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| Type | Commercial Circular |
|---|---|
| Topic | freight |
| Currency | Currency not verified |
f) Speed must be restricted to 15 kmph, when the gross clearance is in between
29
MOVEMENT OF OVER DIMENSIONAL AND OTHER BULKY CONSIGNMENTS
Definition:
Consignments, which when loaded upon a wagon, would infringe the maximum
standard moving dimension, at any point, on the entire route, from the booking
station to the destination, including via break of gauge is called an Over Dimensional
Consignment (ODC). Therefore, any consignment exceeding the dimension quoted
below shall not be registered for booking unless prior sanction for its acceptance has
been obtained from the Zonal headquarters.
Maximum Moving Dimensions from rail level (at any point):
Description
Gauge
BG (MM)
Height at Centre
4115
Height at sides
3505
Maximum Width
3050 for Bogie Wagon
3200 for 4 wheeled Wagon
Note: (i) Above mentioned dimensions includes lashing and packing.
(ii) When a dummy truck is used, the maximum weight that may be loaded, in
any wagon or truck is distinctly marked on each vehicle and must not be exceeded.
Classification of ODC consignment: ODCs are divided into 3 classes according to the
minimum clearance available between the consignment and minimum fixed structure
profile.
Class ‘A’: Those ODC loads, which has a gross clearance of 22.86 cm (9 inches)
and above.
Class ‘B’: Those ODC loads, which has a gross clearance of 15.24 cm (6 inches) and
above, but less than 22.86 cm (9 inches),
Class ‘C’: Those ODC loads, which has a gross clearance of less than 15.24 cm (6
inches) but not less than 10.16 cm (4 inches).
Class Sanctioning Authority
Maximum
Permissible
Sanctioned
Speed
Movement
During Day
or Night
Required to
be escorted
by
A
Within Division : DRM
Inter Division of the same
zone COM Inter Rly.: COM of
the
Zone
and
COM
of
concerned Railway.
Sectional speed
Day & Night
--
B
Local : DRM
Inter Div/foreign Rly.: COM
BG-40 KMPH
Day & Night
TXR
C
CRS
BG-25 KMPH
Day
SE (C&W)
SE(P.Way)
TI
30
Net Clearance:
The net clearance shall be worked out as under:
The net clearance between the consignment as loaded in the train and any fixed
structure should be calculated after making an allowance of 75 mm (3 inches) for
lurch (horizontal) and 7.62 cm (3 inches) bounce (vertical) on the straight together
with following additional factors applicable only when the structure in question is
situated on a curve.
1. Horizontal Clearance:
(a) Allowance for lean due to super-elevation and overhang due to curvature.
The lean should be calculated for that point on the profile of the load which is likely to
have the smallest clearance from fixed structure the formula being :- HC
G
where H = height in feet to the point being considered.
C = Super elevation
G = gauge.
For the central overhang due to curvature, the formula will be:- B2/8R
where B = distance between bogie centre
R = Radius of curve.
In cases where the overhang at the end of a vehicle may have to be calculated by the
formula will be: - L2-B2
8R
where L is the length of the vehicle.
(b) Additional lurch on curves may be taken 38 mm.
Vertical clearance:
In case where the top width of the consignment exceeds the gauge of the track the
vertical tilt should be added to the height of consignment to work out the vertical
clearance from the fixed structure.
Procedure for sanctioning movement of ODC:
When ODC consignment is offered at a station for booking SS/SM will verify if the
consignment exceeds the maximum moving dimension from originating station to
destination station including via. and break of gau
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