Overview
EN ISO 13355:2016 (ISO 13355:2016) - published by CEN/ISO - specifies a standardized method for performing a vertical random vibration test on complete, filled transport packages and unit loads. The standard defines how to reproduce vertical vibration hazards using random excitation, and provides assessment methods to evaluate package strength and the protection offered to contents. Tests can be run as standalone vertical-vibration checks or as part of a multi-test sequence simulating a distribution system.
Key topics and technical requirements
- Test scope: Complete, filled transport packages and unit loads (referred to as the test specimen).
- Vibration method: Vertical random excitation (random vibration theory per IEC 60068-2-64).
- Frequency range: Nominally 2 Hz to 200 Hz with at least 1 Hz resolution (low-end adaptable by agreement).
- Apparatus: Stiff vibration table (lower resonant frequency above the test frequency) of suitable size, power and displacement.
- Measurement & control:
- Accelerometers, signal conditioning and data system capable of generating required power spectral density (PSD).
- Analysis with at least 120 statistical degrees of freedom; data/control response accurate to ±5% across test band.
- Test procedure highlights:
- Condition specimens per ISO 2233 and mount per ISO 4180 guidance.
- Centre of gravity near table centre; horizontal acceleration components limited to ≤20% of vertical.
- Start at –6 dB below test level to equalize PSD, then ramp to full level for the specified duration.
- Tolerances: RMS acceleration ±15%; PSD deviation ±3 dB across the frequency range.
- Documentation: Test report must reference ISO 13355 and record test conditions, dates, specimen IDs and responsible personnel.
- Annexes: Annex A (normative) provides a generic transportation PSD; Annex B (informative) gives PSDs derived from recorded data.
Practical applications and users
- Who uses it: Packaging engineers, test laboratories, manufacturers, logistics and freight companies, quality assurance teams, and standards bodies.
- Why use it:
- Validate package design against real-world vertical vibration hazards.
- Compare packaging materials and cushioning strategies.
- Support compliance testing, supplier acceptance, and failure analysis.
- Integrate into a full distribution test programme to simulate transport damage mechanisms.
Related standards
- ISO 2233 - Conditioning for testing
- ISO 2234 - Stacking tests (static load)
- ISO 4180 - Mounting requirements for package vibration tests
- IEC 60068-2-64 - Random vibration theory and methods
- ISO 2206 - Identification of package parts during testing
Keywords: EN ISO 13355:2016, ISO 13355, vertical random vibration test, packaging, unit loads, transport packages, power spectral density, vibration testing.