Templot Club Archive 2007-2020                             

topic: 3259Way-beams
author remove search highlighting
 
posted: 19 Apr 2018 16:13

from:

richard_t
 
Nr. Spalding, South Holland - United Kingdom

click the date to link to this post
click member name to view archived images
view images in gallery view images as slides
Hi



A recent photograph on ebay showed that on my chosen prototype where a road went under the station the track was on way-beams. I know little about way-beams, so I wonder if I could ask the following:



(These are for bullhead rail)



What would the longest beam be, and if the section of track was longer, would the joints in the way-beams be staggered. The track is straight in all cases in my chosen prototype where it's on way-beams.



Would any rail joints be on the beams? I've seen on the MOD document that rail joints shouldn't be within 4m of the end of the way-beams.



It seems there are cross beams (for want of a better term), between the way-beams every 4 or 5 chairs. Does this seem right and was there a fixed size for the beams?



Finally, on one of the platform roads where the under bridge goes under there's a couple of turnouts. I don't have photographs of this area, but I'm guessing these wouldn't be on way-beams?  



When the station was relaid with flat bottom rail, I think the way-beams where all removed, but I think I'd like to keep them, as it would add a little interest.



Thanks in advance





Richard

posted: 19 Apr 2018 18:35

from:

Phil O
 
Plymouth - United Kingdom

click the date to link to this post
click member name to view archived images
view images in gallery view images as slides
I am unable to have a look on Google Earth,to check, but most if not all the railway bridges over the Thames in London were on way beams.

Phil.
Last edited on 19 Apr 2018 18:36 by Phil O
posted: 20 Apr 2018 14:34

from:

Judi R
 
Sutton-on-Sea - United Kingdom

click the date to link to this post
click member name to view archived images
view images in gallery view images as slides
Longitudinal timbers are used where vertical clearances are tight because they save the depth (and weight) of the ballast. They are directly fastened to the steel bridge beams so it's difficult to adjust alignment and are usually tolerated only where necessary in slow speed areas. Yes, I know there are high-speed exceptions. The long timbers are usually 12" x 12" and sometimes bigger, up to 18" x 18", and the cross timbers - the transoms - are usually around 6" x 6" and are paired with a steel tie rod to strap the whole lot tight to hold the gauge.

Judi R
Last edited on 20 Apr 2018 14:35 by Judi R
posted: 4 May 2018 10:44

from:

richard_t
 
Nr. Spalding, South Holland - United Kingdom

click the date to link to this post
click member name to view archived images
view images in gallery view images as slides
Thanks Judi that was a great help.  I've found a bit of further information in the NERA "Standard Railway Equipment, Permanent Way, 1926" booklet, diagram 107.

It has three arrangements, S1J chairs on 18" beams, L1CC chairs on 18" beams, and M1 chairs on 12" beams. For 60' rails, these chairs are all placed at 2' centres.  Looking at the picture it seems to be M1 chairs, as there's no checkrail visible, and M1/L1 are distinct enough from S1J chairs.

On diagram 107 there are two "chairings", with the 2nd chairing showing the use of a saddle chair (either S1 for S1J/L1CC arrangement, or M1 for the M1 arrangement) under the fishplate. This looks most interesting, so I knocked up these renders.

499_040542_180000000.png499_040542_180000000.png
499_040543_250000000.png499_040543_250000000.png

posted: 4 May 2018 17:13

from:

Andrew Barrowman
 
USA

click the date to link to this post
click member name to view archived images
view images in gallery view images as slides
So that's why they are called bridge chairs!

Nice 3D model. Are you going to have it printed?

Cheers!
Andy

posted: 5 May 2018 10:33

from:

Judi R
 
Sutton-on-Sea - United Kingdom

click the date to link to this post
click member name to view archived images
view images in gallery view images as slides
That's a beautiful picture! Only one niggle, I believe the fishplate bolts should be placed with the heads in the 4-foot.

Judi

posted: 5 May 2018 20:12

from:

Rob Manchester
 
Manchester - United Kingdom

click the date to link to this post
click member name to view archived images
view images in gallery view images as slides
Judi R wrote:
That's a beautiful picture! Only one niggle, I believe the fishplate bolts should be placed with the heads in the 4-foot.

Judi
Judi,
I thought that at first but had a niggle that maybe in this situation there may be reasons for putting the bolts the opposite way to normal. Despite a concentrated look through many books/pictures I haven't found any evidence of this :( The main conclusion I came to was that I didn't have many pictures of rails on bridges !

Rob


posted: 6 May 2018 13:24

from:

richard_t
 
Nr. Spalding, South Holland - United Kingdom

click the date to link to this post
click member name to view archived images
view images in gallery view images as slides
Judi is correct - I blame my summer cold :-(



about Templot Club

Templot Companion - User Guide - A-Z Index Templot Explained for beginners Please click: important information for new members and first-time visitors.
indexing link for search engines

back to top of page


Please read this important note about copyright: Unless stated otherwise, all the files submitted to this web site are copyright and the property of the respective contributor. You are welcome to use them for your own personal non-commercial purposes, and in your messages on this web site. If you want to publish any of this material elsewhere or use it commercially, you must first obtain the owner's permission to do so.
The small print: All material submitted to this web site is the responsibility of the respective contributor. By submitting material to this web site you acknowledge that you accept full responsibility for the material submitted. The owner of this web site is not responsible for any content displayed here other than his own contributions. The owner of this web site may edit, modify or remove any content at any time without giving notice or reason. Problems with this web site? Contact webmaster@templot.com.   This web site uses cookies: click for information.  
© 2020  

Powered by UltraBB - © 2009 Data 1 Systems