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Understanding Chain Grades and Their Applications
Transport chains are classified by grade, which indicates their tensile strength and suitability for load-bearing tasks. The most commonly used grades in equipment hauling are:
Chain Size Selection Based on Equipment Weight
Chain diameter directly affects working load limit (WLL). For example:
Length and Hook Configuration
Chains are typically sold in 20-foot pre-assembled lengths with grab hooks or slip hooks. Pre-assembled chains are often cheaper than buying bulk chain and separate hooks. For versatility:
In the United States, Federal Motor Carrier Safety Administration (FMCSA) regulations require that equipment over 10,000 lbs be secured with at least four tie-downs, each rated to handle 50% of the load. While the Case 1845C falls below this threshold, using four tie-downs is still recommended for redundancy and safety.
Some states may have stricter enforcement. For example, Tennessee DOT inspectors often check for proper chain grade markings and securement angles. Chains must be clearly labeled with their grade, and tensioning devices must be in good condition.
Durability and Practical Advice from Operators
Experienced haulers often prefer 3/8-inch chains not just for strength but for durability and multi-use potential. Smaller chains like 5/16-inch may suffice legally but tend to get bent or kinked more easily, especially when used to secure uneven loads or attachments.
One operator shared that after switching to 3/8-inch chains, he could use the same set for both his skid steer and mini excavator, reducing the need to carry multiple sizes. He also found that larger chains were easier to handle with gloves in cold weather.
Recommendations for New Haulers
Selecting the right chain size for equipment transport is a balance of legal compliance, load weight, and practical durability. For machines around 7,000 lbs, 3/8-inch Grade 70 chains offer the best combination of strength and versatility. While smaller chains may meet minimum standards, investing in heavier-duty gear ensures safer hauls and longer service life.
Transport chains are classified by grade, which indicates their tensile strength and suitability for load-bearing tasks. The most commonly used grades in equipment hauling are:
- Grade 70 (G70): Also known as transport chain, it’s designed for load securement and meets Department of Transportation (DOT) standards.
- Grade 80 (G80) and Grade 100 (G100): These are alloy chains used for overhead lifting and heavy-duty applications. While stronger, they are not required for standard transport unless specified by local regulations or extreme conditions.
Chain Size Selection Based on Equipment Weight
Chain diameter directly affects working load limit (WLL). For example:
- 5/16-inch Grade 70 chain: WLL of approximately 4,700 lbs
- 3/8-inch Grade 70 chain: WLL of approximately 6,600 lbs
Length and Hook Configuration
Chains are typically sold in 20-foot pre-assembled lengths with grab hooks or slip hooks. Pre-assembled chains are often cheaper than buying bulk chain and separate hooks. For versatility:
- Use long chains for flexibility in anchor points
- Keep short chains for securing attachments or auxiliary equipment
- Carry extra chains for unexpected loads or multi-point tie-downs
In the United States, Federal Motor Carrier Safety Administration (FMCSA) regulations require that equipment over 10,000 lbs be secured with at least four tie-downs, each rated to handle 50% of the load. While the Case 1845C falls below this threshold, using four tie-downs is still recommended for redundancy and safety.
Some states may have stricter enforcement. For example, Tennessee DOT inspectors often check for proper chain grade markings and securement angles. Chains must be clearly labeled with their grade, and tensioning devices must be in good condition.
Durability and Practical Advice from Operators
Experienced haulers often prefer 3/8-inch chains not just for strength but for durability and multi-use potential. Smaller chains like 5/16-inch may suffice legally but tend to get bent or kinked more easily, especially when used to secure uneven loads or attachments.
One operator shared that after switching to 3/8-inch chains, he could use the same set for both his skid steer and mini excavator, reducing the need to carry multiple sizes. He also found that larger chains were easier to handle with gloves in cold weather.
Recommendations for New Haulers
- Invest in Grade 70 3/8-inch chains with grab hooks for general transport
- Keep at least four chains on hand for flexibility and compliance
- Inspect chains regularly for wear, rust, and deformation
- Store chains in a dry, secure location to prevent corrosion
- Use ratchet binders or lever binders rated for the chain size
Selecting the right chain size for equipment transport is a balance of legal compliance, load weight, and practical durability. For machines around 7,000 lbs, 3/8-inch Grade 70 chains offer the best combination of strength and versatility. While smaller chains may meet minimum standards, investing in heavier-duty gear ensures safer hauls and longer service life.
