ISO 11525-4:2016

Overview

ISO 11525-4:2016 - "Rough-terrain trucks - User requirements - Part 4: Additional requirements for variable-reach trucks handling freely suspended loads" provides specific user-focused safety, training, inspection and operational requirements for slewing and non‑slewing variable‑reach rough‑terrain trucks when they handle freely suspended loads. Used alongside ISO 11525‑1 or ISO 11525‑2, this part takes precedence where its provisions differ. It aims to prevent personal injury and property damage and to establish clear criteria for operation, maintenance and training. Note: ISO 11525‑4:2016 is not applicable to flexible intermediate bulk containers (see ISO 21898).

Key topics and technical requirements

• Scope & precedence: Supplements ISO 11525‑1/‑2; where conflicts exist, Part 4 prevails for freely suspended loads.
• Operator documentation: Operators must have access to the manufacturer’s operator’s manual and safety bulletins.
• Training & qualifications:
  • Mandatory additional training on handling freely suspended loads (stability effects, tethering, boom positioning, signalling and rigging).
  • Practical testing on pick‑up and placement; retraining and record keeping required.
• Pre‑lift checks:
  • Verify total load weight including rigging and load centre.
  • Confirm ground/surface capacity and frame levelling per manufacturer limits.
  • Use approved lifting points and do not suspend loads from forks unless manufacturer‑approved.
• Operational controls:
  • Use tether/tag lines and trained personnel when travelling with suspended loads.
  • Employ a qualified signal person if visibility is obstructed; follow ISO 16715 hand‑signal guidance.
  • Keep loads low, vertical lifts only, avoid dragging or horizontal pulling.
  • Never lift personnel on suspended loads; observe wind and fall‑zone restrictions.
• Attachments & equipment:
  • Ensure attachments are secured and locking devices engaged.
  • Reset rotating fork carriages to neutral before lifting; verify attachment stability under load and vibration.

Practical applications

ISO 11525‑4:2016 is used to manage risks whenever variable‑reach rough‑terrain trucks handle suspended loads. Typical use cases include:

• construction sites, civil engineering and infrastructure
• mining and quarry operations
• oil & gas and utilities maintenance
• heavy equipment yards, ports and logistics hubs It provides actionable guidance for safe lift planning, operator competency, site controls and maintenance practices.

Who should use this standard

• Truck operators and trainers
• Fleet managers and safety officers
• Equipment manufacturers and dealers
• Site supervisors, riggers/slingers and occupational safety regulators

Related standards

• ISO 11525‑1:2012 - Rough‑terrain trucks - General user requirements
• ISO 11525‑2:2015 - Slewing variable‑reach trucks
• ISO 10896‑4 - Safety requirements for variable‑reach trucks handling suspended loads
• ISO 16715 - Cranes - Hand signals used with cranes
• ISO 21898 - Flexible intermediate bulk containers (not applicable for Part 4)

Keywords: ISO 11525‑4:2016, rough‑terrain trucks, variable‑reach trucks, freely suspended loads, operator training, tether tag lines, fall zone, attachments, safety requirements.