ISO 7752-4:1989

Overview

ISO 7752-4:1989 - Cranes - Controls - Layout and characteristics - Part 4: Jib cranes defines the layout, direction of movement and basic operating characteristics of controls used on jib-type cranes. It establishes consistent arrangements for the primary controls for travelling, slewing, luffing, hoisting and lowering to reduce operator confusion and improve safety. The standard applies to jib cranes as defined in ISO 4306-1 and refers to the general principles set out in ISO 7752-1.

Key topics and requirements

• Control scope: Arrangements for basic crane functions - travel, slew, hoist (main/auxiliary), luff - including hand levers and foot pedals. Applies to fixed-length and articulated jib cranes.
• Direction of movement: Specifies how lever movement relates to crane motion (e.g., move lever in the direction of travel when lever movement is aligned with crane travel; centre lever to stop and apply the brake).
• Slewing controls:
  • For fore-and-aft levers: move forward to slew toward the jib (with operator position considerations).
  • For side-to-side levers: move left to slew left and right to slew right.
  • Centre position: allows free slew or holds position as applicable.
• Hoist controls: Move rearward to raise; forward to lower when power lowering is fitted; centre to release power and apply brake. Separate control assignment for main and auxiliary hoists (lever 4 main, lever 3 auxiliary when provided).
• Luff controls: Move rearward to luff in, forward to luff out; centre to stop luffing.
• Brake and pedal use: Where automatic brakes are not provided, foot pedals are used to apply brakes. Depress pedal to slew or hold position where specified.
• Human factors / force limits: Control forces must not exceed 100 N for handles and control levers and 200 N for foot pedals - supporting ergonomics and operator safety.
• Diagrams and labeling: Standard provides schematic control layouts for bi-directional and multi-directional control schemes; direction of movement must be identified at each control position.

Applications and users

ISO 7752-4 is practical for:

• Crane manufacturers and designers specifying control layouts and operator interfaces for jib cranes
• Safety engineers and compliance officers aligning equipment with international crane control ergonomics and safety expectations
• Plant owners and maintenance teams implementing standardized control labeling and operator training
• Standards bodies and procurement teams specifying requirements for new crane purchases

Related standards

• ISO 7752-1:1983 - Controls - General principles (mandatory companion)
• ISO 4306-1:1985 - Lifting appliances - Vocabulary - General (definition of jib-type cranes)

Keywords: ISO 7752-4, jib cranes, crane controls, controls layout, slewing, luffing, hoisting, operator controls, crane safety, ergonomics.