ISO 7296-3:2006

Overview

ISO 7296-3:2006 - Cranes: Graphical symbols - Part 3: Tower cranes defines a standardized set of graphical symbols for tower-crane operator controls and displays (as defined by ISO 4306-3). The standard ensures consistent visual language on control panels, HMIs and documentation by listing symbols (many with ISO/IEC registration numbers) and providing examples of symbol combinations in Annex A.

Key topics and requirements

• Scope: Symbols are for operator controls and other displays specific to tower cranes (per ISO 4306-3).
• Symbol catalogue: Includes widely used pictograms covering:
  • power on/off, horn, warning and danger indicators
  • environmental and comfort icons (ventilation, heating, cooling, lighting)
  • wind speed and wind direction
  • hoist and hook functions (lift/lower, rope winch, rope reeving single/two/four falls)
  • slewing (clockwise/anticlockwise, weathervaning), trolley travel, luffing (in/out)
  • telescopic boom extend/retract, clamshell bucket open/close
  • rail-mounted base, rail clamp engaged/disengaged, assembly/erecting types
  • brakes (on/off, wear), lubrication, speed modes (normal/fast/very fast)
  • limit/overtravel and limit override indicators, plus many crane-specific limit devices (detailed examples in Annex A)
• Annex A (informative): Shows examples of combined symbols (e.g., limit devices, turning-moment or load-limiting device indications).
• Normative references: Relies on ISO 4306-3 (tower-crane vocabulary) and references symbol registries such as ISO 7000 and IEC 60417.

Applications

• Control-panel and HMI design: Use the standardized symbols to ensure clear, internationally understood controls on operator consoles and touch displays.
• Technical documentation and manuals: Illustrate operating procedures and warnings consistently across languages.
• Safety signage and labeling: Improve operator awareness and reduce misinterpretation of controls in field and maintenance contexts.
• Training and competency programs: Create standardized training materials and simulation interfaces.
• Manufacturing and compliance: Help manufacturers and OEMs align crane controls with international best practice for interoperability and regulatory review.

Who uses this standard

• Tower crane manufacturers and OEM control suppliers
• HMI/UX designers and electrical/control engineers
• Safety managers, maintenance teams, and inspectors
• Training organizations and technical authors
• Regulatory bodies and procurement/specification writers

Related standards

• ISO 7296-1: General (graphical symbols for cranes)
• ISO 7296-2: Mobile cranes
• ISO 4306-3: Cranes - Vocabulary - Part 3: Tower cranes
• ISO 7000 / IEC 60417: Graphical symbol registries
• FEM 1.003 (industry symbol guidance)

Using ISO 7296-3 supports safer, more consistent crane operation by standardizing the visual language used on tower-crane controls, displays and documentation.