Top-Running Bridge Cranes
High-capacity single and double-girder bridge cranes engineered for extreme lifting capacity, maximum hook height, and heavy industrial duty cycles.
Engineering-Led Maintenance
Single-Source Industrial Overhead Crane Maintenance & Safety Compliance
Overhead cranes perform heavy-duty material movement under extreme operational cycles. Unplanned mechanical failures jeopardize plant productivity and workforce safety. Managing multiple vendors for structural engineering, electrical servicing, and safety compliance creates inefficiencies and increases operational risk.
RMH Systems delivers comprehensive overhead crane repair, engineering modernization, and certified compliance inspections. Backed by 80+ years of industrial material handling expertise, our factory-trained crane technicians inspect structural integrity, evaluate mechanical wear, rebuild hoists, and perform certified load testing in strict compliance with OSHA 29 CFR 1910.179 and ASME B30 international safety benchmarks.
Lifting Equipment Engineering
Industrial Overhead Cranes & Lifting Equipment We Service
Our certified engineers provide maintenance, load certification, and overhaul services for leading global crane brands including Demag, Gorbel, R&M, Harrington, CM, Caldwell, Aimco, and Vestil.
Underhung Cranes
Flexible suspension crane systems attached directly to roof building structures, optimizing floor space without requiring additional support columns.
Workstation Overhead Cranes
Lightweight enclosed-track bridge cranes designed for fast, ergonomic lifting at assembly workstations and light manufacturing cells.
Pillar & Wall Jib Cranes
Free-standing pillar and wall-bracket jib systems delivering 360-degree localized rotation for machinery loading and workstation support.
Gantry Cranes
Fixed and adjustable height gantry structures providing heavy lifting mobility across outdoor steel yards, shipping bays, and manufacturing floors.
Monorail Cranes & Track Systems
Linear overhead conveyor monorails engineered for continuous material transport across processing lines, paint booths, and assembly routes.
Safety Compliance & Engineering
Standard Operating Inspection Protocols
Our certified inspection methodology ensures complete adherence to international industrial lifting regulations, preventing catastrophic structural failures and operational downtime.
Structural & Runway Mechanical Evaluation
- Main Bridge Girders & Runway Rails: Inspection for structural deformation, fatigue cracks, rust, and beam deflection.
- Fasteners & Structural Welds: Ultrasonic and visual verification of load-bearing bolts, rivets, end stops, and connection plates.
- End Truck Wheels & Bearings: Measurement of wheel flange wear, flat spots, bearing play, and track alignment accuracy.
- Sheaves & Wire Rope Drums: Evaluation of groove wear, scoring, flange integrity, and drive shaft keyways.
Hoisting Equipment & Rigging Component Checks
- Hook Throat Opening Measurements: Precise dimensional checks for hook stretch, twist angle, and safety latch spring retention.
- Wire Rope & Load Chain Integrity: Quantitative assessment of broken wires, heat damage, stretching, kinking, and lubrication state.
- Mechanical & Electrical Braking Systems: Thickness testing of friction linings, air gap adjustment, torque checks, and motor brake response.
- Gearbox Drives & Couplings: Lubricant sampling, seal leak detection, backlash measurement, and noise profiling.
Electrical Systems & Variable Frequency Control
- Contactors & Relays: Thermal imaging and inspection for electrical arc pitting, oxidation, and loose terminal connections.
- Control Pushbutton Pendant & Radio Remotes: Functional verification of emergency stop circuits, spring returns, and signal stability.
- Festoon & Power Conductor Bars: Inspection of conductor shoes, cable hangers, strain relief wires, and insulation covers.
- Motor Insulation Resistance: Megohmmeter testing of hoist and drive motor windings to prevent electrical grounding faults.
Safety Interlocks & Certified Load Testing
- Upper & Lower Limit Switches: Mechanical trip testing of primary gear switches and secondary block-actuated limiters.
- Overload Protection Devices: Electronic load cell calibration verifying automatic power cutoff upon exceeding rated capacity.
- Audible & Visual Warning Alarms: Verification of flashing beacons, sirens, horns, and travel safety sensors.
- Proof Load Certification: On-site load testing up to 125% rated capacity using certified test weights with complete compliance reporting.
