LD Type Electric Single-Girder Bridge Crane: Tonnage Specs & Prices
Key Points LD-type single-girder electric overhead cranes offer lifting capacities from 1 to 20 t, spans from 7 to 30 m, and lifting heights from 6 to 30 m, using a CD1/MD1 electric hoist as the hoisting mechanism. Reference pricing: 1 t approx. $3,000–$7,400; 5 t approx. $7,400–$14,800; 10 t approx. $14,800–$26,700; 20 t approx. $26,700–$51,900. Units with a lifting capacity ≥ 3 t and a lifting height ≥ 2 m fall under special equipment supervision (TSG Q7016-2016).
LD-Type Single-Girder Electric Overhead Crane Product Line
The LD-type single-girder electric overhead crane consists of a single main girder, two end carriages, a CD1 or MD1 electric hoist, a crane travel mechanism, and an electrical control system. The main girder features a box structure with an I-beam welded to its bottom flange, which serves as the runway rail for the electric hoist trolley. The hoist travels along the lower flange of the I-beam for cross-travel movement, while the crane bridge moves along the runway rails for long-travel movement, together providing rectangular coverage for material lifting operations. The LD-type crane offers a compact structure, low dead weight, and minimal load requirements on the factory building — making it the go-to equipment for light-to-medium indoor material handling in workshops, warehouses, maintenance bays, and assembly lines. Compared with double-girder bridge cranes (QD-type), the LD-type offers lower manufacturing costs, shorter installation cycles, and reduced headroom requirements, making it particularly well-suited for indoor handling applications up to 20 t. Its hoisting mechanism uses a CD1 or MD1 electric hoist: the CD1 provides single-speed hoisting (8 m/min), while the MD1 provides two-speed hoisting (8/0.8 m/min), allowing flexible configuration based on process requirements.
LD-Type Crane Specifications and Price Reference by Capacity
LD-type single-girder electric overhead cranes are available in seven standard lifting capacities — 1 t, 2 t, 3 t, 5 t, 10 t, 16 t, and 20 t — with twelve standard spans: 7 m, 8 m, 10 m, 12 m, 14 m, 16 m, 18 m, 20 m, 22 m, 25 m, 28 m, and 30 m. Standard lifting heights are 6 m, 9 m, 12 m, 18 m, 24 m, and 30 m. Long travel speed can be selected based on the operation mode and operating conditions: 20 m/min (floor handle), 30 m/min (remote control), or 45 m/min (remote control + operator's cab). In terms of pricing, the overall cost of an LD-type crane increases in a stepped pattern as lifting capacity and span increase. The following are market reference price ranges (including the CD1 electric hoist, excluding installation, freight, and runway rail installation): - **1 t LD-type single-girder electric overhead crane:** approx. $3,000–$7,400 — suitable for small maintenance bays and light material handling. - **3 t LD-type:** approx. $4,400–$10,400 — a common specification for workshop assembly lines. - **5 t LD-type:** approx. $7,400–$14,800 — a popular capacity for warehouses and general manufacturing. - **10 t LD-type:** approx. $14,800–$26,700 — a workhorse for heavy-duty warehouses and processing workshops. - **16 t LD-type:** approx. $22,200–$37,100 — suited for lifting larger components. - **20 t LD-type:** approx. $26,700–$51,900 — the largest LD-type configuration, approaching the selection boundary for light double-girder bridge cranes.
LD-Type vs. QD-Type vs. LH-Type Overhead Crane Comparison
When selecting an overhead crane, the LD-type single-girder electric overhead crane is often compared with the QD-type electric double-girder bridge crane and the LH-type electric hoist bridge crane. These three types serve different positioning and application scenarios: **LD-type single-girder electric overhead crane:** Lifting capacity 1–20 t; single main girder + I-beam rail + electric hoist configuration. Simple, cost-effective structure ideal for light-to-medium indoor handling. Requires minimal headroom and installs quickly. Places lower loads on factory corbels, reducing civil construction costs. Operation is primarily via floor-mounted remote control, with an optional operator's cab. **QD-type electric double-girder bridge crane:** Lifting capacity 5–500 t; twin main girder trolley configuration. The hoisting mechanism uses a dedicated winch rather than an electric hoist, delivering higher load-bearing capacity and work duty (A5 to A7). Suited for heavy industry, metallurgy, casting, and similar demanding applications. Significantly more expensive than the LD-type, with higher headroom and corbel load requirements — the right choice for high-capacity, high-frequency, high-accuracy applications. **LH-type electric hoist bridge crane:** Lifting capacity 5–32 t; twin main girder configuration but retains an electric hoist (CD1/MD1 or HC-type) as the hoisting mechanism — positioned between the LD-type and QD-type. It preserves the cost advantage of using an electric hoist while benefiting from the improved rigidity and larger span capability of a twin-girder structure. Suitable for projects with moderate capacity and span requirements where a QD-type crane would exceed the budget. **Selection principle:** Choose the LD-type for lifting capacities ≤ 20 t, work duty A3 to A5, and non-continuous operation. Consider the LH-type for capacities between 5 and 32 t where greater span and rigidity are needed. Select the QD-type for capacities > 20 t, work duty A6 or higher, or frequent continuous operation.
Application Scenarios and Selection Recommendations
LD-type single-girder electric overhead cranes are suitable for the following scenarios: parts and semi-finished product lifting in general manufacturing workshops, cargo loading/unloading in finished goods warehouses, equipment disassembly and assembly in maintenance bays, material transfer on assembly production lines, routine handling in light industrial facilities (food, textile, electronics, etc.), and equipment maintenance and hoisting in power plants and hydroelectric stations. Key selection considerations include the following: **Lifting capacity** — select based on the heaviest actual load, with a recommended 10%–15% safety margin. **Span** — determine based on column spacing and the actual working area; a larger span directly affects main girder depth and total machine weight. **Lifting height** — determined by the highest lifting point and available headroom; the LD-type standard lifting height ranges from 6 to 30 m. **Work duty** — the frequency of operation determines whether to select A3, A4, or A5. **Operation mode** — a floor handle suits simple, low-frequency applications; remote control offers greater convenience and flexibility; an operator's cab is recommended for applications requiring precise positioning.
