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Subject: 
Re: Building a three-foot bridge
Newsgroups: 
lugnet.trains, lugnet.znap
Date: 
Fri, 24 Jan 2003 13:51:05 GMT
Viewed: 
3089 times
  
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 plates (if you didn't know, those holes in znap are the
same size as technic pins).  If you insert one of those bricks into the znap
holes on one side of the znap, then insert another one on the second or
third set of holes, you can bind the two bricks with a 6-wide plate, which
will almost eliminate twisting of the znap.  This trick works even better
when you can sandwich it at a joint. The nice thing is that when you do it
this way, the plate will lay right on top of the znap as well.  My bridge is
about 100-110 studs long (about 3.5 baseplates, which puts it at about 32-35
inches long.  I think that's pretty close to the roughly 40 inches that
equals a meter.  The 2x2 bricks are hidden from view because they are on the
underside of the base.

http://www.brickshelf.com/cgi-bin/gallery.cgi?i=105239

here's the start of a road bridge I've now completed (completed pics not up
yet).  The key thing in making it straight was balancing the weight against
the two baseplates that the ramp is connected to.  The bridge now
accomodates three elevated sections, and doesn't sag unless you put a large
load of weight on it (Like one of Stacy Bledsoe's Big Boy trains)...even
then, after 8 hours overnight, it sagged about an inch (or so he told me)

http://www.brickshelf.com/cgi-bin/gallery.cgi?i=202614

However, making two towers at each platform and running cables from the
towers down to the bridge (like Wayne's) does look like a cool idea.

Scott Lyttle



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!



Message is in Reply To:
  Building a three-foot bridge
 
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 (...) (21 years ago, 23-Jan-03, to lugnet.trains, lugnet.znap)

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