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Norwood Road Bridge: ironwork


Will Vale

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James Hilton suggested a while ago that I'd not really be able to avoid scratchbuilding the bridge if I wanted it to look like Whitemoor - and he's right. Given that I'd done the abutments I thought I'd have a go at the girder.

 

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The above picture is just a quick test - I need to remove some material from the deck so it can sit further back, and there's a fair bit of cleaning up to do as well. Unfortunately I didn't take many work-in-progress pictures this time, although here's one of attaching the framing (should be riveted) to the bottom row of panels:

 

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The basic shape is cut from 1mm styrene sheet. The real bridge has what appears to be a 'stepped' plate girder with two different kinds of gusset on the upper section. It also has a slight curve, although I chickened out and used three straight lines rather than a complete curve - I think this is fair enough since that's what I thought was going on the first few times I looked at the picture :) I cut the blank along the dividing line and put it back together with a 2mm step, fitted a 3mm strip to this for the horizontal web, then added *lots* of gussets from 0.5mm Evergreen sheet and strip. So far so good.

 

I also found some pictures of similar bridges, and the road side of Norwood Road bridge, which suggested that each panel has rivetted strips around the inside. I didn't think I was up to doing rivets (how?) but the strips were a possibility. Lots and lots of 0.75x0.25mm strip later, it was possible to clean up and fit the top and bottom webs, cut from sheet styrene for a change.

 

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The back (road) side is similar but simpler:

 

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It's a bit messy still - the framing was all measured in-place, and some of the gussets are a bit shallow - this cruel close-up shows some gaps which need filling:

 

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But on the whole I think the captures the look pretty well - I'm very happy with the results :D I was worried that reducing the length would make the proportions look off, but I tweaked the height a bit as well and I think it sits OK with the span and the abutments. Civil engineers may of course beg to differ!

 

Piece count so far: 60 for the basic bridge, plus another 108 for the framing around the panels!

8 Comments


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That's looking very nice Will. This will make an impressive entry to the yard. Thanks for posting he pictures and explaining the process you used. I think that the evergreen strips are great as time savers.... and you've put them to very good use here. I look forward to seeing the final result.

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Very neat piece of work Will. Certainly got lots more character than a generic girder.

 

Cheers

Dave

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I believe you can get rivets as transfers! Check out one of Pugsleys posts/blogs - I can't remember what he was using them for - they were an American product I think?

 

However - even without the rivets it looks superb! Well worth the effort. You're making me look like a slacker - I keep putting off my road overbridge and now I'm thinking of the next layout I'm struggling with motivation. This has certainly helped Will, thanks for sharing! :)

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Rivets can be obtained from Archer Transfers http://www.archertransfers.com/. Various sizes and pitches available and although they are in the states they will arrive in no time. When I ordered a sheet last I couldn't believe how quick it was - 3days/ No Tax.

 

The only thing I would recommend is using Microsol and Set on their application and once laid up use minimal handling until you are ready to paint.

 

They are defo worth the effort

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Thanks for all the kind comments! I'm really glad I built it - a good return on the 4-6 hours spent so far. It was made a lot easier by knowing that I didn't have to make a second identical one :D

 

The problem with adding rivets now is that they have to fit onto 0.75mm wide strips - I'm not sure I could manage this with slices of rod, although the transfers might be a possibility. The site suggests they would fit, although it has the feel of a fiddly job. One option would be to add them to the road side where I have good photographic evidence (Google Street View) and they'd be easy to get to, although I imagine they'd be on the other side as well.

 

I strongly suspect I'll just chicken out and leave it though - the deadline looms, and all that :(

 

 

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Looks great Will

 

Is the girder resting on brick though?

 

Cheers

 

Jim

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Only temporarily! I've since cut a slice out of the balsa deck behind the girder so it can sit further back.

 

It's a good point though - I can't figure out what the girder/abutment interface is - it's about 1 pixel in the picture, and appears to be the same buff as the concrete/mortar used to finish the domed area on the central pillar. I certainly can't see any sign of expansion rollers or other hardware.

 

 

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