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Yet another bridge

April 7th, 2013 by RoscoHead

Yet another bridge

Here is another bridge I built a while ago. It’s been used quite a few times on M>ltc layouts, and I decided it was time for it to retire.

It’s quite a simple one, and really follows on from my last Cable Stayed Bridge, using similar techniques, but with a much different result. The most interesting attribute is that it is mounted directly on the floor, removing the need for any lowered table.

The main support is a hollow 4×4 stud tower, encasing a 2×2 stud technic rod. At appropriate places along the length, technic pins attach to 1×1 technic bricks, which are held in the outer casing. Because LEGO is not 100% perfect, this actually results in the technic rod being under tension, and thus makes the tower very strong while allowing it to flex, similar to pre-stressed concrete.

The deck sections are basically the same as the previous version, except the cable attachment points were moved to the centre. The deck does flex quite noticeably when trains cross, but there hasn’t been any failure.

Anyway, for those interested, there’s some more photos in my flickr account.

A new bridge

April 26th, 2010 by RoscoHead

A new bridge

A new bridge

Well OK it’s really an old bridge but I only just got around to taking photos. It’s a cable-stayed bridge loosely based on the Batman Bridge near Launceston Tasmania. Read all the info here.

2 new BRE bridges

November 17th, 2006 by RoscoHead

These 2 bridges were ultra quick builds for M>ltc’s last layout.

Sandstone road bridge The first is a sandstone road bridge, to provide a link for the country people to get to town. It is a simple arch bridge, with 2 traffic lanes, and footpaths on either side. It is very simple in construction, but surprisingly sturdy.
Sandstone road bridge The second is a short trestle bridge, to carry the high level train line. The construction is fairly simple, except for the curves required at each end. They initially posed some problems, but they were solved with the help of Teunis, our artistic director.

A third bridge was also constructed to carry the main lines across the river, but that was a much larger project, and will be documented fully in a subsequent article.

Bridging Sydney

October 24th, 2006 by RoscoHead

It’s back! Better than ever!

Read the rest of this entry »

Another nice looking bridge

May 7th, 2005 by RoscoHead

Duane Collicott is progressing on a nice looking cable-stayed bridge, you can read more about it here.

One day I should probably try a proper big suspension bridge, but I want to be able to use it in our train layout, so it will require a fair amount of planning, and probably multi-level tracks. Oh well, one day…

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