Witness testing is the independent check that a lift’s safety tests were actually done, done properly, and passed. When a contractor commissions a new or modernised lift, or carries out the periodic tests a maintenance agreement or a regulator requires, we stand in the machine room and on the car top while the tests are run — safety gear, overspeed governor, buffers, brakes, unintended-movement protection, emergency communication and fire service — and we sign off only what we saw. Owners, builders, superintendents and certifiers engage us across Australia and New Zealand.
Recent witness testing includes commissioning of modernised lifts at Rivage Royale on the Gold Coast and periodic tests witnessed for hotel and strata clients in Brisbane and Sydney.
When a lift company installs or maintains a vertical transportation system, they are required to perform safety tests by law. Safety tests are required as part of the process of commissioning a new system, or as part of a periodic maintenance and inspection routine for existing systems.
Vertical transportation systems are complex mechanical systems that involve several moving parts and potentially hazardous elements, such as high-voltage electrical components and heavy weights. As such, it is crucial to ensure that the equipment is tested properly ensuring the safety of anybody using the equipment and protecting the interests of the building owner.
Our team of industry-trained professionals will witness tests with lift contractors to ensure that the system is safe, complies with the relevant states’ statutory legislation and regulations, operates at optimal levels, and meets the performance requirements outlined in the design specifications.
During a witness test, TLC observes the contractor performing various tests on the vertical transportation system including load testing, safety gear testing, door safety testing, functionality testing, and emergency testing, among others.
Overall, the purpose of a witness test is to provide an independent assessment of the vertical transportation system, ensuring the equipment meets all necessary safety and performance requirements, performs to its optimum levels, and satisfies all of the criteria specified within the design scope.
Upon completion of our witness test, TLC will provide a report detailing the specific tests performed, the results of the tests, and any recommendations or observations made. Any issues observed during the test will be documented and recommendations provided. From time-to-time vertical transportation systems fail certain tests for many reasons. If required TLC will recommend that additional testing or maintenance is performed to ensure the continued safe operation of the vertical transportation system.
What witness testing is
Witness testing is attending the tests on a lift or escalator and verifying, on behalf of the owner, that what was specified is what has actually been installed and demonstrated. It is not a repeat of the contractor's own testing. It is an independent record that the tests took place, that they were carried out correctly, and that the equipment performed as it was required to.
The value is in the timing. Handover is the last point at which a shortfall can be corrected as part of the contract rather than argued about afterwards, and it is the point at which the commercial pressure to sign off is highest.
What gets witnessed
Statutory and safety testing, including the safety gear, overspeed governor, buffers and brake.
Emergency and rescue operation, including the emergency communication and any battery-backed lowering or evacuation function.
Fire service and emergency control functions where they are provided.
Door operation and protection, including reopening devices and closing forces.
Performance against the specification: speed, levelling accuracy, door times, ride quality and noise.
Control system behaviour, including group operation, and any special modes the building requires.
Completeness of the handover package: documentation, diagnostic access, spares and warranty terms.
What we commonly find
Rarely anything dramatic. What comes up repeatedly is levelling outside tolerance, door timing set for the convenience of commissioning rather than for the building's traffic, emergency communication that has not been connected to a monitored service, ride quality that is acceptable but well short of what was specified, and handover documentation that is incomplete in exactly the areas that matter later - the parameters, the passwords and the diagnostic access.
None of those items would stop a lift working. All of them are much harder to obtain once the contractor has been paid and demobilised.
Why an owner should not witness their own testing
Attending is not the same as verifying. Knowing which tests should be performed for the equipment in question, in what order, under what load, and what an acceptable result looks like, is a technical exercise. An owner's representative present in good faith and told that everything has passed has no independent basis to say otherwise, and their signature is then used as evidence that it did.
What you receive
A written report listing the tests witnessed, the results, anything not demonstrated and why, and a defects list where one is warranted, with each item tied back to the specification or the standard it fails. Where the installation is acceptable we say so plainly. Where it is not, you have a document that can be acted on before final payment.
When witness testing is needed
New installations, before practical completion and handover, when the commissioning tests are run.
Modernisations and major changes, such as a new controller, machine, safety gear, overspeed governor or door equipment. AS 1735.1.2 (Annex C) treats an important modification as a point at which examinations and tests are repeated.
