As the name suggests, restraints prevent the eventuality of a worker failing from height. A restraint system is usually a simple system involving a lanyard of a specific length fixed to a specific point. The lanyard is measured to be a shorter length than the distance of a fall that could potentially be dangerous.

The system incorporates a knurled threaded sleeve, which is secured into the structure with a two-part resin system. Once cured an eyebolt is screwed into the insert to the required torque setting. The anchor is then tested by applying pressure away from the structure, in the opposite direction to which it was inserted. Restraint eyebolts can also be installed in structural steel.

BS 8437:2005 Code of practice for selection, use and maintenance of personal fall protection systems and equipment for use in the workplace, states that the anchorage should be able to withstand twice the mass it is ever likely to be subjected to. Once installed the anchor will have a calibrated test rig set up on it and the anchor will be tested to the required force.

Once the rigorous testing and inspection stage is complete, certification will be issued for the use of the eyebolts.
The eyebolts are also subjected to a visual inspection by the user every time they are used and are re-tested annually.