In the last blog post we discussed the mathematics of how the Working Load Limits (WLL) is such a small percentage of the actual strength of the components, now let’s discuss the rationale of making it so small.
Simply put: Safety
The device must not fail. Life, limb and property depend upon proper operation.
When a device is tested close to a maximum it breaks down. Redline your engine enough and you’ll need a new one shortly. If a restraint device has any components with a tensile or WLL at or just under the advertised product’s WLL, your employees will be testing the device at its max unknowingly.
Things fail at Max
WLL recommendations for cargo restraint devices must always err on the side of caution. Devices rating the WLL at or above any components tensile strength must be thoroughly examined.