Everyday in Australia, thousands of vehicles and trucks fail roadworthy checks due to faded, frayed or damaged seat belt webbing.
For many workshops and fleet operators, sourcing and replacing seat belts quickly that comply with Australian Design Rules can be difficult.
If the vehicle or truck is under 10 years of age a genuine replacement part can easily cost in excess of $850.00.
If older than 10 years a replacement belt can be difficult if not impossible to find.
This is where Restraint Technology can assist. Through its experience in manufacturing seat belts, Restraint Technology has the knowledge to safely and economically replace seat belt webbing of any vehicle new and or old.
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Seat belt webbing plays a critical role in occupant safety. The risk of using a worn seat belt is generally underestimated.
It’s not just about keeping someone restrained — it’s about managing the enormous energy and loads experienced in an accident.
In a collision, compromised webbing can snap or tear, failing to restrain the occupant as intended. Even if it doesn’t break, it may stretch excessively, significantly reducing its ability to absorb crash forces.
This not only increases the risk of injury but can also allow the occupant’s body to move forward with dangerous momentum — a leading cause of head, chest, and abdominal trauma.
Damaged webbing can also impair the performance of the seat belt mechanism.
It may fail to retract smoothly or lock effectively when needed, especially during sudden stops or impacts.
In severe cases, failure to restrain properly can result in partial or complete ejection from the vehicle; dramatically increasing the likelihood of fatal injury.
From a compliance standpoint, seat belts with worn webbing will almost always fail a roadworthy or safety inspection, putting registration or vehicle delivery timelines at risk — something no workshop or fleet operator wants.
Additionally, UV faded fibres can reduce webbing strength by 60 per cent and, in a collision, can mean the difference between life and death.
Seat belt performance and certification requirements
The seat belt is designed and manufactured to absorb enormous forces without excessive stretching, tearing, or detaching from anchorage points.
And be durable enough to repeatedly operate for years without failure. The Australian Design Rule (ADR) 4/06 Seat Belts, requires the seat belt to pass the following tests.
Each seat belt must be extracted and rewound through 50,000 cycles without failure.
ADR 4/06, also states the seat belt and its components must withstand a static (gradual and consistent) force of up to 14.7kN (1,470 kg-force) without failure.
Seat belts must also sustain the forces generated from a frontal impact.
This is called dynamic testing and the ADR standard requires a seat belt to be sled tested at 48km/h.
In this situation the forces are larger and more violent as the testing has to reflect the actual forces experienced in a crash.
As an example, a 75kg adult can experience forces equivalent to 20–30 times their body weight — equal to 2.5 tonnes of force.
Providing solutions
Providing the original hardware performs appropriately Restraint Technology replaces old, damaged webbing with brand-new, ADR-compliant webbing, restoring the seat belt to a roadworthy condition — at a fraction of the cost of a genuine replacement belt.
Restraint Technology’ process includes:
- The worn seat belt is removed from the vehicle and either brought or mailed in.
- Photograph the original seat belt.
- Inspect every component for fatigue, corrosion, damage and suitability for reuse.
- Check the locking function of the retractor both X and Y angles as well as webbing sensitivity.
- New ADR-compliant webbing is then threaded and sewn onto the retractor; Restraint Technology’s industrial sewing machine ensures the appropriate thread type, sew patten and stitch number to achieve the tensile strength required.
- Check against the original photograph, sign off and return it ready to refit — usually within 24 hours.
Restraint Technology provides a fast, compliant, and affordable seat belt webbing replacement service — trusted by hundreds of workshops and fleet operators across Australia.
If you need a seat belt rewebbed or simply have a seat belt question please contact:
Address: Unit 14, 52/50 Malvern St, Bayswater VIC 3153. Phone: (03) 9729 1988