Railcar Engineering and Inspection

Where railcar design and railcar analysis meet.

Railcar Engineering Services

Let us modify your unused railcar types for new services: from bulkhead flat conversion to mill gondola or coal hopper conversion to mill gondola, we can convert one railcar type to another to satisfy railcar market demand.

New railcar design


AAR approved freight railcar modifications and conversions


Freight railcar body and component analysis


Increase gross railcar load: modify 100-ton cars to 268K or 286K

Railcar Inspection

 DJJ provides innovative railcar inspection services to meet your needs

What we engineer


With over 30 years in the rail industry, DJJ can engineer railcar modifications, components and complete railcar designs to meet your needs. From initial concept to AAR approval and prototype construction, we can handle all aspects of your project.

  • Aggregate
  • Grain
  • Lumber
  • Steel
  • Paper
  • Wood chip
  • Covered hoppers
  • Open-top hoppers
  • Box cars
  • Flat cars

Inspection services include

  • Coordinate third party inspections
  • Independent lease return analysis
  • Due diligence, prior to purchase
  • UMLER/Electronic Health Monitoring System (EHMS) Analysis
  • Early warning/maintenance advisory
  • Preventative maintenance and audit

We inspect for

  •  Box
  • Cement
  • Sand
  • Plastics
  • Grain
  • Center beam
  • Wood chip
  • Coal


  • Log
  • Steel open top hoppers
  • Aluminum and steel coal
  • Aggregate
  • Mill gons
  • Coil
  • Bulkhead flat cars
  • Banks
  • Private equity firms
  • Leasing companies
  • Repair shops
  • Railroads
  • Other shippers
  • Logistics
  • Supply chain vendors