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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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| | Re: My newest creation, Hell Gate Bridge NY
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(...) 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 (...) (24 years ago, 11-Dec-00, to lugnet.trains)
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| | 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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| | 48x144 (was Re: My newest creation, Hell Gate Bridge NY)
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(...) Correction - that should be 48x144 grey "brick" It's the height of a brick, but there's no holes on the bottom. SRC StRuCtures (24 years ago, 12-Dec-00, to lugnet.trains)
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| | Re: My newest creation, Hell Gate Bridge NY
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(...) You could probably make a larger truss - yes - but a suspension bridge will always be able to be made longer - and from less LEGO. The counterweight and bending tower problem is easily fixed at the same time the span length is increased. ie. (...) (24 years ago, 12-Dec-00, to lugnet.trains)
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