STC/KPA
OVER DIMENSIONAL CONSIGNMENT
INTRODUCTION:-
The transport of over dimensional consignment has increased considerably in
recent years. It has therefore become necessary to give wide publicity to the procedure in
vogue on the railway for arranging movement of such consignment. This circular should be
read in condition with the railway boards instructions issued from time to time & should be
understood by all the staff responsible for movement of oversize consignment.
MAXIMUM MOVING DIMENSIONS:-
i) Overall height at top centre : 4115 mm
ii) Overall height of OHE from rail level : 4470 mm
iii) Overall height at the side : 3505 mm
iv) Overall width of eight wheeler : 3250 mm
v) Overall width at maximum level at
top center : 610 mm
vi) Floor height : 102 mm
vii) Overall width at bottom : 1600 mm
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STC/KPA
Definition:-
Any consignment, which when loaded upon a wagon, would infringe the maximum
standard moving dimension that may be either in length, width and height, 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).
TYPES OF CLEARANCES:-
There are two types of clearances:-
1. Net clearance
2. Gross clearance
1. Net Clearance: - The maximum clearance between consignment & fixed structure on
running condition will be known as “Net Clearance”.
2. Gross Clearance: - The net clearance between consignment & fixed structure in stationary
condition is known as “Gross Clearance”.
NOTE: Net Clearance is less than Gross Clearance.
CLASSIFICATION OF ODC:-
The ODC has been classified in three categories according to the minimum clearance
available between the consignment and minimum fixed structure profile.
I) A- class ODC
II) B- class ODC
III) C- class ODC
I) ‘A’ Class: The consignment which has a gross clearance of 9 inches and above from the fixed
structures and infringes the standard moving dimensions, is classified as A-Class ODC.
a) Sanctioning Authority : Within Division - DRM
Inter Division of the same zone - COM
Inter Railway - COM of the zone and COM of concerned Rly.
b) Speed restriction : En route -- Sectional Speed
Yard, turn out stations – 8 kmph
While passing fixed structures – Dead slow
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c) Movement : During day & night
d) Escorting : Not required
II) ‘B’ Class: The consignment which has a gross clearance of 6 inches and above from the fixed
structures but below 9 inches, is classified as B-Class ODC.
a) Sanctioning Authority : Within Division - DRM
Inter Division / Foreign Railway - COM
b) Speed restriction : En route -- 40 kmph
Yard, turn out stations – 8 kmph
While passing fixed structures – Stop/move
c) Movement : During day & night
d) Escorting : During night
e) Escorting Staff : TXR
III) ‘C’ Class: The consignment which has a gross clearance of less than 6 inches from the fixed
structures but not less than 4 inches, is classified as C-Class ODC.
a) Sanctioning Authority : CRS
Speed restriction : En route -- 25 kmph
Yard, turn out stations – 8 kmph
While passing fixed structures – Stop/move
b) Movement : During day
c) Escorting : Required
d) Escorting Staff : SSE(C&W), SSE(P.WAY) and TI
General Instruction:
If any package before loading exceeds the following dimensions, the party concern should be
advised to apply the COM of the zonal railway for sanction for the movement of the
consignment.
a) Length : 13716 mm
b) Height : 2745 mm at centre
c) Width : 2997 mm
d) Top width : 610 mm
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STC/KPA
On receipt of the loading instructions from the COM, the consignment should be
loaded on a suitable truck should be lashed and packed properly to avoid shifting of the
consignment enroute during transportation.
The greatest weight on any pair of wheel shall not exceed for which the wheel is
designed and the weight should be eventually distributed as far as possible on two rails.
After loading, the consignment should be measured in the following manners:
a) Maximum height of the consignment from the rail level.
b) Overall width: Overall width means, after loading of the consignment, both sides to be
measured from the center of the truck. The overall width is the double the amount of greater
side measurement.
c) Overall width where height is maximum.
d) Height where width is maximum.
The measurement should be taken by a competent C&W supervisor and should be
sent to COM for getting sanction for classification of load, and route through which it will pass.
Before dispatch of the load, fit certificate must be obtained from C&W supervisor. All ODCs
must follow the routes selected by the COM.
Loco yard, Goods shed and transshipment shed must be avoided for transportation
of ODC. Shunting must also be avoided. If any shifting take place, the consignment should be
brought to proper place and again it will be properly lashed and packed for its safe running.
PROCEDURE FOR VARIFICATION IN CE’s OFFICE:-
The following particulars shall be furnished in duplicate by the COM’s office to the
Chief Engineer’s office in respect of nay over sized consignment.
Length of consignment
Height of consignment at top center & side
Width of the consignment at top & bottom
Weight of consignment
Booking station
Destination station
The route by which the consignment is to be book
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STC/KPA
In case of old consignment a sketch showing end & front elevation with the complete
dimension Length, width, Height & Weight shall be sent along with the application in duplicate.
Each division will send up to date rolling diagrams showing the moving dimension on
the division by 30th September of every year to the Chief Engineer’s Office. Clearance of OHE
structure (height of contact wire, horizontal distance of OHE, columns etc.) shall be submitted
by the traction branch of the division to the chief engineer’s office. Thereafter CE’s office must
be advised to receive the diagram whenever the clearances etc. are affected to rising of track,
construction of new structure & alternation of existing structure etc.
