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blindswelledrat
19,196 posts
102 months
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V8mate said: intrepid44 said:  Let me know what you think! Three years at University. Three years. Three years studying the mechanics of design and materials. I guess two staircases with a walkway between them is... functional.  I thought very similar. OP, do you have to do a design statement? If so, is this roughly how it reads: 1) I copied a picture of a bridge onto my Sinclair ZX Spectrum. I had to exclude any kind of detail due to graphics restraints. 2)Ask my internet mates. They said it was a bit s  t, so I did another 3) THey said that was s t too and needed wheelchair bits. 4)So I stuck some massive long extra bits on it that wheelchairs could use. 5) Ta-daaaaaaaaa
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Monkeylegend
3,283 posts
101 months
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Personally I think it's a bridge to far
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12gauge
1,274 posts
44 months
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Its OK for a cheap design. Id prefer something a little more substantial though, Something that provides shelter from the wind and rain and stops little urchins dropping stuff over the side. Something like this will do nicely. 
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intrepid44
Original Poster
638 posts
70 months
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blindswelledrat said: V8mate said: intrepid44 said: Let me know what you think! Three years at University. Three years. Three years studying the mechanics of design and materials. I guess two staircases with a walkway between them is... functional. I thought very similar. OP, do you have to do a design statement? If so, is this roughly how it reads: 1) I copied a picture of a bridge onto my Sinclair ZX Spectrum. I had to exclude any kind of detail due to graphics restraints. 2)Ask my internet mates. They said it was a bit s t, so I did another 3) THey said that was s t too and needed wheelchair bits. 4)So I stuck some massive long extra bits on it that wheelchairs could use. 5) Ta-daaaaaaaaa More like 20 British and European standards, a 200+ page log book of research and calculations, FEA, correct engineering drawings etc. etc. The design part is only one small aspect of this project.
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V8mate
35,313 posts
59 months
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intrepid44 said: More like 20 British and European standards, a 200+ page log book of research and calculations, FEA, correct engineering drawings etc. etc.
The design part is only one small aspect of this project. Spoken like a true engineer. Fight fire with regulations.
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Vieste
9,198 posts
30 months
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Op are you any good at designing tunnels say 2ft 1ft free flow about 600 metres long ?
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monthefish
15,904 posts
101 months
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blindswelledrat said: V8mate said: intrepid44 said: Let me know what you think! Three years at University. Three years. Three years studying the mechanics of design and materials. I guess two staircases with a walkway between them is... functional. I thought very similar. OP, do you have to do a design statement? If so, is this roughly how it reads: 1) I copied a picture of a bridge onto my Sinclair ZX Spectrum. I had to exclude any kind of detail due to graphics restraints. 2)Ask my internet mates. They said it was a bit s t, so I did another 3) THey said that was s t too and needed wheelchair bits. 4)So I stuck some massive long extra bits on it that wheelchairs could use. 5) Ta-daaaaaaaaa Reminds me of this: 
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davhill
616 posts
54 months
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intrepid44
Original Poster
638 posts
70 months
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V8mate said: Spoken like a true engineer. Fight fire with regulations. Indeed! The number of regulations and codes is staggering, generally these standards are 60+ pages in length and contain such obscure tidbits of information, such as weld fillet radius', prevailing weather conditions and so on. My bridge will meet all of the regulations that I've come across (I think I've covered them all!), and so it could actually be built as a bridge for any railway station without a problem.
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intrepid44
Original Poster
638 posts
70 months
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Vieste said: Op are you any good at designing tunnels say 2ft 1ft free flow about 600 metres long ? I haven't designed a tunnel before, but I don't see it being too difficult, why? What's it for? But I am a Mech Eng student, not a Civ Eng
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Famous Graham
26,541 posts
95 months
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intrepid44 said: My bridge will meet all of the regulations that I've come across (I think I've covered them all!) Yeah, I got that impression.
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intrepid44
Original Poster
638 posts
70 months
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davhill said: Ah... The Tacoma Narrows Bridge! Played in lecture halls to engineering students the world over, to show the improtance of resonance, from what I remember it was the periodic osciliations of the wind adding to the energy in the bridge and eventually causing it to just destroy itself. Mine shouldn't have any of those problems as it's quite a stiff bridge per length unlike a suspension bridge, the only concern of vibration was for the live loads, but even then with my bridge being so stiff per length it isn't an issue, unlike on say the millenium bridge.
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Vieste
9,198 posts
30 months
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intrepid44 said: Vieste said: Op are you any good at designing tunnels say 2ft 1ft free flow about 600 metres long ? I haven't designed a tunnel before, but I don't see it being too difficult, why? What's it for? But I am a Mech Eng student, not a Civ Eng Oh just nothing to be honest, nat west bank needs doing next month  btw police and others that could be reading this i was joking hence the f king >
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Harrytsg
949 posts
32 months
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I havent noticed any lighting?
Are utilities designed to be carried across to avoid costly UTX's?
Is it a modular design, to enable quick assembly across running(?) tracks?
Slip resistance of the surface?
What type of handrails (is this where you hiding the lighting)?
DDA compliance?
No AFA funding from the DfT for lifts?
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Bungleaio
2,938 posts
72 months
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monthefish said: Reminds me of this: That is brilliant!
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1a35
390 posts
78 months
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Bridge-it is an entertaining free download, but i think it needs an Nvidia graphics card to work. Build and test bridges
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Desiato
608 posts
153 months
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intrepid44 said: Indeed!
The number of regulations and codes is staggering, generally these standards are 60+ pages in length and contain such obscure tidbits of information, such as weld fillet radius', prevailing weather conditions and so on.
My bridge will meet all of the regulations that I've come across (I think I've covered them all!), and so it could actually be built as a bridge for any railway station without a problem. Railways also can and do, apply for and get special dispensation to have wider stairs, longer flights etc than regulations 'normally' allow. The main stair at St Pancras is a classic example of this. Far wider (2.4m if memory serves) than normally allowed between handrails. Treads or tread nosings are normally a Nickel Bronze casting insert on the railways, non-slip and very hard wearing (and bloody expensive). Good luck on your project, post up how you get on?
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intrepid44
Original Poster
638 posts
70 months
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Some progress has been made, although a little slower than I wanted it to. I tried to an FEA on the bridge but that has now gone out the window, mostly due to the constraints of the computer, so I'm going to mention about that happening and just do an analysis by hand, which I've nearly finished coincedently. It was a little tricky to begin with and required some reading up/manipulation of the maths, as the Tied arch bridge is indeterminent. Oh and I did some colouring in:  Now I just have to write up my report and make a poster!
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cal216610
7,555 posts
40 months
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Why are those ramps always so bloody long and the worst part is that they always end at the wrong end to where you need to go.
Is it not possible to have a spiral ramp or even a zig zag that end somwhere near where the steps end?
Wheelchairs are much better than they use to be and not as heavy so i don't think those long ramps serve a great purpose.
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Odie
3,702 posts
52 months
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get rid of the ramps and add a platform that rides underneath for DDA like them things that carries cars.
Your a mech eng student you need to add some wheels and cogs and stuff.
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