Compliance Planning
International Crane Inspection Schedule Standard
Different duty classifications require structured maintenance schedules to satisfy regulatory frameworks and warranty requirements.
| Inspection Protocol | Recommended Frequency | Qualified Operator / Inspector | Technical Scope & Focus | Operational Objective |
|---|---|---|---|---|
| Pre-Operational Inspection | Before every shift / daily | Certified Crane Operator | Visual & operational check of hoist brakes, wire rope, pendant controls, limit switches, and safety latches. | Immediate detection of obvious physical hazards prior to daily load lifting. |
| Frequent Inspection | Weekly to Monthly | Plant Maintenance Specialist | In-depth examination of high-wear mechanical parts, brake operation, hook distortion, and drive alignment. | Minimizes mechanical friction wear and prevents mid-production component failures. |
| Periodic Inspection | Quarterly to Semi-Annually | Factory-Trained Crane Engineer | Detailed structural integrity checks, electrical insulation testing, gearbox inspection, and fastener torque validation. | Detects internal material fatigue, electrical degradation, and structural stress. |
| Annual Engineering Audit | Annually (Mandatory) | Certified 3rd Party Inspector / RMH Specialist | Comprehensive system audit, non-destructive testing (NDT), limit switch validation, and official compliance documentation. | Fulfills mandatory OSHA, ASME B30, and ISO international safety compliance audits. |
Rapid Field Service & Spare Parts
Heavy Industrial Overhead Crane Repair & Modernization
When critical crane machinery suffers electrical failure or mechanical breakdown, production stops. RMH Systems maintains a dedicated inventory of genuine OEM replacement parts, specialized rigging tools, and rapid-response field engineers to quickly resolve emergency outages.
Beyond emergency repairs, we specialize in mechanical and electrical crane retrofits: converting obsolete contactor controls to variable frequency drives (VFD) for smooth acceleration, replacing worn wire ropes with high-tensile steel cables, installing radio remote controls, and re-engineering hoist drive assemblies for enhanced thermal rating.
- Emergency hoist, motor, and drive gearbox repair
- Wire rope re-reeving and synthetic rope installation
- Variable Frequency Drive (VFD) control retrofits
- Runway rail alignment and laser track adjustment
- OEM parts replacement for Gorbel, Demag, R&M, CM, and Harrington
Global Application Expertise
Heavy Industrial Sectors We Serve
Our crane engineering and maintenance programs are customized for demanding heavy-duty operating environments.
Steel & Metals Manufacturing
Heavy duty double-girder bridge cranes engineered for extreme heat, continuous duty cycles, scrap handling, and coil transport.
Automotive & Heavy Machinery
Precision workstation cranes, monorails, and intelligent lifting devices supporting high-speed assembly line integration.
Power Generation & Utilities
High-tonnage turbine room overhead cranes requiring ultra-fine micro-speed lowering controls during critical overhaul operations.
Chemical & Processing Plants
Explosion-proof overhead crane systems with spark-resistant copper-plated hooks and sealed electrical enclosures.
Port & Freight Terminals
Outdoor gantry and rail-mounted container handling cranes subjected to severe marine environment corrosion protection standards.
Warehousing & Distribution
High-speed material handling bridge cranes integrated with automated storage, sorters, and high-density racking networks.
Expert Guidance
Frequently Asked Questions
Key technical insights regarding overhead crane engineering, safety compliance, and global service capabilities.
What international safety standards govern your overhead crane services?
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Our engineering inspection and repair methodologies adhere to OSHA 29 CFR 1910.179, ASME B30 safety standards (B30.2, B30.11, B30.16, B30.17), CMAA Specifications 70 and 74, as well as ISO quality management frameworks for heavy industrial machinery.
How do certified load tests confirm structural safety?
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Certified load testing subjects the crane bridge, hoist, and runway rails to 125% of the rated capacity. During the test, engineers measure deflection, evaluate structural weld performance under stress, verify primary and secondary brake holding capability, and calibrate electronic overload limiters.
What are the primary warning signs that an overhead crane requires immediate service?
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Key indicators include unusual grinding or metallic screeching noises, erratic or jerky lifting movements, brake drift when holding loads, visible wire rope flattening or broken wires, excessive wheel flange wear, and intermittent control pendant response.
Can RMH Systems source genuine OEM replacement parts internationally?
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Yes. As a major systems integrator with direct global supply chain agreements, we supply OEM replacement parts, motors, wire ropes, hoists, brakes, and electrical VFD modules for brands like Gorbel, Demag, R&M, Harrington, CM, Aimco, Caldwell, and Vestil.
Why Partner With Us
The RMH Engineering Advantage
80+
Years of Leadership
Proven industrial automation expertise delivering measurable uptime since 1898.
100%
Certified Engineers
Factory-trained specialists equipped with certified load testing gear & diagnostic equipment.
OEM
Global Supply Chain
Direct distributor access to premium crane brands, hoists, and replacement components.
Turnkey
End-to-End Solutions
Single-source accountability covering initial system design, retrofit, maintenance, and audits.
Require Certified Overhead Crane Maintenance or Technical Support?
Connect directly with our senior material handling engineers to discuss your facility's crane repair requirements, safety compliance audits, or OEM spare parts integration.