Overview
ISO 22915-14:2010 - Industrial trucks - Verification of stability - Part 14: Rough-terrain variable-reach trucks - defines tests and verification procedures to assess the static and dynamic stability of rough-terrain variable-reach trucks equipped with fork arms or other load-carrying/non-load-carrying attachments. It excludes trucks designed for freight containers, lifting people or suspended loads. This part is one of the ISO 22915 series that replaced ISO 8379:1998 and is intended for manufacturers, test laboratories and safety assessors.
Key topics and technical requirements
- Scope and applicability: Applies specifically to rough-terrain variable-reach trucks; refers to general requirements in ISO 22915-1 for terms and overall test conditions.
- Tilt-table testing: Stability is verified using a tilt table. Truck positioning on the tilt table is defined relative to load and steer axle locations and specific turning/steering configurations.
- Five test types (Tests 1–5): Covers longitudinal and lateral stability, travel and stacking/retrieving modes, and specific tests for boom extension/angle (max/min extension at maximum boom angle).
- Test loads and lift/reach positions: Tests 1 and 3 use the least stable lift/reach combination with forks parallel to the tilt table; test load centre-of-gravity positioning follows ISO 22915-1.
- Lift heights for travel simulation: For travel-related tests, fork upper face height at the fork heel is specified as 300 mm for trucks ≤ 10 t rated capacity and 500 mm for trucks > 10 t.
- Stabilizers and axle locking: Where operator-selectable stabilizers or manual axle locking are fitted, tests must be run with these devices both engaged and disengaged. Lateral slope correction (levelling) up to 7% (≈4°) may be applied for specified tests.
- Marking and load charts: Any additional capacity determined when stabilizers/chassis levelling are used must be indicated on the truck’s load chart (see informative Annex A).
Practical applications and users
- Who uses it:
- Manufacturers for design validation and type testing of rough-terrain variable-reach trucks.
- Independent test labs and certification bodies for conformity assessment and safety certification.
- Fleet operators, safety engineers, and procurement teams for evaluating vehicle capabilities and safe operating envelopes.
- Training and maintenance teams to understand limitations related to stabilizers, boom extension and travel conditions.
- Typical uses:
- Verifying stability performance before market release.
- Producing compliant load charts and capacity markings.
- Defining safe operating procedures and limits for field use on uneven/rough terrain.
Related standards
- ISO 22915-1 (General - verification of stability) and other parts of the ISO 22915 series addressing different truck types and special stability tests. Keywords: ISO 22915-14, rough-terrain variable-reach trucks, stability verification, tilt table tests, load chart, stabilizers, axle locking.