What is the working load limit (WLL) of a tiedown?

Working Load Limit (WLL) is the maximum load a tiedown is designed to handle during normal use. It is typically one-third of the tiedown's breaking strength, providing a safety margin for shock loads, wear, and degradation. Federal regulations require the aggregate WLL of all tiedowns on a piece of cargo to equal at least half of the cargo's weight, plus enough WLL to handle dynamic forces during driving. Tiedowns must be marked with their WLL by the manufacturer. Using tiedowns beyond their WLL risks failure under braking, sudden maneuvers, or rough roads. Common WLL values: 1/4-inch chain Grade 70 has about 3,150 pounds WLL; 2-inch wide ratchet strap has about 3,333 pounds WLL, though these vary by manufacturer. Always read the tag.