ediverse

Type to search across standards, messages, tools and glossary.

ediverse Explore the platform

Spotlight PEPPOL BIS Billing 3.0 The EU e-invoicing mandate is here — France Sept 2026, Belgium Jan 2026, Germany 2025.

— 01

Foundations

— 02

Standards

— 03

Flagship messages

— 04

Tools

X12 125 — Multilevel Railcar Load Details

The 125 documents the detailed loading of a multilevel railcar used to transport finished vehicles: positions, VINs, securing.

Purpose

The 125 is the automotive + rail industry instrument to manage multilevels (autorack railcars): each car loads 10-21 vehicles on 2 or 3 levels; the 125 describes who occupies each position (level, position number), with VIN, model, origin plant.

It is part of the AAR (Association of American Railroads) IRIS system and feeds interline finance (car hire allocation). Acknowledged by 997; arrival statuses flow through 214 or 404.

Envelope structure

The 125 travels within the three X12 envelope levels (ISA/IEA, GS/GE with functional group LD, and ST/SE). Didactic example in release 004010:

x12 example-125.x12 
ISA*00*          *00*          *ZZ*FORDPLANT     *ZZ*BNSF           *260514*1000*U*00401*000000125*0*P*>~
GS*LD*FORDPLANT*BNSF*20260514*1000*1*X*004010~
ST*125*0001~
B1*FORDPLANT*LD-2026-0042*20260514*A~
N7*TTGX*620042*A402~
LX*1~
N9*VN*1FTFW1ET5MFA12345~
N9*ZZ*LEVEL-2-POSITION-3~
LX*2~
N9*VN*1FTFW1ET5MFA12346~
N9*ZZ*LEVEL-2-POSITION-4~
SE*10*0001~
GE*1*1~
IEA*1*000000125~

Common segments

  • Header — ST, B1.
  • Wagon — N7 (Equipment: AAR initial, wagon number, ISO size-type A402 = 3-level autorack).
  • Position — repeated LX per vehicle: N9*VN (VIN), N9*ZZ (level + position).
  • Origin — N1*SH (Shipping plant), DTM*002 (loading date).
  • Summary — SE.

Common pitfalls

  • Capacity by type: A402 = 3-level (up to 21 SUVs / 18 trucks), A401 = 2-level. A 125 with 20 vehicles on an A401 is physically invalid.
  • Position 1 to N: position nomenclature varies by OEM (Ford position 1 = end A, GM position 1 = end B); without precision, a sequential unload hits the wrong vehicle first.
  • AAR initials: TTGX = TTX flat car series, ETTX = TTX autorack; mixing initials assigns car hire to the wrong company.

Documentation

The code 125 and the name Multilevel Railcar Load Details are public and listed on x12.org/products/transaction-sets. The complete structure of loops, qualifiers and code lists is distributed by DISA via the proprietary Implementation Guides (TR3). ediverse.io covers only public concepts, the envelope and didactic examples.