9/32" (1/4") x 20 ft Type DOSL 2-Leg Grade 100 Chain Sling - 7400 lbs WLL

DOSL Grade 100 Chain Sling – Double Leg with Master Link & Self-Locking Hooks

The DOSL Grade 100 Chain Sling is a heavy-duty double-leg lifting sling manufactured from premium Grade 100 alloy chain and fittings. This configuration features an oblong master link on one end with self-closing safety (locking) hooks on each leg, providing enhanced load security and positive hook engagement during critical lifts.

We offer online purchase sizes from 7/32" through 3/4", with Working Load Limits ranging from 4,700 lbs up to 61,100 lbs (at 60° or less). Larger chain diameters and higher capacities are available on a per-quote basis for engineered and high-capacity lifting applications.

• Made from Grade 100 alloy chain and fittings – new and certified
• Double-leg DOSL configuration with oblong master link
• Self-closing locking hooks on each leg for maximum load retention
• Ideal for two-point lifting and improved load balance
• Individually serialized and furnished with metal load tag
• Load tag indicates chain size, sling length, Working Load Limit, and serial number
• Designed for demanding industrial, construction, and heavy lifting environments

Why Choose DOSL Grade 100 Chain Slings?

The DOSL configuration combines the stability of a double-leg sling with the added security of self-locking safety hooks. These hooks remain positively engaged under load and must be intentionally released, making them ideal for overhead lifts where safety margins are critical.

Grade 100 alloy chain provides approximately 25% higher Working Load Limits compared to Grade 80 chain of the same diameter — delivering increased lifting capacity without increasing sling weight.

Typical Applications

• Structural steel erection
• Heavy equipment and machinery lifting
• Precast concrete handling
• Industrial plant maintenance
• Critical overhead lifting operations

Frequently Asked Questions

What does “DOSL” mean?
DOSL denotes a double-leg chain sling with self-locking sling hooks on each leg and an oblong master link at the top.

What is the advantage of self-locking hooks?
Self-locking hooks automatically close and remain locked under load, reducing the risk of accidental disengagement compared to standard latch-style hooks.

How does sling angle affect capacity?
Working Load Limits are based on a 60° sling angle. As the sling angle decreases (becomes flatter), tension on each leg increases and overall Working Load Limit is reduced. Always follow proper rigging angle charts and lifting standards.

Are these slings certified?
Yes. Each DOSL chain sling is furnished with a metal load tag showing chain size, sling length, Working Load Limit, and a unique serial number for traceability.

Important Safety Information

• Use only by trained and qualified personnel.
• Never exceed the Working Load Limit.
• Observe proper sling angle limitations — Working Load Limits decrease as sling angles become flatter (below 60°).
• Inspect chain, master link, and locking hooks before each use.
• Ensure locking hooks fully engage and function properly prior to lifting.
• Remove from service if damage, deformation, or overloading is suspected.

Need a custom double-leg sling assembly with locking hooks or higher-capacity configuration? Contact us for engineered lifting solutions tailored to your application.