Millbrook Harness drop testing

11 September, 2010

Millbrook testing centre is one of Europe's leading locations for the development and demonstration of every type of land vehicle, from motorcycles and passenger cars to heavy commercial, military and off-road vehicles.

The facilities they provide were ideal for the comparative drop testing required to demonstrate that the ZT Harness exceeded safety performance measures of existing harnesses. For traditional groin strap type harnesses, beyond some very basic tolerance stats measuring forces on the body, there was nothing to indicate that these harnesses would not cause considerable damage to the body in the event of a fall. Using crash test dummies that could measure the forces applied to specific parts of the body, identical drop tests were carried out to compare the ability of the ZT Harness against a traditional harness and how they protect the body in the event of a fall.

High speed cameras and sophisticated measuring equipment revealed startling difference is in the shock and arrest forces applied. The overall arrest force applied to the body was reduced by 40% using the ZT Harness, to be noted with this is that with the ZT Harness the forces are also distributed more evenly on the body as compared to the traditional harness, where almost all of the arrest force is applied through the groin straps to the groin - with the 100kg dummy and a 4 metre drop this was in the order of 1.1 tonne.

The crash test dummies at Millbrook are equipped with sensors to measure whip lash forces in the neck, the tolerance metric for car drivers - beyond which point permanent damage is caused - is 37N, the ZT Harness out performed the traditional harness in the order of 400% with a very safe 18N against the groin type harnesses critical 81N.

This test day proved unequivocally that the ZT Harness set new standards in fall safety, with its considerable reduction in the damaging forces applied to the body in the event of a fall.

The Evolution of the Fall Safety Harness

25 June, 2010

Vertikal Days at Haydock Park, saw the official launch of the new ZT safety harness. The ZT harness is marketed as a fall arrest and fall restraint harness, and employs a unique design that eliminates the use of groin straps and importantly the damage they cause.

The fall arrest harness was met with a great deal of interest as users of existing fall harnesses saw the excellent benefits that this new type of harness would bring. Taking away the use of groin straps would make the harness more comfortable to wear in every day use, and as the harness is already 'built into' a durable pair of work wear trousers it can be worn effortlessly throughout a working day.

As well as being more comfortable to wear for workers at height, if the user were to experience a fall, the harness reduces the fall arrest forces by up to 40%, and once the user comes to a resting position they are held in a 'close to' horizontal seating position. Once in this position there is no restriction to major arteries and to blood flow, thereby reducing the risk of suspension trauma and the critical consequences.