trial build did not use a template, so some truss members were a bit skew

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Original trial assembly - Front gable with high level glazing steelwork

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Original trial assembly - Internal view of Front gable

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Rear gable and transom assembly

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Rear gable showing spacers and bracing

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Rear gable glazing bars structure

The gable glazing was a separate structure produced by overlaying a template. The glazed canopies on the front gable were produced in a similar fashion using 20th microstrip

The structures were spray painted before fixing the glazing sheet to the glazing bars structures, then fixing this to the gable structure

PICT0185.JPG PICT0184.JPG
The transverse beam structures 137mm long, were made in a similar fashion using the relevant template. There are 17 transverse beams in each of the 15 bays. The two gable end bays being shorter by the width of the gable end structures

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Original trial assembly - Overlaying the transverse beams in each bay are 4 I-beams 125th deep curved and spaced at 28mm centres

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Original trial assembly - The front gable has a high level glazed canopy with a timber on steel frame down to the timbered booking & waiting rooms and glazed covered walkway

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Original trial assembly - used to develop material usage and assembly methods


Edited by Ron Heggs, 28 May 2015 - 23:06 .

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#2 Fairburn

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Posted 03 January 2011 - 22:24

Absolutely, bloomin', fantastic.

That is one beauty of a structure.



Ian
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#3 sixteen 12by 10s

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Posted 03 January 2011 - 22:31

wow
thanks for sharing it with us
Gary
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#4 A Murphy

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Posted 03 January 2011 - 22:36

I knew Manchester Central well in the early '60s, my friend Jonathan Whalley and I "drove" one of the station pilots one day. That is staggering modelling sir, I cannot wait to see more!
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#5 Ron Heggs

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Posted 03 January 2011 - 22:44

Further work on the station structure has been suspended since last January when I moved to Spain. Until the Railway Room is completed I am not able to build the baseboard to support the complete station

Work continues on the Station Walls internal/external faces and buttresses. Building of the Castlefield viaducts also continues with additional structural detail being added. Some of the under bridge support steelwork is being modified to match new photograghic details

A number buildings adjacent to station and the approaches are still in boxes, and must wait for future exposure and photographs

Will continue to add images to the gallery and the main topic
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#6 Mucky Duck

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Posted 03 January 2011 - 22:58

Awe-inspiring! :blink: And CAD looks a very useful modelling tool indeed! This magnificent structure alone is worth a whole Model Railway Journal feature. Are you modelling a specific period?

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#7 Ron Heggs

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Posted 03 January 2011 - 23:10

Awe-inspiring! :blink: And CAD looks a very useful modelling tool indeed! This magnificent structure alone is worth a whole Model Railway Journal feature. Are you modelling a specific period?


The general period is 1953 thro' 1965

The original station roof cladding/glazing was replaced in 1952

Station approach trackwork was remodelled and re-signalled in 1958

I do have a few locos outside that time frame, such as LMS 10000, LMS Black 5, Prototype Deltic, etc.

I hope to add a Midland Pullman to the collection when Bachmann delivers late this year
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#8 Horsetan

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Posted 03 January 2011 - 23:37

Absolutely, bloomin', fantastic.

That is one beauty of a structure.


I would add the word "epic" B)

#9 10800

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Posted 03 January 2011 - 23:46

That is simply awesome Ron - thanks for expanding on your gallery photos, I look forward to more in due course.

#10 D9JEF

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Posted 03 January 2011 - 23:57

Fabulous modelling and many thanks for sharing.

How long do you think this has taken so far?

Regards
Jeff

#11 BernardTPM

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Posted 03 January 2011 - 23:59

Beautiful work! Mmmm

#12 Dave47549

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Posted 04 January 2011 - 00:00

Wow. I don't know what to say about this without resorting to cliches. Absolutely stunning.

#13 Kris

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Posted 04 January 2011 - 07:57

That is very very impressive. How robust is the structure?

#14 HerbertHopkins

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Posted 04 January 2011 - 08:21

What a fantastic piece of modelling! I look forward to seeing further updates as work commences - well done.

#15 artizen

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Posted 04 January 2011 - 08:30

This deserves a spot on Buntbahn.de or finescalerr.com

Amazing stuff. And here I am trying to design a "large" span across two tracks that I want to look like a recycled greenhouse with a railway through it.

Please keep posting - layouts like this deserve a very wide and very appreciative audience.

#16 grahame

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Posted 04 January 2011 - 08:42

Wow, fantastic, I'm speachless.................

G.

#17 Richard_S

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Posted 04 January 2011 - 08:54

The station was closed long before it had entered my consciousness, though I am familiar with the structure as a concert venue. Looking at your internal views makes me think of seeing Paul Simon and Chris Rea live. An amazing accomplishment.

#18 richard_t

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Posted 04 January 2011 - 11:03

Modelling Complex Steelwork Structures in Plastic

The dimensions were obtained by reference to historical engineering drawings [The Engineer, February 13, 1880], or scaled from photographs with random survey checks


I can only add to the other comments of absolutely fantastic work!

Do you know where I might be able to get hold of the The Engineer (February and March 1880)? I've got them on "to find list" - I was hoping for an online archive, but if it exists I can't find it.

Cheers, and keep up the good work.

#19 Removed a/c_jim s-w

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Posted 04 January 2011 - 11:12

Good stuff Ron

How long is the station itself? As the roof is 6ft + long is a section to be removable to get to derailments etc?

Cheers

Jim

#20 Peter Bedding

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Posted 04 January 2011 - 11:12

Truly awe-inspiring. Where next, one wonders. Meldon viaduct? Too easy.

PB

#21 David Bigcheeseplant

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Posted 04 January 2011 - 11:29

I am disapointed you have not added the rivets yet!

David
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#22 sixteen 12by 10s

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Posted 04 January 2011 - 11:34

Is there now a world Plastruct shortage?




Gary


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#23 Jason Fisher

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Posted 04 January 2011 - 11:37

That is a work of art, absolutely stunning

#24 iak

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Posted 04 January 2011 - 11:48

Yowser!!! :o
Stunning stuff sir!
And what period is this to be?
To see a few D9's trundling under this roof will be positively wonderful B)

#25 beast66606

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Posted 04 January 2011 - 11:55

And what period is this to be?


A clue only a few posts above.

The general period is 1953 thro' 1965




Echoing what others have said, awesome stuff Ron








Also tagged with one or more of these keywords: Manchester, Viaducts, Castlefield, Cornbrook, Plastic Structures, Warehouses, CLC, GNR

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