Introduction: When Critical Equipment Fails, Is Your Repair Bay Ready?

Imagine this: a critical production line grinds to a halt. The culprit is a failed gearbox in a central machine, a solid block of metal and gears weighing several tons. Your skilled repair team is ready, but a fundamental question arises: how do you safely and efficiently lift this heavy, expensive, and often awkwardly shaped component? Rushing to rent mobile cranes is costly and time-consuming. Relying on improvised methods is a safety gamble.

This scenario highlights a common yet critical challenge faced by maintenance managers, facility owners, and workshop foremen across industries: the need for dependable, on-demand lifting capacity for unscheduled repairs. The constraints are clear:

• Lifting needs are infrequent but unpredictable, making major investment in fully automated crane systems hard to justify.
• Workshop spaces can be tight, with limited power infrastructure or areas where electrical installation is impractical.
• Budgets are always watched, yet safety is non-negotiable—a secondary accident during repair is unacceptable.
• The parts themselves—motors, pumps, presses, vehicle chassis—are often unbalanced, delicate, or irregularly shaped, demanding precise and stable handling.

For these real-world challenges, Dongqi Crane offers a purpose-built solution: the 5-20 Ton Manually Operated Double Girder Overhead Crane. This is not merely a tool; it is essential infrastructure for your repair facility. Think of it as a cost-effective insurance policy—always on standby, requiring little upkeep, ready to safeguard your assets and personnel when it matters most. It provides the reliable muscle to turn a repair crisis into a managed, efficient operation.

Chapter 1: The Ideal Workshop Partner – Why “Manual” + “Double Girder” is the Smart Combo

1.1 The Ingenuity of “Manually Operated”: Simplicity is the Ultimate Sophistication
The choice of manual operation is a deliberate design philosophy centered on robustness and autonomy, far beyond just cost-saving.

• Power Independence: It liberates your repair bay from the electrical grid. Whether during a planned outage, an emergency power-down, or in a remote section of the workshop, your lifting capability remains fully operational. There are no control panels to fail, no variable frequency drives to malfunction.
• Unmatched Reliability: With a purely mechanical system—geared hand chain hoists, manually pushed trolleys—the points of potential failure are drastically reduced. This simplicity translates to extreme durability, especially in the demanding environments of repair shops where dust, moisture, and oil mist are common. It performs reliably where more complex electrical systems might falter.
• True Cost-Effectiveness: The savings are multi-layered: lower initial purchase price, minimal installation cost (often no need for expensive power feeds or conductive bars), and significantly reduced long-term maintenance expenses. You invest in solid mechanics, not delicate electronics.
• Intuitive Control & Enhanced Safety: The operator develops a direct physical feel for the load through the hand chain. Movement is inherently smooth and controlled, allowing for millimeter-perfect positioning—a crucial advantage when aligning a heavy shaft into a tight bearing housing. The slow, deliberate pace minimizes load swing, increasing safety in congested spaces.

1.2 The Assurance of the “Double Girder” Design: Stability is Paramount
While manual operation provides control, the double girder structure provides the foundational stability that repair work demands.

• Superior Rigidity: Two full-width girders, connected by robust end trucks, create a box-like structure with exceptional resistance to twisting and bending. Compared to a single girder, this design ensures minimal deflection under load, keeping your valuable component steady.
• Smooth and Predictable Movement: The trolley runs on a wide, stable rail atop the two girders. Even when pushed by hand, the load travels in a straight, controlled line, preventing dangerous sway that could damage the load or surrounding equipment.
• Versatility for Complex Lifts: The space between the two girders easily accommodates a variety of lifting attachments—spreader beams, lifting slings, or custom fixtures—necessary for handling oddly shaped engines, wide fabrications, or long pipe sections safely.
• Dongqi’s Build Promise: Our manually operated cranes are built to the same structural principles as our powered ones. We use full-box double girders, fabricated from high-grade steel and carefully welded to ensure long-term integrity. This crane is designed to be a permanent, unwavering asset in your facility.

Chapter 2: Meeting Repair Challenges Head-On – Dongqi’s Targeted Engineering

2.1 Challenge: Diverse Loads and Zero-Compromise Safety

• The Dongqi Solution: A Scalable Range with Certified Components. Our 5-20 ton range allows you to select capacity based on your heaviest anticipated repair job. Every crane, regardless of tonnage, is built around a core of high-performance, name-brand hand chain hoists. Critical safety components like hooks, load chains, and wheels are subject to rigorous in-house and third-party inspection. The entire assembly is designed and documented to meet CE mark requirements, providing an auditable trail of safety assurance for every lift.

2.2 Challenge: Harsh Environments and the Need for Durability

• The Dongqi Solution: Protection Built-In.
  • Quality Materials: Primary structures use durable steel, selected for its strength-to-weight ratio and longevity.
  • Advanced Surface Preparation: All structural components undergo thorough shot blasting to remove mill scale and rust, creating the ideal surface for paint adhesion.
  • Robust Paint System: We apply a high-quality, corrosion-inhibitive primer and a tough, chemical-resistant topcoat. This finish protects against the oils, coolants, and varying humidity typical of workshop environments, ensuring years of service without significant corrosion.

