ISO 9374-5:1991 Crane Info for Overhead & Gantry Cranes

Information Manufacturers Must Provide

Kelude Heavy Industry manufactures its products in strict compliance with national standards. ISO 9374-5:1991 specifies that manufacturers of overhead and gantry cranes must supply the following technical information to users: Crane nameplate — permanently affixed in a visible location on the crane — including: model and serial number, date of manufacture, rated lifting capacity (t), work duty classification (A1~A8), span (m), lifting height (m), hoisting/travel speeds (m/min), and total machine weight (kg). The nameplate must be made of corrosion-resistant metal (such as stainless steel or aluminum) with legible, indelible markings. Lifting capability table (where applicable) — for luffing cranes (e.g., portal tower cranes), a load chart showing the rated lifting capacity at various working radii must be posted in a prominent location inside the operator cab. Technical specifications sheet — covering: motor power (kW) and speed (r/min) for each mechanism, reducer model and transmission ratio, wire rope type, diameter, and length, crane rail type and wheel load values, power supply method (conductor rail/cable) with voltage and frequency, and overall crane dimensions (L×W×H in mm). Installation drawings — including the rail layout plan (gauge, rail length, rail joint positions, and buffer locations), the general assembly drawing of the main girder and end carriage connection, and the foundation load diagram (wheel load values at each outrigger and the position/dimensions of foundation embedded parts). Electrical schematic — complete wiring diagrams for both main and control circuits, an electrical component list (model/specification/quantity/manufacturer), and terminal block numbers with their corresponding connections. Operation and maintenance manual — operating instructions (startup procedure, operating steps, and shutdown sequence), maintenance instructions (daily/monthly/annual inspection items and intervals), lubrication chart (lubrication points, grease grades, and re-lubrication intervals), troubleshooting guide (common faults with causes and remedies), wear parts list, and manufacturer contact information. The standard requires that all technical documentation be provided in both printed and electronic formats — printed copies delivered with the crane and electronic files supplied via email or an online platform.

Detailed Contents of the Technical Specifications Sheet

The standard provides detailed requirements for the technical specifications sheet: Hoisting mechanism — hoisting speed (full load/no load in m/min), hoisting motor model/power/speed/duty classification, reducer model and transmission ratio, drum diameter and rope capacity, and wire rope type and diameter. Travel mechanism (crane bridge) — travel speed (m/min), travel motor model/power/speed, reducer model and transmission ratio, wheel diameter and quantity (number of driving wheels and idler wheels), and crane rail type. Travel mechanism (trolley) — travel speed (m/min), travel motor model/power, reducer model, wheel diameter and quantity. Rail parameters — rail type (P/QU series — weight per meter in kg/m), gauge (span in mm), total rail length (m), rail joint configuration (butt joint/skewed joint), and rail fixing method (clamp plate spacing in mm). Wheel load — maximum wheel load (the highest load on a single wheel under the most unfavorable full-load condition, in kN) and minimum wheel load (the lowest load on a single wheel under no-load condition, in kN). Wheel load values are critical parameters for designing the rail foundation and selecting the appropriate rail type. Environmental conditions — ambient temperature range (°C) for which the crane is suitable, maximum relative humidity (%), altitude (m), and special environment ratings (explosion-proof/anti-corrosion/heat-resistant). The standard also requires that each parameter in the technical specifications sheet be annotated with its unit of measurement and the conditions under which it was measured (e.g., whether hoisting speed is rated at full load or no load) — ensuring users fully understand the meaning of each value. The technical specifications sheet must be presented on a separate page — not mixed with other documents — for easy reference and comparison.

Installation Drawing Requirements

The standard specifies the following requirements for installation drawings: Rail foundation drawing — including the cross-section of the rail foundation (foundation width, height, concrete strength grade C30~C50, rebar layout with diameter, spacing, and concrete cover thickness), anchor bolt position drawing (plan coordinates and elevation of each anchor bolt), and foundation top surface levelness requirement (≤1/1000). Rail layout plan — gauge (span) with its tolerance (±3mm), relative position and total length of both rails, rail joint positions and gaps, position and dimensions of rail end stops, and buffer positions and models. Crane general assembly drawing — main girder and end carriage connection details (bolt hole positions, bolt specifications, and tightening torque), relative position of the trolley frame and rails, electrical control cabinet mounting position, and operator cab or pendant control station location with cable routing. Foundation load diagram — forces (vertical and horizontal) exerted by each wheel on the rail and foundation under both maximum and minimum wheel load conditions, and the wheel load variation at each point as the crane travels along the rails (wheel load distribution at different trolley positions). The standard specifically requires that all dimensions in installation drawings be annotated with tolerances — including dimensional tolerances (e.g., ±3mm) and geometric tolerances (e.g., parallelism, perpendicularity, levelness) — as dimensions without tolerances cannot be controlled during installation. All drawings must be labeled in both English and Chinese (for international orders), with dimensions in millimeters (mm). The standard also requires the manufacturer to provide one set of installation drawings in an editable format (such as DWG or DXF) after crane delivery, enabling users to make secondary design modifications as needed.

Maintenance Manual Contents

The standard defines the following contents for the maintenance manual: Routine maintenance — pre-shift inspection items (brakes, wire rope, hook, limit switches), items to monitor during operation (abnormal vibration, abnormal noise, electrical indicators), and post-operation procedures (hook height positioning, power shut-off, rail clamp engagement). Periodic maintenance — a checklist of maintenance items for weekly/monthly/quarterly/annual intervals, detailed operating procedures and acceptance criteria for each item, and the required tools and measuring instruments (torque wrench, dial indicator, vernier caliper, megohmmeter, etc.). Lubrication chart — a diagram showing the location of each lubrication point on the crane, the grease/lubricating oil grade for each point, and the re-lubrication interval and quantity for each point. Cable and wiring inspection — inspection content for conductor rails or cable reels, wear limits for current collector carbon brushes, and inspection interval for cable sheaths. Hydraulic system (where applicable) — hydraulic oil grade and replacement interval, hydraulic filter element replacement interval, and hydraulic system pressure settings and adjustment procedures. Bolt inspection — tightening torque values and inspection intervals for all critical connection bolts (wheel bolts, coupling bolts, end carriage bolts, and rail clamp plate bolts). Troubleshooting guide — common faults (e.g., load slipping with the brake applied, abnormal noise from the reducer, motor failure to start, hook unable to lift) with their causes, diagnostic steps, and remedies — accompanied by a troubleshooting flowchart (fault symptom → possible cause → inspection method → corrective action). The standard also requires that the maintenance manual include a maintenance record form (with a sample format) that the user unit can photocopy for recording the maintenance item, date, and responsible person for each maintenance activity.

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