ODC:- OVER DIAMENSIONAL CONSIGNMENT
10.1 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.
2. 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 393
vi) Floor height : 102 mm
vii) Overall width at bottom : 1600 mm
3. Definition:-
An ODC is found which, when consignment is loaded on ordinary open wagon, would infringe the maximum moving dimension of the gauge over which is to be moved.
4. TYPES OF CLEARANCES:-
There are two types of clearances:-
i) Net clearance
ii) Gross clearance
Net Clearance:- The maximum clearance between consignment & fixed structure on running condition will be known as “Net Clearance”.
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. 394
10.2 CLASSIFICATION OF ODC:- The ODC has been classified in following three categories:-
i. class ODC
ii. class ODC
iii. class ODC
i. Class ODC ( Permitted Out of Gauge):
The consignment load which infringes the maximum moving dimension, but do not infringe any fixed structure en-route by net clearance of 150 mm & above & gross clearance 230 mm & above.
i) Speed restriction : 40 kmph
ii) Movement : During day & night
iii) Escorting : Not required
ii. B- Class ODC (Exceptional Out of Gauge) :
The load which infringe the maximum moving dimension, but do not infringe any fixed structure en-route by net clearance of more than 75 mm &less than 150 mm &gross clearance of more than 150 mm & less than 230 mm.
i) Speed restriction : 40 kmph
ii) Movement : During day & night
iii) Escorting : During Night
iv) Escorting Staff : PWI, TI & CWI 395
iii. C- Class ODC:- (Extra ordinary Out of Gauge)
The load which infringe the maximum moving dimension, but do not infringe any fixed structure by a net clearance of less than 75 mm & gross clearance by less than 150 mm.
i) Speed Restriction : 15 kmph
ii) Movement : During day only
ii) Escorting : required
iii) Escorting Staff : JE (P-way), TI, JE (OHE)
Note: On the basis of gross clearance C-Class ODC is further divided in two categories
a. If net clearance is more than zero but less than 75mm –speed-15 kmph only in day and must be escorted by TXR,PWI,LI,TI etc.
b. If net clearance is zero–speed-dead slow, only in day and must be escorted by TXR,PWI,LI,TI etc.
5. Special Instruction For The Movement Of Electric Section:-
a) AC Traction –
b) DC Traction –
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.
6. 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.
i) Length of consignment
ii) Height of consignment at top center & side
iii) Width of the consignment at top & bottom
iv) Weight of consignment
v) Booking station
vi) Destination station
vii) The route by which the consignment is to be booked
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.
i) 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 397 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.
ii) Construction organization shall submit to CE’s office roll diagram showing supposed clearance before taking any work likely to affect the moving dimension.
iii) 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.
7. 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 398 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 & recode it in the control diary to ensure that the concerned staffs are aware of the condition of movement & their respective duties.
Precautions for the movement of loads with ODC
1. For the movement of ODC, consignor shall submit the particulars of the consignment like – complete measurement, weight, booking and destination stations, mode of loading and unloading, and sketch of the consignment.
2. Proper sanction will be obtained as per extant rules.
3. Such loads shall be carried only on the specified route.
4. Loco yards, goods sheds, transshipment (TP) sheds and high level platform lines are to be avoided.
5. Passenger trains do not carry these ODC consignments.
6. On D/L section, C class ODC shall not be crossed.
7. Unusual consignments that require specially manufactured rolling stock are dealt with separately.
8. Additional precautions are taken for the movement of ODC in electrified section where the minimum clearance required shall be 100 mm between the contact wire and the consignment.
a. 100 mm to 340 mm – Power ‘Off’ and speed 15 km/h; OHE supervisor shall accompany.
b. 340 mm to 390 mm – Power on and speed 15 km/h; and OHE supervisor shall accompany.
c. More than 390 mm – Power on and speed as per rules for classification of ODC.
9. TI, TXR with fitter and 2 khalasis must accompany 132 ton Broad gauge well wagon (BWL) carried by a special train with 6 Guard wagons on either side.
10. The speed of the special train with BWL wagon will be 30 km/h and it shall not be loose or fly shunted and it must not be booked beyond the Indian Territory.
ODC (Over Dimensional Consignment)
ODC / ISMD: Over Dimensional Consignment / Loads Infringing Standard
Moving Dimensions:As per SR 4.28 – 1 to 3.
Loads which infringe standard moving dimensions will not be dispatched without the sanction of the COM (Chief Operations Manager), who will, if necessary obtain the sanction of CRS (Commissioner of Railway Safety) through CE (Chief Engineer).
When Guard wagons are attached due to projections beyond the ends of a wagon, Guard must see that they are not separated from the wagons in which the projected load is placed.
Standard moving dimensions are prescribed to each gauge for safe conveyance of loads so that the load should not come into contact with the fixed structures like Platforms, Signal posts, OHE masts, Bridges and Tunnels etc.
A load can be declared ODC / ISMD depending on its height and width. Any load which exceeds the permissible height / width is called as Over Dimensional Consignment / Infringing Standard Moving Dimensions.
Except under approver special instructions issued by CRS (Commissioner of Railway Safety), no vehicle shall be loaded to exceed standard moving dimensions.
Types: ODC are classified into three types.
ODC Chart:
