Choosing tie-down equipment for flatbed cargo can be complex, especially understanding chain grades. Let’s break down these grades, ratings, and strengths to empower flatbed haulers with necessary knowledge.


Understanding Chain Grades

Cargo chains are graded by strength for specific tasks:

Grade 30: Economical and versatile, used in light construction and agriculture.
Grade 43: Stronger than Grade 30, ideal for logging and towing but not overhead lifting.
Grade 70: Commonly used for heavy loads and tough towing, recognizable by yellow chrome finish.
Grade 80: Suitable for overhead lifting and heavy-duty towing due to alloy steel construction.
Grade 100: Offers extra strength for various applications, including overhead lifting.
Grade 120: The strongest chain grade, designed for the most rigorous hauling tasks.

Calculating Grades and Limits

Determining chain grade involves calculating maximum stress per millimeter squared. The formula is:

Chain Grade = Maximum Tensile Force (Newtons) / Link Cross-Sectional Area (mm)²

Adherence to working load limits is crucial for safe hauling and preventing chain failure.



Safety Standards and Regulations

Compliance with safety standards from organizations like NACM, OSHA, and ASTM is essential. Key safety measures include:

Avoiding overhead lifting with unsuitable chains.
Regular inspection for wear and damage.
Adhering to working load limits and safety factors.
By following these standards, flatbed haulers can ensure safe and efficient cargo transport.

Understanding cargo chain grades is vital for flatbed haulers. With knowledge of grades, ratings, and safety measures, haulers can select the right chains for their needs, contributing to safer roads and successful hauls.


PDFComprehensive Guide to Cargo Chain Strength and Grades for Flatbed Haulers