Subject:
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Re: My newest creation, Hell Gate Bridge NY
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Newsgroups:
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lugnet.trains
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Date:
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Mon, 11 Dec 2000 21:53:54 GMT
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Viewed:
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1270 times
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In lugnet.trains, John Matthews writes:
> The yellow Technic bridge is a bow truss. It is not an arch.
> Truss members are either in tension or compression and truss joints
> are assumed to be pinned or hinged. An arch works in compression.
See, this is what I get for going into Comp.Eng. instead of Civil. :-)
So unless I'm mistaken, (and yes it happens all too often) Arne's, (and
James') and all of Ben's are all various examples of bow truss bridges.
All the more reason to get "T1" built I guess. The glue is drying now
on part of it - the 32x96 grey "brick" baseplate. Here's a tip - don't
try to use bare hands with the metal lid of a rubber cement brush in an
un-heated garage when it's minus 27 degrees outside/inside the garage. ;-)
In lugnet.trains, Reinhard "Ben" Beneke writes:
> In lugnet.trains, Larry Pieniazek writes:
> > ...I mean that huge huge suspension arch he built.
> That would be this one:
> http://www-public.tu-bs.de:8080/~rbeneke/lego/bridges/pic02.jpg
Yes - A beauty - When the Guiness PNLTC stuff was going on with
that massive suspension bridge I commented that Ben's was the
longer _pure_ LEGO bridge because (I forget his name) used string.
Nothing wrong with that - it's a suspension bridge - of course it's
going to use string. For longest LEGO bridge, it's probably always
going to be a suspension bridge - just the nature of bridges.
> http://www-public.tu-bs.de:8080/~rbeneke/lego/event_3/pi196.jpg
Mmmm - Outdoor LEGO train layouts - <more drool> - Mmmm - very nice.
SRC
StRuCtures
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Message has 2 Replies:
 | | Re: My newest creation, Hell Gate Bridge NY
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| (...) Thanks! :-) When the Guiness PNLTC stuff was going on with (...) Yes, I agree, but you need a foundation or a masive ballast, because the strings try to tilt the pillar. The bow bridge has the advantage to stand on two points (or lines in (...) (24 years ago, 11-Dec-00, to lugnet.trains)
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Message is in Reply To:
| | Re: My newest creation, Hell Gate Bridge NY
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| The yellow Technic bridge is a bow truss. It is not an arch. Truss members are either in tension or compression and truss joints are assumed to be pinned or hinged. An arch works in compression. All of the bridges mentioned are cool! Build On! John (...) (24 years ago, 10-Dec-00, to lugnet.trains)
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