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00 Gauge - Jeff Lynn / SRman's New Layout - Members Personal Layouts. - Model Railway Layouts. - Your Model Railway Club
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 Posted: Fri Jan 8th, 2016 03:18 pm
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Longchap
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Hi Jeff,

The new beam looks good under the iron bridge, but that end nearest the camera needs to bear on a structural support. Perhaps extend it so it rests on a pad stone built into the brick abutment? You can add stiffeners and cleats along the length with plasti-card as required and a coat of weathered grey will finish it off a treat.

Good stuff,

Bill :)

 



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 Posted: Fri Jan 8th, 2016 03:19 pm
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SRman
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Thanks for the feedback, Aaron and Ed. Your ideas are very much in line with what I was thinking too. I may have to add a support girder across this end against the brick buttress. I can't add a brick extension there as it would then cause signal sighting problems! Doing that would also provide support on the other side of the bridge, which is cut away a little to allow clearance for the trains, so currently has no visible means of support.

Another idea is to add a little extra layer (or two) of brickwork at that level - a sort of thickening/widening of the wall at the track bed level. I'm not sure of the architectural terms of that.

 
Edit: Sorry Bill. I must have posted this just after you posted - I hadn't read yours when I composed it.



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 Posted: Fri Jan 8th, 2016 03:26 pm
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Longchap
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SRman wrote:
Another idea is to add a little extra layer (or two) of brickwork at that level - a sort of thickening/widening of the wall at the track bed level. I'm not sure of the architectural terms of that.


Corbelling, although probably not sufficient to transfer the heavy loads of the bridge, but hey, rule 1 can apply.

Bill :)



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At 6'4'', Bill is a tall chap, then again, when horizontal he is rather long and people often used to trip over him! . . . and so a nickname was born :)

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 Posted: Fri Jan 8th, 2016 04:31 pm
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SRman
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Thanks Bill.

In actual fact, none of my home-made bridge structures would stand up to a sound engineering study - I try to make them look reasonable representations based on observations of real bridges, although probably none of the real ones are spanning the same gaps and clearances as mine. There have to be a few compromises to suit the tight limits on my space and also my modelling abilities.



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 Posted: Fri Jan 8th, 2016 04:41 pm
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Longchap
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There's nothing lacking in your modelling abilities Jeff, which are well up to any and all challenges and your structures do you credit, so well done and don't stop!

All the best,

Bill :)



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At 6'4'', Bill is a tall chap, then again, when horizontal he is rather long and people often used to trip over him! . . . and so a nickname was born :)

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 Posted: Fri Jan 8th, 2016 05:20 pm
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SRman
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Thanks Bill. :)



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 Posted: Fri Jan 8th, 2016 05:41 pm
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SRman
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Perhaps this is better, with the beam resting "within" the brickwork. I need to blend it better but I think this is an improvement.




I can add a brick support column under the I-beam end and going up to the end of the plate girder too. That would relieve the plainness of the wall as an added bonus.



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 Posted: Fri Jan 8th, 2016 06:30 pm
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Phil.c
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This looks ok Jeff.

Phil



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 Posted: Fri Jan 8th, 2016 07:57 pm
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Longchap
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Perfect Jeff and completely prototypical.

Cheating again Phil, but I like it.

Bill :)



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At 6'4'', Bill is a tall chap, then again, when horizontal he is rather long and people often used to trip over him! . . . and so a nickname was born :)

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 Posted: Fri Jan 8th, 2016 08:30 pm
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Cheating again Bill but PS is a great tool for seeing what works and what doesn't.....before you build it ;-)

Phil



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 Posted: Fri Jan 8th, 2016 09:51 pm
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I assume a retaining column on the end as above, apologies for the terrible '3d' paint drawing



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 Posted: Sat Jan 9th, 2016 01:05 am
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new04db wrote:

I assume a retaining column on the end as above, apologies for the terrible '3d' paint drawing
that is what Ihad in mind,
:thumbs;-):cool:
OWEN



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 Posted: Sat Jan 9th, 2016 05:22 am
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SRman
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That's exactly what I was thinking too. Can you print that out in 3D for me please?  :twisted:  :twisted:

The other side was easier as I didn't have to reduce the I-section to a U-section.






Once again I have 'fudged' it a little with that silly little bit of girder projecting under the end at left. I thought it had to have some sort of support showing.



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 Posted: Sat Jan 9th, 2016 10:31 am
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SRman
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And here it is again from both sides, after a quick, and very rough, coat of grey paint to tone the work down until I am ready for the next stage of detailing. The whole bridge structure lifts off the layout for ease of access when doing such work.





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 Posted: Sat Jan 9th, 2016 12:39 pm
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Looking at your last picture and the bridge in Atlantic Road in the link in post #424, there isn't much difference :thumbs


Ed



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 Posted: Sat Jan 9th, 2016 12:49 pm
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SRman
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A quick link to post #424 http://yourmodelrailway.net/view_topic.php?id=7883&forum_id=21&page=22#p250232



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 Posted: Sat Jan 9th, 2016 02:26 pm
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Longchap
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Yep, I just had them up side by side and they're mirror images. Top modelling, great research, effective teamwork :thumbs  

Bill :)



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At 6'4'', Bill is a tall chap, then again, when horizontal he is rather long and people often used to trip over him! . . . and so a nickname was born :)

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 Posted: Sun Jan 10th, 2016 11:51 am
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SRman
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OK, progress is being made: I have added the support pillar, although it's not quite as square as I would like. I'll leave it in place and see what I think after a while. If I decide I don't like it, I'll work on the mark 2 version. At least this one will be useful as a template.

If I do keep it, I'll add a little corbelling and fill the gaps where it joins the main structure. Don't worry about the white glue - it was still drying wen I took the photos.





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 Posted: Sun Jan 10th, 2016 11:54 am
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 Posted: Sun Jan 10th, 2016 04:09 pm
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makes all the difference, neat
:thumbs:thumbs;-):cool:
Owen



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