2.3 Challenge: Easy Installation and Spatial Constraints

• The Dongqi Solution: Modular and Adaptable Design. Our cranes are designed for straightforward installation. Major components are pre-assembled and tested at our factory. We offer a wide array of standard spans and lifting heights, and our engineering team can provide custom solutions for unique bay layouts. The goal is to provide maximum utility with minimal disruption to your existing workspace.

Chapter 3: The Invisible Shield – The Safety Philosophy Behind the CE Mark

3.1 What CE Certification Truly Means for a “Manual” Crane
The CE mark on a Dongqi manually operated crane is not just a sticker for export; it is the culmination of a rigorous, legally mandated safety process governed by the EU Machinery Directive. It signifies that the crane is not only safe to use but has been proven so through analysis and testing.

• Structural Integrity Guaranteed: The crane’s design is validated through engineering calculations (using standards like EN 13001) to withstand its rated load with a significant safety margin, under all permissible configurations and movements.
• Mechanical Safety by Design: Hazards are addressed at the source: gears are enclosed, pinch points are guarded, and reliable mechanical stops are in place to prevent over-travel.
• Clear Information for Safety: The crane is delivered with permanent, unambiguous safety labels, capacity charts, and detailed instruction manuals (in the required languages), ensuring it can be installed, used, and maintained correctly.

3.2 The Dongqi Commitment: A Culture of Compliance
For Dongqi, CE compliance is a core part of our manufacturing DNA, not an afterthought.

• Process Integration: Safety is engineered in from the initial CAD model. Our quality management system governs material sourcing, production, final assembly, and load testing.
• Documentation You Can Trust: With each crane, you receive a complete Technical Construction File and an EU Declaration of Conformity. These are your guarantees that the product is legally and technically certified.
• The Bottom Line: Choosing a CE-marked Dongqi crane means investing in a verified safe working environment. It is a decisive step in protecting your most valuable assets: your people and your equipment.

Chapter 4: Calculating the Smart Investment – Total Cost of Ownership

Investing in a Dongqi manually operated double girder crane is a financially astute decision that pays dividends over its entire lifespan.

• Lower Capital Expenditure: Compared to an electric overhead crane, the initial savings on the equipment itself and the avoided costs of electrical installations (conduit, cabling, power feeds) are substantial.
• Negligible Operating Costs:
  • Zero Energy Consumption: It operates on human power, adding no cost to your utility bill.
  • Minimal Maintenance: The simple mechanical design requires only periodic lubrication and basic visual inspections. There are no motors, contactors, or drives to service or replace.
• Long Asset Life & High Residual Value: Built from heavy-duty materials with a protective finish, these cranes offer an exceptionally long service life. Their simplicity and durability also mean they retain functional and resale value for decades.
• Intangible ROI:
  • Repair Autonomy: Eliminate delays and high hourly costs from external crane rentals. Gain the ability to respond to breakdowns immediately, slashing machine downtime.
  • Risk Mitigation: A proper, certified lifting solution drastically reduces the likelihood of costly accidents, injuries, and collateral damage.

Conclusion & Your Next Step

The Dongqi 5-20 Ton Manually Operated Double Girder Crane represents a pragmatic, powerful, and proven solution for the real-world demands of equipment repair and maintenance. It is the embodiment of focused engineering: delivering exactly the right capabilities—reliability, stability, and safety—without unnecessary complexity or expense.

It stands ready as the dependable partner in your workshop, ensuring that when a critical repair is needed, your team has the safe, controlled, and cost-effective lifting power to get the job done right.

Ready to strengthen your repair capabilities?

1. Contact Us for a Free Workshop Assessment. Share your bay dimensions and typical repair loads. Our engineers will provide a no-obligation recommendation for the optimal crane capacity and span.
2. Download the Detailed Specification Portfolio. Access complete technical data, configuration options, and CE certification details for our full range of manual cranes.
3. Request a Reference Visit. Speak directly with our customers who have integrated Dongqi manual cranes into their daily operations.

Dongqi Crane – Lifting Solutions, Built on Reliability.

Product Parameters

(t)Liftingweight	(m)span	lifting   height	a steel  track width	(mm)Basic Size hook limit size Pulling force												cart wheel pressure	total weight
				B	BQ	H	A	Bx	K	h	L1	L2	Iift	handcart	cart
				≤
t	m	m	mm	mm									Kg			KN	t
5	10	10 16	40 50	2200	2800	1100	160	1300	1300	680	980	1020	37	10	30	33.5	3.45
	11															34.2	3.64
	12															35.2	4.04
	13															36.3	4.25
	14															38.3	4.78
	15															38.6	5.00
	16															40.1	5.64
	17															41.0	5.89
10	10		60 70										53	16	35	56.7	3.79
	11															57.6	4.00
	12															59.7	4.60
	13															60.7	4.85
	14															62.3	5.30
	15															63.1	5.57
	16															65.0	6.25
	17															65.9	6.54
16	10		60 70	2600	3200	1250	170	1500	1600	800	1000	1260	58	25	25	88	5.12
	11															89	5.48
	12															91.2	5.98
	13															93.4	6.28
	14															96.2	7.21
	15															97.6	7.56
	16															99.6	8.21
	17															101.0	8.57
20	10		60 70										64	29	30	103	5.45
	11															111.3	5.75
	12															113.4	6.30
	13															115.2	6.63
	14															117.8	7.47
	15															119.4	7.85
	16															122.3	8.74
	17															124.3	9.55