Subject:
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Building a three-foot bridge
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Newsgroups:
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lugnet.trains, lugnet.znap
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Date:
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Thu, 23 Jan 2003 20:21:21 GMT
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Viewed:
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2899 times
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I want to build a bridge to cross a one-meter gap between two train
platforms. The bridge must hold two straight lengths of track, spaced
with one trackwidth between them (the distance there would be if you
snapped two cross-intersection track pieces together).
The platforms themselves are a meter off the ground, so putting a
support in the middle of the span isn't feasible.
Two years ago I grabbed one of every Znap set from a TRU clearance.
I've been using that to try to build a beam bridge. I've gotten the
beam reasonably rigid, but my problem right now is that it twists very
easily, and I can't figure out how to support against that.
Any tips on how to build a sturdy one-meter-long bridge out of Znap
and/or Technic while being somewhat miserly with the pieces, so I don't
run out? And any tips on how to reinforce against twisting would be
greatly appreciated, thanks!
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Message has 6 Replies:
 | | Re: Building a three-foot bridge
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| (...) ... Brian: I've built some ZNAP and Technic bridges of similar lengths but haven't run into the twisting problem. Any chance you can post a picture of what you have? That would help a lot. Cary (21 years ago, 23-Jan-03, to lugnet.trains, lugnet.znap)
| | | Re: Building a three-foot bridge
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| Here is one photo of my lift bridge that has a 32" span (approximately): (URL) holds up very well, and i assume that you could make it even longer if you needed to. -Rob www.cei.net/~rhendrix/lego.html www.msltc.org "Brian Kendig" (...) (21 years ago, 23-Jan-03, to lugnet.trains, lugnet.znap)
| | | Re: Building a three-foot bridge
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| (...) Well there's Wayne Hussey's bridge which was built out of znap (URL) it's a bit longer than you need, but I imagine it would've been impossible to use if it had a twisting problem. Maybe you could adapt his deck construction technique? Also I (...) (21 years ago, 24-Jan-03, to lugnet.trains, lugnet.znap)
| | | Re: Building a three-foot bridge
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| (...) Well, Brian, I can say one of my 60 inch long ZNAP bridge twisted and collapse at a train show, with the GFLTC (no pics). Two trains fell 30+ inches to the ground out side in the dirt! The best bet for a ZNAP bridge is to support the track on (...) (21 years ago, 24-Jan-03, to lugnet.trains, lugnet.znap)
| | | Re: Building a three-foot bridge
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| Brian, Here's my znap bridge I did. It's pretty sturdy, albeit somewhat heavy as well due to the amount of plates I used on the base.. It's a double 6-wide train bridge. The trick that I did was using the 2x2 brick and half stud pieces combined with (...) (21 years ago, 24-Jan-03, to lugnet.trains, lugnet.znap)
| | | Re: Building a three-foot bridge
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| (...) Hello Brian, The NBLTC has displayed with two such bridges, both made of technic though. The first one is of an arched design and spans 6 straight track lengths. I can vouch for it's strength as my 2 year old daughter tried to walk accross it (...) (21 years ago, 26-Jan-03, to lugnet.trains, lugnet.znap)
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