Subject:
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Re: SCLTC enters final two weeks at SDMRRM; Pictures!
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Newsgroups:
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lugnet.trains.org.scltc
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Date:
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Wed, 4 Jan 2006 16:48:25 GMT
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Viewed:
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7136 times
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In lugnet.trains.org.scltc, Eric Sophie wrote:
> Awesome display! When I think SCLTC, I think of great layouts like this!
>
> Hey cool, I didn't know (you had or there were) two of those white cable span
> bridges. Amazing.
..
Eric-
Thanks for the comments.
The cable-stayed bridge was built as two 60-inch spans that we can separate if
desired. For this display, we modified them so that their decks can tilt
relative to their towers. This allows each bridge to provide 8 bricks of
elevation change over 192 studs of length.
In fact, for this cloverleaf over-and-under layout, all the elevation changes
(20 bricks up, 20 bricks down) are done on bridges. The advantage of using
bridges is that we don't terraform the space below them, which saves a ton of
work (and bricks).
Still, we needed more bridge for this layout so we built two 192-stud long
under-truss bridges. The under-truss bridges went together very quickly (except
for waiting on some parts) and are the strongest we have ever made: They take a
bowling ball in dead center with deflection of only about 1/8th inch!
-Ted
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