ISO 22915-24:2015

Overview - ISO 22915-24:2015 (Slewing variable-reach rough‑terrain trucks)

ISO 22915-24:2015 is part of the ISO 22915 series for verification of stability of industrial trucks. Used together with ISO 22915-1, this part specifies the static test procedures and acceptance criteria for slewing variable‑reach rough‑terrain trucks equipped with fork arms or load/non‑load carrying attachments. It excludes trucks fitted with personnel work platforms, tracks, or rail‑operation equipment.

Key goals:

• Verify resistance to overturning under controlled static conditions
• Account for practical dynamic influences (weight distribution, boom deflection, tyre/axle behaviour)
• Provide test prescriptions for trucks on wheels and on stabilizers

Key technical topics and requirements

• Tipping lines and reference planes: Defines tipping lines for trucks on wheels (non‑oscillating and oscillating axles) and for trucks on stabilizers/outriggers. Tests reference the longitudinal centre plane of chassis and upper structure.
• Tilt‑table test matrix (Tests T1–T5): Specifies positioning of truck relative to tilt axis for longitudinal, lateral and travel simulations. Tests include stacking/retrieving, travelling and boom/extension configurations in the least stable combinations.
• Test load and lift height: Tests require the load to be positioned at the least stable lift/reach combination. For travel simulations (T2/T4) fork face height is specified (e.g., 500 mm above ground in this standard).
• Lateral slope correction and chassis levelling: Trucks with chassis levelling may use maximum lateral slope correction up to 7 % for specified tests; other tests prohibit lateral slope correction.
• Oscillating vs non‑oscillating axle modes: Where applicable, tests are run in both axle modes and tipping lines are adjusted accordingly.
• Stabilizer tests and safety factor: For trucks on stabilizers, the measured actual capacity at the least stable boom configuration shall not exceed 80 % (safety coefficient 1.25) of the minimum load causing instability. Any additional capacity from stabilizers or levelling must be shown on the load chart.
• Marking and load charts: Annex provides example load charts and requires marking of additional capacities determined during stability tests.

Practical applications - who uses this standard

• Manufacturers and OEM design engineers validating stability of rough‑terrain variable‑reach trucks
• Test laboratories and conformity assessment bodies performing tilt‑table and stabilizer tests
• Fleet safety managers, procurement and compliance teams assessing machine suitability and load charts
• Regulators and standards committees referencing harmonized stability verification methods

Related standards

• ISO 22915‑1 - Industrial trucks - Verification of stability - General
• ISO 5053‑1 - Powered industrial trucks - Terminology and classification
• ISO 10896‑2 - Rough terrain trucks - Safety requirements - Slewing variable‑reach trucks

For safe application and certification, consult the full ISO 22915‑24:2015 document and associated parts for complete procedures, figures and normative tables.