Viaduct batter

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RylstonLight
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Viaduct batter

Post by RylstonLight » Tue Jun 30, 2020 5:03 pm

Help please.

I am currently building a 5-arch viaduct as a pre-build project for the new Rylston Light. I’ll post on the project board later with build details but I need opinions on the batter of the supporting piers. I have mocked up a pier out of thin card. Have I got the angle of the batter right? Ignore all the polystyrene boxes around; they are just representing the ground levels and filling in for other piers.

I am not sure if the batter needs altering so the base of the pier is slightly thinner. For scale the track bed is 500mm above the ground level. Ol’ Niall Packerman, the PW lengthman, is peering over the balustrade to help with scale.

Thanks for help, and I’ll detail the build on another post later.

Andy
1EA2DD32-021A-41FF-A8CA-75D734108C57.jpeg
F9949C8B-70BA-4809-8D38-E5EE18498315.jpeg
Andy S. at the Rylston Light Railway

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Soar Valley Light
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Re: Viaduct batter

Post by Soar Valley Light » Tue Jun 30, 2020 6:31 pm

Hi Andy,

I'm not sure there's a right answer to this one. I've seen then nigh on vertical before. Your's look sturdy and workmanlike, always a recipe for an acceptable design in my book! Whilst, from a structural stability point of view, the wider the better, it would make the cost of the real thing prohibitive and ultimately they would meet at ground level and prevent access through the arch - at which point you'd have a vertical stone embankment! :shock:

Stick with your excellent work so far, the viaduct looks great.

Andrew
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Re: Viaduct batter

Post by philipy » Tue Jun 30, 2020 6:52 pm

As you've got it, that looks OK to me although if it were mine I think I'd make the foot slightly narrower.
As Andrew says, I'm not sure there is a right or wrong, it would depend on materials i.e. brick or stone, plus the ground type and possibly the qualities of the building stone itself.

The stonework on the bridge itself looks superb BTW.

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LNR
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Re: Viaduct batter

Post by LNR » Wed Jul 01, 2020 1:35 am

Don't know if this is any help Andy and not the best angle to show the lack of taper.
TARADALE VIADUCT 006.jpg
TARADALE VIADUCT 007.jpg
It would seem if you wanted to make them narrow it would be OK.
Grant.
PS can't wait to see the reincarnation of the Rylston Light.

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Re: Viaduct batter

Post by ge_rik » Wed Jul 01, 2020 7:30 am

Arthington viaduct in Yorkshire appears to have vertical supports between the arches with a very slight taper on the outside of each support.
3436273186_ec08d9d263.jpg
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Re: Viaduct batter

Post by ge_rik » Wed Jul 01, 2020 7:38 am

A different shot shows there's no taper on the outer edges
1819px-Arthington_Viaduct_resize_42.jpg
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RylstonLight
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Re: Viaduct batter

Post by RylstonLight » Wed Jul 01, 2020 1:55 pm

Thanks I thought it looked a tad on the fat side. I’ve tried a slimmed down trial in card again. It’s proportions are better. Onwards with the build. I’ll start a build record in the Projects directory.

See you there!

Andy

Edit: A picture of one of the shorter piers with less pronounced batter.
76D9A14A-7C3A-4048-89A1-D0ACC2D52397.jpeg
Andy S. at the Rylston Light Railway

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