Physical Address
304 North Cardinal St.
Dorchester Center, MA 02124
D5728-12 – Standard Test Method Technical Guide
ASTM D5728-12 (Reapproved 2020), titled “Standard Practices for Securement of Cargo in Intermodal and Unimodal Surface Transport,” provides a critical framework for shippers, carriers, and consignees. It establishes safe and effective practices for load planning, loading, blocking, and bracing across various surface transport modes under the jurisdiction of Subcommittee D10.25 on Palletizing and Unitizing of Loads.
📐 Scope and Application of the Standard
This standard applies to cargo in surface transport on flat bed, open top, box car, truck, van, and intermodal containers. It is designed as a guiding framework, relying on a comprehensive bibliography of source materials for specific implementation details. The standard explicitly excludes hazardous materials, bulk cargo, non-containerized break bulk in ocean carriage, and all cargo transported by air.
| 🟦 Transport Mode / Cargo Type | 📋 Status under D5728 |
|---|---|
| Flat Bed, Open Top, Box Car | ✅ Included |
| Truck, Van, Intermodal Containers | ✅ Included |
| Hazardous Materials | ❌ Excluded |
| Bulk Cargo / Non-containerized Ocean Break Bulk / Air Cargo | ❌ Excluded |
📖 Key Terminology and Definitions
The standard references Terminology D996 for general packaging and distribution environment definitions. However, it establishes specific operational terms critical to interpreting and applying the securement practices.
| 💡 Term | 🎯 Definition (per ASTM D5728) |
|---|---|
| Blocking | Restraining the movement of lading via securement to or at the floor using wood, metal, or other materials. |
| Bracing | Restraining the movement of lading via securement above the floor using wood, metal, or other materials. |
| Break Bulk | Verb: to unload and distribute contents. Noun: individually packaged load, often in LCL or LTL shipments. |
| Bulk Cargo | Freight not in packages (explicitly excluded from the scope of these practices). |
⚙️ Framework for Safe Cargo Securement
D5728 acts as the foundational guide for load planning. It does not attempt to provide comprehensive detail for every specific cargo type. Instead, it directs users to authoritative source materials, including the Association of American Railroads (AAR) Circular No. 43 (Rules for TOFC/COFC Service) and the Intermodal Loading Guide, as well as other ASTM guides like D4675 for flat strapping materials.
✅ Best Practice Tip: This standard is designed to form a framework. For specific cargo types, users must consult the referenced AAR and ASTM publications (e.g., D4675 for strapping, AAR Loading Guides) to obtain detailed technical methods for safe cargo transport.
⚠️ Safety Responsibility: Per Section 1.4, this standard does not address all safety concerns. It is the user’s responsibility to establish appropriate safety, health, and environmental practices and to determine the applicability of all regulatory limitations prior to use.
The practices apply comprehensively to both intermodal transport (containers moving via rail, truck, and ship) and unimodal transport (single surface mode). The methodologies are intended to ensure effective load planning, execution, and unloading operations throughout the entire surface transport chain.
❓ Frequently Asked Questions
🔍 What is the primary purpose of ASTM D5728?
Its purpose is to serve as a guide for shippers, carriers, and consignees for load planning, loading, blocking, and bracing of intermodal and unimodal cargo. It provides a framework by referencing a bibliography of detailed source materials rather than specifying every technical detail.
💡 What is the operational difference between “blocking” and “bracing”?
Per the definitions in Section 3.2, blocking specifically refers to restraining the movement of lading via securement at the floor, while bracing refers to restraining movement above the floor. Both utilize materials like wood or metal to prevent cargo shift.
⚡ Which transport modes or cargo types are excluded from this standard?
The standard explicitly excludes hazardous materials, bulk cargo (freight not in packages), non-containerized break bulk cargo in ocean carriage, and all cargo transported by air. It is strictly focused on surface transport modes.
📌 Is ASTM D5728 sufficient on its own for developing loading procedures?
No. Section 1.3 clearly states it is intended to form a framework and does not provide comprehensive detail for specific cargo types. Users must consult the detailed referenced standards, such as AAR Circular No. 43 and ASTM D4675 (Guide for Flat Strapping), for specific technical data and procedures.