Dynamic performance testing is the definitive evaluation used to verify that a full body fall arrest harness can safely arrest a free fall, absorb the resulting impact energy, and keep the wearer suspended without catastrophic failure. This technical article explains the purpose of fall arrest harness dynamic testing, the applicable standards such as EN 361, ANSI/ASSP Z359.11, GB 6095, and the ISO 10333 series, and the drop test methods and acceptance criteria applied by accredited third-party laboratories. Read on for a complete overview of test samples, procedures, instrumentation, and typical applications.
Technical Overview
A full body fall arrest harness is the central load-bearing component of a personal fall arrest system, designed to distribute arrest forces across the shoulders, chest, pelvis, and thighs during and after a fall. Unlike static strength testing, dynamic performance testing reproduces the real-world conditions of a fall event: high inertial loads applied in milliseconds, rapid loading of the attachment element, and simultaneous engagement of multiple webbing paths and hardware components.
The dynamic drop test is therefore the most severe and most representative assessment in the type-examination of a harness. It verifies that the harness retains the falling mass, that no load-bearing element ruptures or releases, and that the suspended body remains in a recoverable, head-up orientation. Accredited third-party laboratories perform these tests as part of product certification, regulatory compliance, and design verification.
- EN 361 – Full body harnesses (Europe, harmonized under the EU PPE Regulation 2016/425)
- ANSI/ASSP Z359.11 – Full body harness requirements (United States)
- CSA Z259.10 – Full body harnesses (Canada)
- GB 6095-2021 – Fall protection – Safety belts/harnesses (China)
- AS/NZS 1891.1 – Industrial fall-arrest systems and devices (Australia and New Zealand)
- ISO 10333 series – Personal fall-arrest systems (international reference framework)
Testing Samples
Full Body Harnesses
Test samples are new, unused production-representative harnesses covering all configurations offered by the manufacturer: dorsal-attachment-only models, multi-point models with sternal (front), shoulder, and hip attachment elements, and harnesses integrated with padding, adjustment hardware, and auxiliary components. Each attachment element intended for fall arrest is tested separately in the configuration designated by the marking.
Harness System Elements
Where the harness is supplied as part of an integrated system (for example, with a fixed lanyard and energy absorber), the dynamic test may be performed at system level to evaluate the combined performance, including arrest force behavior and total fall distance, in accordance with EN 355 and ISO 10333-2 for energy-absorbing components.
Test Dummies and Rigid Weights
EN 361 and GB 6095 testing employs an anthropomorphic rigid test dummy of 100 kg total mass, fitted with the harness adjusted to a snug fit per the manufacturer instructions. ANSI/ASSP Z359.11 testing uses a rigid steel weight of 128 kg (282 lb) shaped to engage the harness in a defined torso orientation. Instrumented dummies equipped with load cells and accelerometers may be used when arrest force data is required.
Sample Conditioning and Preparation
Prior to testing, samples are conditioned to standard laboratory atmosphere (typically 23 ± 5 °C with controlled humidity) unless a specific environmental preconditioning regime is required. Each sample is visually inspected, dimensionally verified, and donned on the dummy by qualified personnel to eliminate fit-related variability. Multiple harness samples are provided so that every attachment point can be subjected to its own drop test.
Testing Items
The dynamic test program for fall arrest harnesses typically covers the following evaluation items:
- Dynamic strength of each fall-arrest attachment element (dorsal, sternal, shoulder pair, hip pair)
- Retention of the test dummy or weight after arrest, with no ejection from the harness
- Post-drop suspended orientation angle of the dummy relative to vertical
- Integrity of webbing, stitching patterns, and keeper loops after impact
- Deformation, distortion, or locking failure of buckles, D-rings, and adjustment hardware
- Supporting static strength verification, typically up to 15 kN (EN 361) or 22.2 kN / 5,000 lbf (ANSI/ASSP Z359.11)
- Measured arrest force and fall distance in system-level tests with energy absorbers
Testing Methods
Dynamic testing is performed on a purpose-built drop tower consisting of a rigid overhead anchor structure, an instrumented release mechanism, a calibrated load measurement chain, and high-speed video capture for post-test failure analysis. The harness is donned on the dummy or weight, connected to the anchor through the specified connection element, raised to the required height, and released into free fall.
