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D6256 – Standard Test Method Technical Guide
📐 Overview and Scope
This specification, ASTM D6256/D6256M-16, covers the fabrication of new wood-cleated shipping boxes with skidded, load-bearing bases. Designed for nonregulated domestic and overseas shipments, these boxes handle loads under 2500 lb [1134 kg] and lengths not exceeding 16 ft [4877 mm]. The standard defines multiple types, styles, and classes to address varied performance demands, but it does not cover all atmosphere, handling, shipping, or storage conditions.
⚠️ Important: Regulated commodity shipments may require more robust packaging than specified here. Consult CFR Parts 107–180 for hazardous materials regulations.
Alternative construction methods are permitted if they yield packaging systems of equal or greater performance, as validated through the distribution cycle in Practice D4169. Values in inch-pound and SI units must be used independently; mixing units may cause nonconformance.
⚙️ Construction and Performance Requirements
Boxes must be fabricated from components ensuring adequate strength and load-bearing capacity. The standard permits alternative methods if performance parity is achieved. Key specifications include fasteners per Specification F1667 and wood quality per Practice D6199. All materials must conform to the referenced ASTM and AWPA standards for preservatives like copper naphthenate (AWPA P36) and oxine copper (AWPA P37).
| 🟦 Parameter | 📏 Inch-Pound | 📐 SI Units |
|---|---|---|
| Maximum Load | 2500 lb | 1134 kg |
| Maximum Length | 16 ft | 4877 mm |
💡 Best Practice: Treat wood packaging materials per Practice D6253 and use AWPA-approved preservatives to ensure durability in shipping environments.
📖 Referenced Standards and Materials
This standard relies on several ASTM and industry specifications to ensure consistent performance. Key references are listed below, covering terminology, packaging practices, testing, and fasteners.
| 🟦 Standard | 🎯 Purpose |
|---|---|
| D996 | Terminology of Packaging and Distribution |
| D3951 | Commercial Packaging Practice |
| D4169 | Performance Testing of Shipping Containers |
| F1667 | Driven Fasteners (Nails, Spikes, Staples) |
Additional references include AWPA Standards P36 and P37 for wood preservatives, and CFR Parts 107–180 for regulated shipments.
❓ Frequently Asked Questions
🔍 What are the maximum load and size limits?
Boxes covered by this specification are limited to loads under 2500 lb [1134 kg] and lengths under 16 ft [4877 mm], per Section 1.1.
💡 Are alternative designs allowed?
Yes, as per Section 1.3, alternative construction methods are acceptable if they provide equal or better performance than the prescribed materials and procedures.
⚡ What testing is recommended for validation?
The standard recommends using the distribution cycle from Practice D4169 to verify performance under typical shipping conditions.
📌 Do hazardous material rules apply?
Regulated commodities may require enhanced boxes; refer to 49 CFR Parts 107–180 for compliance with Hazardous Materials Regulations.