AAR-RATED CARGO SECURING SOLUTIONS

Rail and Intermodal Compliant Strapping, Lashing, and Dunnage Bags from DunLash

What Is AAR Certification and Why Does It Matter?

The Association of American Railroads (AAR) sets testing and performance standards for cargo securing products used in rail freight and intermodal transport. AAR certification ensures that strapping, lashing, and dunnage bags meet the specific demands of rail transport, including the higher dynamic forces, extended transit times, and harsher handling conditions that rail cargo experiences compared to road-only freight.

In South Africa, rail freight is a critical component of the logistics network, particularly for:

• Mining commodities moving between inland mines and port terminals
• Intermodal container traffic between Gauteng and Durban, Richards Bay, and Cape Town
• Heavy industrial cargo on Transnet Freight Rail’s long-haul corridors
• Agricultural and bulk cargo on dedicated rail lines

AAR-rated products provide an additional level of assurance that cargo securing systems will perform reliably under rail transport conditions, where shunting impacts, coupling forces, and track vibration create forces that standard road-rated products may not withstand.

In addition to our AAR-rated cargo securing solutions, we offer a full range of lashing, strapping, and dunnage bag products. Read more about these product specifications below:

Composite Strapping Specifications
Dunnage Bag Specifications AAR Ratings
Cargo Lashing Equipment Johannesburg
Mining & Heavy Industry Cargo Securing
CTU Code Compliance Blog

DunLash AAR-Rated Product Range

AAR-Rated Composite Polyester Strapping

DunLash supplies AAR-rated composite polyester strapping in our 32mm width (DC 105 AAR). This product undergoes additional testing requirements beyond standard composite strapping and delivers higher breaking strengths.

The double-loop buckle configuration provides the highest system strength in our composite strapping range, making it the preferred choice for rail freight and heavy-duty strapping applications where AAR compliance is required.

AAR-Rated Dunnage Air Bags

DunLash dunnage air bags are available in AAR Level 0, Level 1, and Level 2 ratings. The AAR level determines the construction, pressure rating, and suitability for different transport modes.

AAR Level 2 bags are the recommended choice for rail freight applications. Their higher burst pressure (up to 17psi) and thicker inner bladder (100μm) provide the durability required to withstand the shunting impacts, coupling forces, and extended transit times typical of rail transport.

Why AAR Compliance Matters for South African Rail Freight

• Shunting and coupling impacts — rail wagons experience sudden, high-force impacts during marshalling that can shift unsecured or inadequately secured cargo
• Extended transit durations — rail freight often takes longer than road transport, meaning securing systems must maintain performance over longer periods
• Track vibration — continuous vibration over hundreds of kilometres can loosen standard securing systems not rated for rail conditions
• Regulatory compliance — some cargo types and routes require AAR-rated securing products as a condition of carriage
• Insurance and claims — using AAR-certified products demonstrates due diligence in cargo securing, supporting insurance claims in the event of damage

Applications of AAR-Rated Cargo Securing

• Intermodal containers moving between Gauteng and ports by rail
• Mining commodities and equipment on Transnet Freight Rail corridors
• Steel, timber, and construction materials on long-haul rail routes
• Agricultural bulk cargo moving to port for export
• Any cargo where rail compliance certification is required by the shipper, insurer, or carrier

AAR-Rated Cargo Securing FAQs

Do I need AAR-rated products for all rail freight in South Africa?

Not all rail freight requires AAR-rated products, but AAR certification provides additional assurance for cargo exposed to the higher dynamic forces of rail transport. For heavy or high-value cargo, shippers and insurers often specify AAR-rated securing as a condition of carriage. DunLash can advise on whether AAR-rated products are appropriate for your specific cargo and rail route.

What is the difference between AAR Level 1 and Level 2 dunnage bags?

AAR Level 2 bags are built to a higher specification than Level 1. They have thicker inner bladders (100μm vs 80μm), higher working pressures (up to 5psi vs 2–3psi), and higher burst pressures (up to 17psi vs 8psi). Level 2 is recommended for rail freight and heavier cargo applications.

What makes AAR-rated composite strapping different from standard composite strapping?

AAR-rated composite strapping (DC 105 AAR) is manufactured to meet the additional testing requirements of the Association of American Railroads. It delivers higher linear breaking strength (1,654daN vs 1,465daN for standard DC 105) and is certified for rail and intermodal applications.

Can I use AAR-rated products for road freight as well?

Yes. AAR-rated products exceed the requirements for standard road freight, so they are suitable for any transport mode. If your cargo moves by both road and rail (intermodal), AAR-rated products ensure compliance across the entire journey.

Contact DunLash to discuss AAR-rated cargo securing solutions for your rail and intermodal freight requirements.

Lashing Product Range

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