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.
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:
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.
The back (road) side is similar but simpler:
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:
But on the whole I think the captures the look pretty well - I'm very happy with the results 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!
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