ODC:
DEFINITION:

An ODC is found which, when loaded is on the ordinary open wagon, would infringe the maximum moving dimension of the gauge over which is to be moved.

TYPES OF CLEARANCES:

There are two types of clearances:

  1. Net clearance
  2. 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:
  1. Net Clearance is less than Gross Clearance.
CLASSIFICATION OF ODC:

The ODC has been classified into following three categories:

  1. A- class ODC
  2. B- class ODC
  3. C- class ODC
A- 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.

  1. Speed restriction: 40 kmph
  2. Movement: During day & night
  3. Escorting: Not required
B- Class ODC: (Exceptional Out of Gauge)

The load which infringes 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.

  1. Speed restriction: 40 kmph
  2. Movement: During day & night
  3. Escorting: During Night
  4. Escorting Staff: PWI, TI & CWI
C- Class ODC (Extraordinary Out of Gauge) :

The load which infringes 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.

  • Speed Restriction: 15 kmph
  • Movement: During day only
  • Escorting: required
  • Escorting Staff  (JE (P-way), TI, JE (OHE) ):
Note:
  • On the basis of gross clearance C-Class, ODC is further divided into two categories
    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, and TI etc.
  • If net clearance is zero–speed-dead slow, only in day and must be escorted by TXR, PWI, LI, TI etc.
SPECIAL INSTRUCTION FOR THE MOVEMENT OF ELECTRIC SECTION:
AC Traction :

 

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