EN 361 Dynamic Performance Procedure
The 100 kg dummy, wearing the harness, is connected by the attachment element under test and released to achieve a 4 m free fall. After arrest, the dummy must be retained, and when the suspended dummy stabilizes and is raised, its longitudinal axis must remain within 50 degrees of vertical. The test is repeated for each designated fall-arrest attachment element, and the harness is subsequently examined for any rupture, torn stitching, or hardware failure that would compromise further use.
ANSI/ASSP Z359.11 Procedure
The harness is fitted to the 128 kg (282 lb) rigid weight and dropped through a 1.83 m (6 ft) free fall onto each attachment D-ring configuration. The harness must arrest and support the weight without release, and load-bearing elements must remain functional. Static proof testing to 22.2 kN (5,000 lbf) is performed as a complementary requirement.
GB 6095-2021 Procedure
The Chinese national method deploys a 100 kg test dummy released with fall factor 2 loading at the marked fall-arrest attachment points. The harness must arrest the fall, retain the dummy, and hold the suspended dummy within the orientation limits specified in the standard, with no failure of any load-bearing component.
Acceptance Criteria
- The falling mass is fully arrested and retained by the harness
- No load-bearing webbing, stitching, or hardware ruptures or disengages
- The attachment element does not deform to the point of release or malfunction
- The suspended dummy orientation remains within the angle limit defined by the applicable standard
- No criterion indicates a risk of the wearer slipping out of the harness during or after arrest
Test reports issued by accredited third-party laboratories document the drop parameters, instrumentation data, photographic and video evidence, observations of damage, and a clear pass/fail determination against each clause of the referenced standard.
Applications
Dynamic performance test reports and certificates of conformity are used across the full life cycle of fall protection equipment:
- CE type examination and category III certification under the EU PPE Regulation 2016/425, based on EN 361
- Compliance demonstration for the North American market under ANSI/ASSP Z359 and CSA Z259 frameworks
- Conformity assessment for the Chinese market under GB 6095-2021 and associated safety marking schemes
- Research and development validation of new webbing materials, stitch patterns, and hardware designs
- Production batch surveillance and periodic factory audits by certification bodies
- Procurement verification by employers, contractors, and safety managers selecting fall arrest equipment
- Incident and failure investigations following workplace fall events
End-use sectors that depend on certified harnesses include construction and scaffolding, wind energy and power transmission, telecommunications towers, oil and gas, shipbuilding, window cleaning and facade maintenance, confined space entry, and technical rescue teams.
FAQ
What is the purpose of the dynamic test for a fall arrest harness?
The dynamic test simulates a worst-case free fall to confirm that the harness can absorb the impact energy, retain the wearer, and hold the body in a survivable suspended orientation without any load-bearing element failing.
What test mass and drop height are used?
EN 361 and GB 6095 use a 100 kg test dummy, with EN 361 specifying a 4 m free fall and GB 6095 applying fall factor 2 loading. ANSI/ASSP Z359.11 uses a 128 kg (282 lb) rigid weight dropped through a 1.83 m (6 ft) free fall.
How does dynamic testing differ from static testing?
Static testing applies a slowly increasing force (for example, 15 kN or 5,000 lbf) to measure ultimate strength, while dynamic testing applies a sudden impact load that reproduces real fall dynamics, including inertia, shock loading, and body movement effects.
Can a harness be reused after it has been dynamically tested or has arrested a fall?
No. Test samples are destroyed by the drop test and are never returned to service. Similarly, any harness that has arrested a fall or been subjected to shock loading must be removed from service and destroyed, even if no damage is visible.
Do harnesses in service need to be periodically retested?
Dynamic testing is a type-examination activity performed on new samples, not on field equipment. In-service harnesses are instead managed through a documented regime of pre-use checks by the user and detailed periodic inspections by a competent person, with retirement based on inspection findings, service life limits, and manufacturer instructions.
Which standard should a manufacturer test against?
The target market determines the applicable standard: EN 361 for Europe, ANSI/ASSP Z359.11 (and CSA Z259.10 for Canada) for North America, and GB 6095-2021 for China. Accredited third-party laboratories can guide manufacturers in building a multi-standard test program for global market access.