ISO 9374-6:1991 Info Required for Jib Cranes
ISO 9374-6:1991 "Cranes — Information to be provided — Part 6: Jib cranes" is the governing standard for jib crane information disclosure. Building on ISO 9374-4, it defines the technical information, installation details, and operation and maintenance requirements that manufacturers must supply for jib cranes, including portal cranes, mast cranes, and deck cranes, based on their structural and operational characteristics.
Jib Crane Nameplate Data Requirements
ISO 9374-6:1991 specifies that the jib crane nameplate must include the following: manufacturer name and address, equipment model and serial number, year of manufacture, rated lifting capacity curve (rated load at each working radius), maximum load moment, radius range (maximum and minimum working radius), lifting height curve, total dead weight and counterweight weight, work duty classification (A1 to A8), and the applicable design standard designation. The nameplate shall be made of stainless steel or aluminum alloy and mounted in a prominent location on the portal base columns (at the bottom section of the tower mast or beneath the slewing platform). Minimum nameplate character height is 5 mm.
For knockdown jib cranes (such as mast cranes and large portal cranes), the standard further requires individual identification on major structural components — the mast shall carry its component number and dead weight, the boom shall be marked with its length and identification number, and each counterweight block shall show its weight. Wire rope drums shall be labeled with the rope specification (diameter, construction, and tensile strength). An operating condition plate shall be installed inside the operator cabin, displaying the load-radius curve, lifting height curve, and hoisting mechanism speed chart.
Technical Specification Data for Jib Cranes
The standard requires manufacturers to provide technical specifications covering jib-crane-specific parameters: clear height and width of gantry (governing clearance for traffic beneath the crane), tail swing radius (determining minimum working space requirements), track gauge and wheelbase (for rail-mounted travel configurations), maximum and minimum wheel load (serving as the design basis for foundations), and anchoring force requirements under maximum wind load in non-working condition. The parameter table shall also include transport dimensions and weights for each major component to facilitate logistics planning.
Jib crane speed parameters — lifting speed (at rated load and no-load), derricking speed (luffing time for both wire rope luffing and hydraulic cylinder luffing), slewing speed (maximum rotational speed, acceleration and deceleration time), and travel speed (for rail-mounted or rubber-tired travel). Each speed parameter shall be provided for both rated load and no-load operating conditions. All technical parameters shall be expressed in SI units with values rounded to three significant figures. Kelude Heavy Industry's Technical Specification for jib cranes covers all of the above parameters.
| Information Category | Content | Delivery Format | Application |
|---|---|---|---|
| Nameplate | Model Parameter/Curve | Stainless Steel Nameplate | Equipment Identification |
| technical specifications | Dimensions/Weight/speed | Hard Copy+Electronic | selection/Foundationdesign |
| Load Curve | Each Working radius Lifting Capacity | Laminated Drawing | Cab operation |
| installation drawings | Foundation/Crane Rail/Assembly | Blueprint+Electronic | Site Installation |
| Operation Manual | Operation/Safety/Emergency | A4Binding | Routine Operation |
| Maintenance Manual | Maintenance/Lubrication/Spare parts | A4Binding | Inspection & Repairmaintenance |
Installation and Foundation Requirements
Manufacturers are required to supply complete installation information, including foundation drawings (Portal crane rail foundation layout, embedded part positions, and load parameters), installation steps (hoisting sequence for each component, bolt pretightening torque, and assembly clearance requirements), commissioning procedures (no-load and load testing steps for each mechanism), and acceptance standards (post-installation test items and evaluation criteria). For traveling jib cranes, the documentation must cover crane rail installation technical requirements — rail type, track gauge tolerance, joint specifications, and grounding requirements.
Mast Crane installation information must also include mast base anchoring methods, cable system layout and tension requirements, anchor point positions for each guy wire, and ground anchor loads. Floating Crane installation information covers pontoon stability parameters (overturning moment and metacentric height under maximum suspended load and maximum working radius conditions), mooring system arrangement, and ballasting plans. All installation drawings must be marked with version numbers and design approval signatures, with each drawing linked to the crane's Serial Number.
Operation and Maintenance Manual
The Operation Manual must include jib crane-specific operating instructions — procedures for different boom length combinations and attachment configurations (operating limits after boom extension sections or fly jib installation), procedures for specific operating conditions (load stabilization when lifting heavy items and wind direction considerations, wave and wind effects during marine operations), and emergency operations (emergency lowering during engine failure, manual release of the hydraulic system when pressure is lost, and emergency slewing to a downwind position).
The Maintenance Manual must cover jib crane-specific maintenance tasks — periodic inspection of the Slewing Bearing (tooth flank wear, bolt pre-tightening torque, and raceway clearance checks), cable system inspection and adjustment (tension detection for each guy wire and tensioning adjustment intervals), and crane rail inspection plus wheel flange wear measurement for the portal base travel mechanism. Kelude supplies a complete information package with every jib crane at the factory — Stainless Steel nameplate, Load Curve chart, A4 operation and maintenance manual, installation drawings, Spare Parts List, and electronic version of all technical documentation.
| Manual Section | Jib Crane / Boom Crane Special Features | Importance |
|---|---|---|
| safe operation | Various Boom Lengths/Jib Operation Limits | High |
| Specificoperating conditions | Oversized Load Hoisting/Over-Water Operation | High |
| emergency operation | emergency lowering/manual release/Slewing Downwind | High |
| Slewing Bearingmaintenance | Tooth Surface/Bolt/Clearance Check | High |
| cable system | Tension of Lashing/adjustment Period | Medium |
| Crane Railmaintenance | Track Gauge / Rail Gauge/Wear/Basic Inspection | Medium |
Frequently Asked Questions
Q: What are the special nameplate requirements for a jib crane?
A: In addition to the general information, the nameplate must include the lifting capacity vs. working radius curve, maximum load moment, and lifting height curve. Detachable components (mast/boom/counterweight) are individually marked with their part numbers and dead weight. An operating conditions plate is provided inside the operator cabin. The nameplate is made of stainless steel and fixed in a prominent position on the portal base columns.
Q: How do the technical specifications differ from those of a mobile crane?
A: Jib crane-specific parameters include: portal clearance height and width, tail swing radius, track gauge and wheelbase, maximum/minimum wheel load, and anchoring force in non-working condition. For mast cranes, cable system tension parameters must also be provided. Kelude Heavy Industry's Technical Specification covers all of these parameters.
Q: What should the installation information include?
A: Foundation drawings (rail foundation/embedded parts), installation steps (hoisting sequence/bolt torque/assembly clearance), commissioning procedure, and acceptance standard. For mast cranes, include cable layout and ground anchor loads; for floating cranes, include pontoon stability and mooring arrangements.
Q: What jib-specific content is covered in the operation manual?
A: Operating limits for different boom length configurations and fly jibs, heavy-lift and load-sway control procedures, wave and wind effects for offshore operations, emergency lowering and manual release, and cable system tension adjustment. The Kelude Heavy Industry jib crane operation manual covers all standard-required sections.
