Freestanding Single Girder Crane Application Practice in Cameroon Industrial Equipment Upgrade

Project Background

Advantages of Freestanding Cranes

1. Easy Installation

• No building structural reinforcement required

• Modular design for rapid on-site assembly

• Minimal production downtime

2. High Flexibility

• Adjustable position according to needs

• Adapts to different plant layouts

• Easy future migration or expansion

3. Cost-Effective

• No civil construction modifications needed

• Reduced infrastructure investment

• Fast ROI achievement

Technical Configuration Details

Steel Structure System

Freestanding Columns

• Design Load: ≥5 tons (including safety factor)

• Column Height: Customized (adapted to site)

• Anchor Bolts: M24×120 (with anchor plate)

• Stability: Wind load resistant design

Beam System

• Main Beam Section: Optimized H-shaped steel structure

• Crane Beam: 50×30 square steel rail support

• Connection Method: High-strength bolt connection

• Surface Treatment: Hot-dip galvanizing + anti-corrosion paint

Electric Hoist Configuration

Basic Parameters

• Model: EQ Series 5T Double-Chain Electric Hoist

• Lifting Height: 4 meters

• Operating Mode: Single-speed configuration

• Control Method: Dual control

Chain System

• Chain Count: Double chain

• Chain Material: High-strength alloy steel

• Safety Factor: 5:1

• Load Capacity: 5 tons

Dual Control System

Wired Control Unit

• Button Count: 6 buttons

• Control Functions: Lifting/Lowering/Crane Travel

• Cable Length: Customized according to column height

• Protection Rating: IP65

Wireless Remote Control

• Communication Protocol: 2.4GHz/433MHz

• Control Distance: ≤50 meters

• Response Time: <100ms

• Battery Type: Rechargeable lithium battery

• Battery Life: ≥8 hours continuous operation

Power Supply System Details

Busbar Configuration

• Length: 7 meters

• Specification: 4×10mm² copper conductor

• Type: Seamless busbar

• Rated Current: 50A

Accessory List

• Busbar Bracket: 1 per meter

• Current Collector: Complete carbon brush assembly

• Connector: Intermediate connection terminal

• Fixing Clip: Distributed evenly along the line

• Power Inlet Box: With protective cover

• Current Collector: Mobile current receiving device

Safety Protection Measures

• 36V safety control voltage

• Overload protection circuit breaker

• Dual emergency stop configuration

• Travel limit switches

• Buffer stop devices

Installation Technical Points

1. Column Verticality: ≤1/1000

2. Rail Levelness: ≤1/1000

3. Rail Parallelism: ≤2mm (full length)

4. Busbar Straightness: ≤1mm/meter

5. Electrical Continuity: Resistance ≤0.01Ω

Test Acceptance Standards

• No-load running test: 10 times in each direction

• Rated load test: 125% overload test

• Safety braking test: Distance ≤100mm

• Electrical insulation test: ≥10MΩ

Project Results

• Installation & Commissioning Time: 2 days

• Test Acceptance: Passed on first attempt

• Customer Satisfaction: Extremely high

Technical Specifications

• Hoist: EQ Series 5T Double-Chain Electric Hoist

• Control: 6-Button Pendant + Wireless Remote

• Power: 380V 50Hz 3-Phase AC

• Safety: 36V control voltage