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The white panels below the platform?

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Harbon 1

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Can anyone tell me what the white panels, fixed to the side of the platform with the red sliders are for

Cheers, matt

Ps. I'll post a picture later if nobody knows what I'm on about!
 
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Wyvern

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From the other thread:

They are called 'Datum Plates'. They are used to moniter the relative movement of the track in relation to adjacent structures.
Top left number is the number of the datum plate, one below is is the Lateral Offset to the plate. i.e. The distance, in milimeters, from the structure to the running edge of the rail. The next one denotes the line. UM = Up Main, etc.
At the bottom is the designed cant of the track.
They are only used when the track runs closer than 3m from a structure, not on all electrified lines as mentioned above. If the plate was fitted with a Red slider, it shows the track condition at the moment the plate was installed, where as if it was Green it would show the designed track possition.
Where a route hase ABT (Absolute Track Geometry) the whole route must be fitter with datum plates, and the slider will always be green.
Hope this helps.
 

OxtedL

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Check out this: http://www.railforums.co.uk/showthread.php?t=46479
Yup, it's a datum plate.

The "switch" to which you refer is moved up or down (originally) to show the track level, and does not switch.

Check out any of the previous threads on this.

Try http://www.railforums.co.uk/showthread.php?t=44972 or http://www.railforums.co.uk/showthread.php?t=41255

Or http://www.railforums.co.uk/showthread.php?t=20924 .

Or http://www.railforums.co.uk/showthread.php?t=39072 .

Or http://www.railforums.co.uk/showthread.php?t=28790 .
:D
 

ralphchadkirk

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Can we please have an explanation of this stickied? This question seems to pop up every month or so.
 

Noguidedbus

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Answered a question I have pondered for 20 years before I got around to asking it. If only the rest of life was as simple.
 
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