ISO 22915-8:2018

Overview

ISO 22915-8:2018 - part of the ISO 22915 series - defines an additional stability test for industrial trucks operating in the special condition of stacking with the mast tilted forward and the load elevated. The standard applies to wheeled, self‑propelled or pedestrian‑propelled industrial trucks (excluding rail-mounted) with tiltable masts and specifies how to verify stability under this specific, high-risk operating condition.

Key topics and requirements

• Scope: Applies to counterbalanced trucks, reach/retractable-mast and straddle trucks, pallet stackers, bidirectional/multidirectional trucks, rough‑terrain trucks, and counterbalanced trucks with articulated steering - all with tiltable masts (see ISO 22915‑2, ‑3, ‑4, ‑7, ‑13, ‑15).
• Test condition: The test is performed with the mast and forks fully elevated and fully tilted forward (special operating condition).
• Positioning: Truck position on the tilt table is defined by the corresponding “test 1” procedure in the applicable part of ISO 22915 (e.g., ISO 22915‑2 for counterbalanced trucks).
• Verification method: Stability is verified in accordance with the referenced test procedures for the truck type (ISO 22915‑2, ‑3, ‑4, or ‑7 as applicable).
• Marking: The determined capacity under this special operating condition and the mast forward‑tilt angle must be indicated on an information plate visible to the operator, in line with ISO 3691‑1.
• Normative references: Includes ISO 22915‑1 (general), ISO 5053‑1 (terminology/classification), ISO 3691‑1 (safety requirements), and the relevant ISO 22915 parts for specific truck types.

Applications and users

ISO 22915-8:2018 is practical for:

• Manufacturers and OEMs - to validate design, stability limits and operator information for trucks with tiltable masts.
• Test laboratories and certification bodies - to perform standardized stability verification and support type approvals or conformity assessment.
• Fleet managers and safety engineers - to assess operating limits, safe stacking practices, and to ensure correct capacity labeling.
• Regulators and procurement specialists - to reference objective test criteria when specifying safety requirements or purchasing industrial trucks.

Using ISO 22915‑8 supports safer stacking operations by addressing a critical instability scenario (mast tilted forward with elevated load), helping reduce tip-over risks and ensuring consistent, documented verification across markets.

Related standards

• ISO 22915‑1 - Verification of stability - General
• ISO 22915‑2, ‑3, ‑4, ‑7, ‑13, ‑15 - Stability tests for specific truck types
• ISO 3691‑1 - Industrial trucks - Safety requirements and verification
• ISO 5053‑1 - Terminology and classification (types of industrial trucks)

Keywords: ISO 22915-8:2018, industrial trucks, verification of stability, mast tilted forward, stacking with load elevated, tiltable masts, stability test, ISO 22915 series.