ISO 10896-4:2015

Overview

ISO 10896-4:2015 - Rough-terrain trucks - Safety requirements and verification - Part 4: Additional requirements for variable-reach trucks handling freely suspended loads - specifies additional safety requirements and verification methods for variable-reach rough-terrain trucks (telehandlers) fitted with lifting attachments that handle loads that can swing freely. It applies to trucks covered by ISO 10896‑1 and ISO 10896‑2 and addresses significant hazards when machines are used as intended. The standard also lists clear exclusions (e.g., loads or lifting means that prevent swinging, personnel-lifting attachments, certain lifting accessories and freight-container handlers) and is not retroactive to trucks manufactured before its publication.

Key technical topics and requirements

• Scope & exclusions: Covers variable-reach trucks handling freely suspended loads; excludes designs preventing load swing, attachments for personnel, some accessories and container handlers.
• Mounting and fixing: Lifting attachments must prevent unintentional detachment, minimise risks to slingers/riggers and bystanders, and avoid snagging or interference with truck functions.
• Design and strength:
  • Lifting attachment structural strength: verified by calculation and/or test to withstand 2.5 × rated capacity without permanent deformation or release.
  • Load-handling devices (hooks, grabs, magnets) must at least match the attachment’s rated capacity.
• Wire rope and hoist requirements:
  • Hooks must be sized for rope and hoist capacity; wire rope must remain taut on the drum when the boom is lowered.
  • Means to prevent rope jumping off sheaves and a hoist limiter to prevent hook impact with structure.
  • Wire ropes: factor K ≥ 3.55 (relating minimum breaking strength to the rated capacity and accessory deadweight). Working coefficient for rope terminations ≥ 5.
• Stability & load charts:
  • Load charts for suspended-load attachments required; stability verification references ISO 22915 series.
  • Hoist stop: a sudden stop during maximum lowering must not cause truck tip-over - verified by dynamic testing.
  • Pick-and-carry (tyres): stability assessed on a lateral slope of 8.75% (≈5°) with specified load offsets; rated capacity must not exceed 66.6% of the tipping load (allows walking speed ~3.2 km/h).
• Verification: Static, dynamic structural and longitudinal stability tests and information-for-use requirements are specified.

Practical applications and users

This standard is essential for:

• Machine manufacturers designing and certifying variable-reach rough-terrain trucks and lifting attachments (telehandlers, jibs, hoists).
• Safety engineers, test laboratories and conformity assessors performing strength and stability verification.
• Regulators, fleet managers and maintenance providers establishing safe operating limits, operator instructions and inspection criteria. Use cases include design approval, factory testing, in-service inspection protocols, and documentation of safe working limits for suspended-load operations.

Related standards (for reference)

• ISO 10896-1, ISO 10896-2 (other RTT safety parts)
• ISO 12100 (machine safety - risk assessment)
• ISO 22915 series (stability verification)
• ISO 21898 (flexible intermediate bulk containers)
• ISO 11525-4 (user requirements for freely suspended loads)

Keywords: ISO 10896-4:2015, rough-terrain trucks, variable-reach trucks, telehandler safety, freely suspended loads, lifting attachment, hoist, wire rope, stability tests, load chart, pick-and-carry.