After an accident or a significant repair, before the lift is returned to service.
Periodic safety tests that a maintenance agreement or the building's own risk management requires.
At the end of a defects liability period, to confirm defects have been closed out before the retention is released.
Lifts and escalators are registrable plant under the WHS Regulations, and the owner carries duties for their safe operation. An independent record that the tests were done, and done properly, protects the owner if that is ever questioned.
Lift tests we witness
Braking system - the machine brake stopping and holding the car under the specified test load.
Safety gear and overspeed governor - the governor tripping at the right speed and the safety gear stopping and holding the car.
Ascending car overspeed and unintended car movement protection - on lifts where these are required.
Buffers and final limit switches.
Traction - the ropes or belts holding the car without slipping under load.
Door locks, door force and reopening devices.
Levelling and stopping accuracy, including under load.
Overload and load weighing.
Emergency alarm and two-way communication, connected through to a monitored service.
Emergency lighting, battery rescue and evacuation functions where fitted.
Fire service recall and firefighter control, tested with the fire system where the lift has these functions.
Escalator and moving walk tests we witness
Brake stopping distances, unloaded and under the brake test load (AS 1735.5.1, clause 5.4.2.1.3).
Handrail speed against step speed, and handrail entry guards.
Step, pallet and skirt clearances, comb plates and the devices that stop the unit if they are obstructed.
Emergency stop switches, missing step detection, non-reversal protection and the safety circuit.
Auxiliary brake where one is fitted.
The standards we test against
AS 1735.1.2:2021 (EN 81-20) for new passenger and goods passenger lifts. Clause 6.3 sets out the examinations and tests before putting into service.
AS 1735.1.3:2021 (EN 81-50) for the design and testing of lift components.
AS 1735.20:2020 (EN 81-21) for new lifts installed in existing buildings.
AS 1735.10 for periodic testing of older lifts designed to AS 1735.2 and AS 1735.3.
AS 1735.5.1:2019 (EN 115-1) for escalators and moving walks.
Then the contract specification and the manufacturer's own test procedures, which often require more than the standard does.
How a witness test runs
Before the day we review the specification, the contractor's test procedures and the design registration, and confirm that test weights, instruments and the fire services contractor will be on site.
On the day the contractor runs each test while we observe and record the method, the readings and the result. We do not operate the equipment ourselves.
After the visit you receive a written report: what was tested, what passed, what was not demonstrated, and a defects list tied to the specification or clause each item fails.
Witness testing questions
How long does witness testing take?
For a new or modernised lift, allow most of a day per lift, depending on how ready the installation is and how many functions need to be demonstrated. Periodic tests on an existing lift are usually shorter. Escalators take a similar time to a lift. We confirm the programme with the contractor before the visit so nobody is waiting on site.
Who supplies the test weights and equipment?
The lift contractor. Load tests need certified test weights on site, along with the instruments needed to measure speeds, stopping distances and door forces. Confirming this before the day is part of our pre-test review, because a missing test weight is the most common reason a test day is lost.
What happens if a lift fails a test?
It is recorded, the contractor rectifies it, and the test is repeated. A failed test before handover is the system working as intended: it is found while the contractor is still on the job and still owed money. We can attend the retest, or review the contractor's retest records if the item is minor.
Do periodic tests on existing lifts need to be witnessed?
They do not have to be, but they are often the tests owners know least about. A maintenance agreement usually says which tests the contractor will perform and how often. Witnessing them is the only way an owner can know they were done, and done properly, rather than taking a line on an invoice at face value.
Is witness testing the same as a lift audit?
No. An audit looks at the condition of the equipment and the quality of the maintenance over time. Witness testing verifies specific safety and performance tests on the day they are performed. They complement each other, and on a modernisation or new installation we often do both.
Do you witness testing in Sydney, Melbourne and other cities?
Yes. We have consultants on the Gold Coast, in Sydney, Melbourne, Canberra, Perth and Auckland, and we travel for projects elsewhere in Australia, New Zealand and the Pacific.
What does witness testing cost?
It is quoted per visit, based on the number of lifts or escalators, the type of testing and the location. Tell us what is being tested and when, and we will give you a fixed fee.