Construction organization shall submit to CE’s office roll diagram showing supposed
clearance before taking any work likely to affect the moving dimension.
While under taking any construction work, such as extension of existing platform,
construction of new platform, shelters, road over bridge etc. Whether by open line or
construction branch, it must be ensured that the clearance as shown in the Chief Bridge
Engineer.
SANCTIONING BY CHIEF ENGINEER’s OFFICE:-
After verifying the particulars of the consignment vis-à-vis the moving dimension,
sectional movement of the consignment will be communicated by the chief engineer’s office to
the COM’s office. Such cases which are not within the powers of the chief engineer’s office
shall be submitted to CRS for sanction by the chief bridge engineer & as soon as he sanction for
the movement is received from the CRS, the same shall be communicated to the COP by the
chief engineer’s office.
In each case section will specify the speed restrictions to be observed, the track &
structures to be avoided, lowering of track, lifting of over head electrical equipment, shutting
off of power etc. as necessary. COM’s office will convey the sanction to the divisions & the
division concerned shall be issue massage to all concerned official by wire & in case the
movement over a particular division is through locations where restrictive unavoidable
structures or over head equipment are located, in addition will send conformation copies &
obtain acknowledgment. If acknowledgement is not received in time from any of the
concerned officials it shall be the duty of the divisional control office to obtain in on telephone
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& recode it in the control diary to ensure that the concerned staffs are aware of the condition
of movement & their respective duties.
SPECIAL INSTRUCTIONS FOR THE MOVEMENT OF ELECTRIC SECTION:-
1. AC Traction –
Sl. No. Gap Between Contact Wire & ODC Speed Power
1. 390 mm & above 40 kmph ON
2. Less than 390 mm & till 340 mm 15 kmph ON
3. Less than 340 mm & till 100 mm 15 kmph OFF
2. DC Traction –
Sl. No. Gap Between Contact Wire & ODC Speed Power
1. 245 mm & above 40 kmph ON
2. Between 245mm & 170 mm 15 kmph ON
3. Between 170 mm & 75 mm 15 kmph OFF
Note: If Clearance is between OHE wire & consignment is less than 100mm in AC traction
area and less than 75mm in DC traction areas movement of ODC is not possible.
Precautions for Movement of ODCs in 25 kV ac Electrified Sections:
The following precautions must be observed for transport of ODCs in the electrified
sections:
1. Movement of ODC shall be undertaken only after sanction of competent authority has been
obtained.
2. In all cases where ODC is to be moved, staff accompanying the ODC shall remember that the
OHE is 'live' except when a power block has been obtained from the traction officials. Even
when a power block has been obtained, all lines other than those for which the power block
has been granted are to be treated as 'live' at 25 kV.
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3. The following are the prescribed clearances from contact wire for the passage of ODCs
through electrified sections and the special restrictions required :
a) Special speed restriction is not required when the gross clearance is more than 390 mm.
b) Speed must be restricted to 15 km/h when the clearance is between 390 mm and 340
mm.
c) Speed must be restricted to 15 km/h and power to OHE must be switched off when the
clearance from the contact wire is less than 340 mm.
4. No consignment with less than 100 mm clearance from the overhead contact wire will be
permitted in a 25 kV electrified section.
5. A representative of the OHE section should accompany all ODCs having clearances as
specified in items 3 (b) and 3 (c) of item (3) above, to supervise safe movement of the ODC at
locations where clearance from the contact wire is critical.
6. A representative of the OHE section should also accompany ODCs having width more than
1981 mm for BG (and 1910 mm for MG) from centre line of track.
7. Section Controller and Traction Power Controller must coordinate while an ODC moves in
electrified section in order to ensure that OHE masts are not damaged at locations where
the clearance is critical.
8. A list of structures where the clearances are restricted in the electricfied section and also the
clearance, available under the over-bridges should be with the Section Controller and TPCs.
9. To facilitate checking of clearance from the Contact wire for over-dimensioned
consignments, the Operating and Engineering branches at the Divisional and Headquarter
level should have with them up-to-date charts showing location of the minimum height of
contact wire and clearances of OHE structures in the electrified section. The Operating
Department may permit movement of ODCs on the basis of clearance checked with the help
of the above mentioned charts subject to the speed restrictions. However, when sanction of
CRS is required to be obtained for movement of any particular ODC, a specific reference
should be made to CEE and a certificate cobtained from him in the following form:
"Certified that the minimum height of contact wire on the section over which the
consignment is to move is not less than......except at the following locations where restrictions
as indicated below should be observed" :
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Section Location Height of Power "ON" or Speed
contact wire 'OFF' Restriction in
km/h
1 2 3 4 5
Power Blocks for Movement of ODC:
When an ODC is permitted to be moved in an electrified section with the OHE power
off. It will be the responsibility of the Section Controller to arrange with the TPC for power to
be cut off before admitting the ODC into the section. An authorised representative of the
Traction Distribution Branch will obtain confirmation from TPC by message supported by
private number that power has been switched off and then issue a memo to the Guard or
other traffic official incharge of the train to the effect that power has been switched off over
the specified section. Only on receipt of such memo may the train carrying the ODC be allowed
to enter the section.
Note. Since such a memo is not a "permit-to-work", earthing of the OHE is not necessary.
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