Dfenz Posted April 10, 2012 Twin Iron train bridge designed to carry tracks over gaps at tables at exhibitions Iron train bridges by Dfenz, on Flickr I am aware that other people have used similar trapezoid parts ( http://www.bricklink.com/catalogItem.asp?P=55767 ) for train bridges. This is something I'd planned a few years ago and I was fortunate enough to acquire around 30 of these pieces back then for much lower cost (and from one store) than would be the case today. Its only last weekend that I actually put the pieces into the use they were purchased for. Incidentally those particular pieces can be combined in different ways to make a large roof structure, e.g. for sheds or train stations, if they are turned upside down and rotated about 45 degrees to rest on the angled edge. Share this post Link to post Share on other sites
lightningtiger Posted April 10, 2012 I like it 'Dfenz'....great work, reminds me of the bridge at Murray Bridge, South Australia. Share this post Link to post Share on other sites
JopieK Posted April 10, 2012 Very nice work indeed! Especially the twin version! Share this post Link to post Share on other sites
asleepatheswitch Posted April 10, 2012 Excellent! Looks great I want it!! Share this post Link to post Share on other sites
LEGO Guy Bri Posted April 10, 2012 Sitting on a gold gray mine with so many of those girder pieces! That looks awesome! What length can is span safely? Share this post Link to post Share on other sites
LegoSjaak Posted April 10, 2012 The first time a saw these pieces, i wasn't really enthusiastic... they were not very lego-ish like the nose of the 7897 ICE train...but now that i got some of the pieces....it is nice to make a bridge of it... I did the same thing a few months ago... Greetz, LegoSjaak Share this post Link to post Share on other sites
Piranha Posted April 10, 2012 Very nice bridge Dfenz, those parts are indeed useful for making bridges. I plan on making a similar one for my layout. What is the recommended method to incline track at though? Share this post Link to post Share on other sites
LEGO Train 12 Volts Posted April 13, 2012 This twin version looks really great! Share this post Link to post Share on other sites
1974 Posted April 13, 2012 Looks great Those elements were made for that purpose only. Thanks TLG! Share this post Link to post Share on other sites
JamesP Posted April 14, 2012 Looks great Those elements were made for that purpose only. Thanks TLG! There's an even better Lego element than that for making bridges: Talk about perfect for bridges. It will cross 5 track length gaps at least, that's about all I have of them. James Share this post Link to post Share on other sites
The Blue Brick Posted April 15, 2012 There's an even better Lego element than that for making bridges: Talk about perfect for bridges. It will cross 5 track length gaps at least, that's about all I have of them. James What piece is that? I'm not much of a technic guy. Share this post Link to post Share on other sites
JamesP Posted April 15, 2012 What piece is that? I'm not much of a technic guy. If you property the image, then cut the number & post it into bricklink (that hosts the image), you would have gotten to: http://www.bricklink.com/catalogItem.asp?P=32213 Znap, rather than Technic. James Share this post Link to post Share on other sites
JopieK Posted April 15, 2012 but they are quite rare! old fashioned tech beams with studs also work very well! Share this post Link to post Share on other sites
Rijkvv Posted April 15, 2012 What is the recommended method to incline track at though? Try this topic. Share this post Link to post Share on other sites
The Joker1 Posted April 15, 2012 Nice work. That looks like one strong bridge. Do you know what sort of weight it can hold? Share this post Link to post Share on other sites
JamesP Posted April 16, 2012 but they are quite rare! old fashioned tech beams with studs also work very well! Really? DSC00169 by Peach James, on Flickr I'd have never guessed... (26 sections/11 ft or so long, yes it will self support a 3.5 kg train crossing, but it tends to bend excessively in the centre when I have run it without its centre post) James Share this post Link to post Share on other sites
broomhandle Posted April 26, 2012 Really? DSC00169 by Peach James, on Flickr I'd have never guessed... (26 sections/11 ft or so long, yes it will self support a 3.5 kg train crossing, but it tends to bend excessively in the centre when I have run it without its centre post) James holy crap. any better photos of that? i cant believe a train can cross that. is that support beams under it? way cool!!!!! i love the bridge in the 1st post, just those pieces are so rare and expensive. :( Share this post Link to post Share on other sites
JamesP Posted April 27, 2012 holy crap. any better photos of that? i cant believe a train can cross that. is that support beams under it? way cool!!!!! OK, so some more photos of the large bridge: To answer questions, it will self support up to at least 3.5 kg. However, the flex in the middle is quite shocking when doing so, and the amount of hill the train has to climb is rather excessive. So, by adding the post in the middle, the forces involved are reduced to 1/4th, and the bridge is far more stable. Since version 2 suffered a failure, I was a bit reluctant to test with the full Santa Fe. Instead, I started with a heavily containered train, until I had run rather more weight than the full (6 car/3 engine) Sante Fe was across the bridge without the support pillar. I then ran the Santa Fe across the bridge, without the support pillar, and came to the conclusion that I wasn't that comfortable with the bridge as I had designed it. I am aware that there are some issues with how I built the bridge- the top beam should be the thicker chord, not the bottom one. It is a pre-stressed design, that's what the cables within the bridge are used for. (they compress the bridge, to take some of the flex out of the structure) Version 1, suspension bridge Old Lego bridge by Peach James, on Flickr One of these days, I will rebuild the bridge again. But, since it is workable, there is no pressing need. The yellow end support structures are full of Pennies (perhaps that's why Harper is getting rid of them???) that I am using as ballast to keep them in position. James Share this post Link to post Share on other sites
funkdis Posted July 2, 2012 OK, so some more photos of the large bridge: Version 1, suspension bridge Old Lego bridge by Peach James, on Flickr One of these days, I will rebuild the bridge again. But, since it is workable, there is no pressing need. The yellow end support structures are full of Pennies (perhaps that's why Harper is getting rid of them???) that I am using as ballast to keep them in position. Suspension bridge is held with fishing line? because I cannot see anything Share this post Link to post Share on other sites
LEGO Train 12 Volts Posted July 2, 2012 Wow this is crazy! Share this post Link to post Share on other sites