Special Equipment Management and Supervision Inspection
According to《Special Equipment Safety Law of the People》and relevant technical specifications,whenLDthe lifting capacity of the type electric single-girder bridge crane≥3tand lifting height≥2mHour,falls within the scope of special equipment management,the user unit shall complete use registration,periodic inspection, and certified operation procedures for operators.Lifting Capacity3tbelow and lifting height less than2mfalling within special equipment managementLDtype crane is not within the scope of special equipment management,no special equipment procedures are required.falling within special equipment managementLDtype crane shall notify the local special equipment supervision authority before installation,after installation, it may only be put into service upon passing supervision inspection.the periodic inspection interval is once every two years,the inspection basis isTSG Q7016-2016《Supervision Inspection Rules for Installation, Retrofit, and Major Overhaul of Lifting Appliances》andTSG Q7015-2016《Periodic Inspection Rules for Lifting Appliances》.the user unit shall establish a safety management file,including the product certificate,installation notification,supervision inspection report,daily inspection and maintenance records, etc..in daily use,operators shall hold special equipment operator certificates of the corresponding category,strictly operate in accordance with safety operating procedures,before daily operation, the brake,Wire Rope,Hook,and safety devices such as limit switches shall be inspected.Kelude Heavy Industry, upon delivery ofLDtype electric single-girder bridge crane, provides complete technical documentation and Factory Acceptance Test Report,and may assist the user unit in completing installation notification and inspection application procedures.
| Model | Lifting Capacity(t) | Span(m) | Lifting Height(m) | travel speed(m/min) | Work Duty / Classification | price reference(ten thousand yuan) |
|---|---|---|---|---|---|---|
| LD1-7~22.5 | 1 | 7~22.5 | 6~18 | 20/30/45 | A3~A5 | 2~5 |
| LD5-7~28 | 5 | 7~28 | 6~24 | 20/30/45 | A3~A5 | 5~10 |
| LD10-7~28 | 10 | 7~28 | 6~24 | 20/30/45 | A4~A5 | 10~18 |
| LD16-10~28 | 16 | 10~28 | 6~24 | 20/30 | A4~A5 | 15~25 |
| LD20-10~30 | 20 | 10~30 | 6~24 | 20/30 | A4~A5 | 18~35 |
covering light to medium hoisting needs
fits standard factory building widths
1t base configuration at a low cost
3t and above requires special equipment registration
CD1 single-speed or MD1 two-speed electric hoist
workshops, warehouses, maintenance bays, etc.
FAQ
Q: What is the maximum lifting capacity of the LD-type single-girder electric overhead crane?
A: The standard maximum lifting capacity of the LD-type single-girder electric overhead crane is 20t. For loads above 20t, the LH-type electric hoist bridge crane or the QD-type double-girder bridge crane is recommended. On 16t and 20t models, the main girder uses a reinforced structural design, and the long-travel speed is limited to 20–30 m/min to ensure stable operation.
Q: Is the LD-type crane classified as special equipment? What inspection procedures are required?
A: When the LD-type single-girder electric overhead crane has a lifting capacity of ≥3t and a lifting height of ≥2m, it falls under special equipment management and must be registered for use and undergo periodic inspections in accordance with the Special Equipment Safety Law. Inspections are governed by TSG Q7016-2016 (Supervision Inspection Rules for Installation, Retrofit and Major Overhaul of Lifting Appliances) and TSG Q7015-2016 (Periodic Inspection Rules for Lifting Appliances), with a periodic inspection interval of every two years. LD-type cranes with a lifting capacity below 3t or a lifting height below 2m are not subject to special equipment management.
Q: What is the lifting speed of the LD-type single-girder electric overhead crane? Can a two-speed option be selected?
A: The lifting speed of the LD-type crane depends on the electric hoist model. With a CD1 electric hoist, it provides single-speed hoisting at 8 m/min. If an MD1 electric hoist is selected, two-speed hoisting is available: 8 m/min in fast mode and 0.8 m/min in slow mode, with the slow speed suited for precision lifting applications that require precise positioning. The long-travel speed offers three options — 20 m/min (floor pendant), 30 m/min (remote control), and 45 m/min (remote control + operator's cab) — while the standard cross-travel speed is 20 m/min.
Q: Can an operator's cab be added to the LD-type crane? What operation modes are available?
A: The LD-type single-girder electric overhead crane supports three operation modes: floor pendant control (standard, with pendant cable length configured to match the lifting height), radio remote control (optional, with an operating range of generally ≥50m), and a combination of remote control plus operator's cab (optional, with the cab suspended below the main girder, suitable for applications requiring precise positioning or where the operator's line of sight is limited). Kelude Heavy Industry offers a three-in-one configuration solution to accommodate different on-site operating preferences.
Kelude Heavy Industry has years of experience in the bridge crane sector. The LD-type single-girder electric overhead crane product line covers the full 1–20t range and can be paired with CD1/MD1 electric hoists for a complete lifting solution. For a deeper dive into bridge crane technology, refer to the Bridge Crane Technical Encyclopedia. If the LD-type does not meet your specific operating condition requirements, check out the Non-Standard Customization Guide for tailored solutions. Choose Kelude Heavy Industry — from reliable products to professional service, we keep your material handling running smoothly.
