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Transcribed from the June 1922 edition , email
(1,000—W. 192-7-22).
Great Western Railway.
 
INSTRUCTIONS.
 
Superelevationor “Cant.”
Expansion ofRails.
Gauge andChecking of Curves.
 
W. W. GRIERSON,
Chief Engineer.
Paddington,
         June,1922.
p.2SUPERELEVATION OR “CANT.”
To be given to the Outer Rail inCurves ranging from 6 to 200 Chains Radius.
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Offset
(Length of
Cord 66 ft.)
Radius
of
Curve.
Minimum “Cant.”
Maximum “Cant.”
 
 
Outer rail
to be raised.
For a
maximum
speed of
Outer rail to
be raised.
For a
maximum
speed of
Inches.
Chains.
Inches.
miles per hr.
Inches.
miles per hr.
16½
6
3¾
20
6
25
10
10
3½
25
5⅛
30
6⅝
15
3⅜
30
4⅝
35
5
20
3½
35
5¾
45
4
25
2¾
35
4⅝
45
3¼
30
3
40
4¾
50