What is the proper way to attach two slings together?

• A. Weld them
• B. Use a shackle
• C. Tie knot
• D. Attach with tape

Answer: (B)

The way to join two slings is to use a proper connector that is rated for lifting, such as a shackle. A shackle provides a secure, rated link that can be opened to insert the slings and closed with a pin, allowing the load to travel smoothly through the connection and keeping the load path aligned. This preserves the sling’s strength and is field-adjustable.

Welding would expose the sling material to heat, often weakening it and making the joint permanent in a way that isn’t safe or easily inspected. Tying a knot in a sling—especially synthetic—drastically reduces its strength and can slip or fail under load. Tape offers no reliable, rated load path and would not keep the connection secure.

Remember to choose a shackle sized for the load, and keep the load aligned so it isn’t side-loaded on the shackle.