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304 North Cardinal St.
Dorchester Center, MA 02124
Crane Load-Bearing Beam Box
Our Crane Load-Bearing Beam Box is a factory-direct solution engineered for maximum strength, stability, and long-term reliability in demanding lifting applications. Widely used in factories, ports, metro construction, and heavy industrial workshops, this load bearing beam, crane beam box, overhead crane components, and lifting beam systemeffectively solve issues of uneven load distribution, structural deformation, and safety risks during heavy lifting operations. Manufactured with high-grade steel and strict quality control, the product delivers consistent performance and can be supplied with complete mechanical drawings for accurate installation and integration. We offer guaranteed after-sales support, and each production order is followed by a dedicated specialist to ensure clear communication, on-time delivery, and full traceability from manufacturing to final shipment.
- Source factory design and customization
- High-quality multi-layer monitoring
- Worry-free after-sales service and reliable cooperation
- Expert remote online guidance
- A team of engineers with decades of experience
- Professional mechanical drawing services are available
Crane Load-Bearing Beam Box
Factory-direct Structural Components · High Strength · Precision-Fabricated Steel Box Girders
With extensive experience in manufacturing crane structures, we supply Factory-direct Crane Load-Bearing Beam Boxes engineered for overhead cranes,
gantry cranes, bridge launchers, and heavy industrial lifting systems. These welded steel box beams provide the primary structural support for crane loads,
ensuring stability, rigidity, and long-term reliability under demanding working conditions.
Our load-bearing beam boxes are fabricated using high-strength steel plates, CNC cutting,
automatic welding, and strict deformation control to guarantee structural accuracy and fatigue resistance.
Product Advantages
High structural strength
Box-girder construction offers superior load capacity, torsional stiffness, and bending resistance.
Factory-direct precision fabrication
CNC plate cutting, robotic welding, and ultrasonic testing ensure consistent quality.
Excellent fatigue resistance
Designed to withstand long-term cyclic loads from hoisting, travel, and dynamic forces.
Customizable dimensions
Length, height, section thickness, and reinforcement plates can be adapted to various crane types.
Corrosion-resistant surface treatment
Shot blasting, epoxy primer, and industrial coatings extend service life.
Technical Parameters
| Model | Beam Height (mm) | Beam Width (mm) | Plate Thickness (mm) | Steel Grade | Welding Method | Max Load (t) | Applications |
| CBB-600 | 600 | 300–500 | 6–10 | Q235/Q345 | Automatic MIG | 5–10 | Light overhead cranes |
| CBB-800 | 800 | 350–600 | 8–14 | Q345/Q355 | Automatic MIG + UT | 10–20 | Single-girder & small gantry cranes |
| CBB-1000 | 1000 | 400–700 | 10–16 | Q345B/Q355B | Submerged-arc welding | 20–40 | Double-girder cranes |
| CBB-1200 | 1200 | 500–800 | 12–20 | Q355/Q420 | SAW + UT | 40–80 | Heavy duty gantry cranes |
| CBB-1500 | 1500 | 600–900 | 14–25 | Q420/Q460 | SAW + Full Inspection | 80–150 | Bridge launchers / beam lifters |
| Custom | 600–2000 | 300–1200 | Per requirement | Q235–Q460 | Customized | 5–300 | Special cranes / rail-mounted systems |
Applications
Overhead crane main girders
Gantry crane main beams
RMG/RTG structural beams
Bridge launchers & beam lifters
Industrial structural steel frameworks
Rail-mounted equipment and heavy machinery
What Problems Can the Crane Load-Bearing Beam Box Solve?
Prevents beam deformation under dynamic loads
Reduces crane vibration for safer operation
Ensures long-span stability for overhead & gantry cranes
Improves structural rigidity and fatigue life
Supports high-capacity lifting with minimal deflection
Why Choose Us?
Q1: What makes your box beams more durable?
A1: We use high-grade steel, robotic welding, and full non-destructive testing to ensure long-term structural stability.
Q2: Can the beam box be customized?
A2: Yes, dimensions, steel grades, reinforcement, and connection details can be customized according to crane design.
Q3: Do your beams support heavy-duty cranes?
A3: Absolutely—our premium-grade beams support lifting capacities up to 300 tons or more.
Q4: Can you assist with structural selection?
A4: Yes, engineers provide remote guidance for model selection and technical matching.
After-Sales Service — Crane Load-Bearing Beam Box
Remote technical guidance for installation and structural alignment
Video support for welding inspection and assembly processes
Factory demonstration of fabrication and quality-testing procedures
Long-term engineering assistance for crane structural maintenance
FAQ – Crane Load-Bearing Beam Box
Q1: What steel grades are commonly used?
A1: Q235, Q345, Q355, Q420, and Q460 depending on load requirements.
Q2: How is the welding quality ensured?
A2: Robotic MIG/SAW welding, ultrasonic testing, and straightness/deformation inspection.
Q3: Do you provide beams for long-span cranes?
A3: Yes, customized box beams for 20–60+ m spans are available.
Q4: Can surface coating be customized?
A4: Yes, including epoxy, polyurethane, zinc-rich primer, or maritime-grade coatings.
