What does aggregate working load limit mean?
Working load limits determine how much weight or force tiedowns and other securing devices can secure without breaking. The aggregate working load limit is the sum of the working load limits for each device you use to secure your load. To meet safety requirements, the aggregate working load limit of the devices you use must be at least 50% of the total weight of all the pieces of cargo you are hauling.
You can figure out the aggregate working load limit of your securing devices by adding together:
- 50% of the working load limit of each tiedown that is attached to an anchor point on your vehicle, and
- 50% of the working load limit of each tiedown that is attached to your vehicle and goes over, around or through your cargo.
The sum equals your aggregate working load limit. It’s important to properly figure your aggregate working load limit and use the necessary amount of tiedowns for every load you haul. If you don’t, you risk being cited by the DOT or losing your cargo on the road, which could lead to serious injury to you or to another motorist.