LDP-Type Offset Single-Girder Crane; LDP-Type Electric Single-Girder Crane
I. Product Overview
The LDP-type offset single-girder crane is designed and manufactured in accordance with the national standard JB/T1306-94 and serves as an upgraded replacement for the LD-type electric single-girder crane. The entire machine features a box-type offset-track main girder, with the electric hoist traveling along the upper edge of the main girder. Compared to conventional single-girder cranes, this design saves approximately 1 meter of floor space—allowing it to be installed even in workshops with lower ceiling heights.
With a lifting capacity ranging from 1 metric ton to 20 metric tons across 9 models and spans from 7.5 to 35.5 meters, these cranes are particularly well-suited for applications where overhead space in the factory is limited but sufficient lifting height is required.
Product Images
II. Specifications and Models
The LDP-type electric single-girder crane is available in lifting capacities of 1 metric ton, 2 metric tons, 3 metric tons, 5 metric tons, 8 metric tons, 10 metric tons, 15 metric tons, 16 metric tons, and 20 metric tons, with spans ranging from 7.5 to 35.5 meters. The hoisting mechanism is equipped with a CD1 single-speed electric hoist or an MD1 dual-speed electric hoist.
III. Operating Procedures
The LDP-type electric single-girder crane is available in two operating modes: ground control and air control:
- Ground Operations: Wired Joystick Control, Wireless Remote Control
- Cab Operation: Open or closed; entry direction options include side-opening or end-opening
IV. Technical Features
Three-in-One Drive System:Variable-frequency functions such as ultra-low speed, single-speed, and dual-speed operation can be added to ensure exceptionally smooth running, lifting, and motor operation.
Multi-Function Protection:Equipped with overload alarms, protection against skewed or tilted lifting, secondary protection against hook impact, and phase loss and overcurrent protection. The control panel (joystick) operates on a 12V safety voltage.
Off-track design:The trolley runs along the upper edge of the main girder; with its wide wheelbase, it operates smoothly, eliminating the swaying that occurs when the hoist starts or stops on a traditional LD single-girder crane.
V. Components
▎Box-type off-track main girder
The main girder features a box-section, off-center track design, with the hoist trolley suspended from its upper edge. Compared to traditional center-suspension structures, the main girder has a lower center of gravity and better lateral stiffness, resulting in significantly reduced sway during operation. The offset track design also provides greater effective hoist height for the hoist—for the same workshop ceiling height, the LDP can lift loads higher than the LD.
▎CD1/MD1 Electric Hoist
The hoisting mechanism comes standard with a CD1 single-speed hoist or an MD1 dual-speed hoist. The dual-speed model allows for slow, precise lowering of the hook when positioning heavy loads, making it suitable for precision operations such as mold installation and equipment alignment. The hoist trolley features a wider wheelbase, resulting in significantly less sway during starts and stops compared to standard single-girder cranes.
▎Electrical Control System
The control circuit operates on a 12V safety voltage, ensuring that the control handle or remote control will not cause an electric shock even if water enters or if they are damaged. The electrical control box is equipped with four sensors: phase loss protection, overcurrent protection, and an overload limiter. An optional variable-frequency drive is available to enable fully stepless speed control throughout the lifting and travel processes.
VI. Scope of Application
The LDP-type offset single-girder crane is widely used in general-purpose applications such as factory workshops, warehouses, and logistics transfer stations. Its offset track design gives it an advantage over the standard LD-type crane in scenarios where overhead space in the facility is limited.
Environmental Requirements:Ambient temperature: -25°C to +40°C; no flammable, explosive, or corrosive gases. Do not use in hazardous environments involving flammable or explosive substances, corrosive substances (acids, alkalis, plating solutions, or steam), electromagnetic interference, electric shocks, high-temperature solutions, overloads, or dust.
Structural Diagram
Technical Specifications
The following is a comparison table of the main technical specifications for the LDP-type offset single-girder crane:
| Lifting Capacity Lifting Capacity | 1, 2, 3, 5, 8, 10, 15, 16, 20 t | |||
| Span Span (m) | 7.5 ~ 35.5 | |||
| Lifting Height Lifting height (m) | 6 / 9 / 12 / 18 / 24 / 30 | |||
| Hoisting Mechanism Hoist |
Type: Model | CD1 Single-Speed / MD1 Dual-Speed Electric Hoist | ||
| Lifting speed (m/min) | 0.5–5 metric tons | 8 (single-speed) / 0.8–8 (two-speed) | ||
| 10–20 metric tons | 7 (single-speed) / 0.7–7 (two-speed) | |||
| Lifting Height (m) | 6;9;12;18;24;30 | |||
| Operating Mechanism Travel mechanism |
Travel Speed (m/min) | 20 | ||
| Electric Motor | ZDY Series Conical Rotor Brake Motor | |||
| How to Use Operation | 地操（手柄/遥控）/ 空操（驾驶室） | |||
| Job Level Work system | A3 ~ A5 中级 Fc=25% | |||
| 小车形式 Trolley type | 偏轨小车，加宽轮距 | |||
| Power Supply Power supply | 三相交流 Three-phase AC 380V 50Hz | |||
| 工作温度 Working temp (°C) | -25 ~ +40 | |||
| 适用轨道 Rail type | 工字钢 I-steel | |||
| 适用标准 Standards | JB/T 1306-94 / GB/T 3811 | |||
八、优缺点
✅ 优点：克服了LD型电动单梁起重机稳定性差、有效起升高度小的缺点，比LD型节省约1米的空间占用，经济实惠。
⚠️ 缺点：工作级别较低（A3~A5），不适用于繁重车间的连续高负荷作业。频繁起吊的工况建议选工作级别更高的双梁起重机。
九、适用场景与客户案例
▎老旧厂房改造——空间不够的救星
有个河北的机械加工厂，厂房层高不到8米，原来用的是一台老式LD型5吨天车，起升高度只有4.5米，吊起工件后下面走人的空间都没有了。换了LDP偏挂型之后，同样车间高度起升做到了6米，下面是通道上面吊工件，空间利用率一下提上来了。改造完成后车间布局重新整理，整体物流效率大概提升了15%~20%。
▎仓库中转——大跨度、多规格
河南本地一家钢材市场，需要在10~20米跨度的六个库区间分别配天车。选了LDP型5吨和10吨两个规格共5台，跨度从15米到30米不等。LDP的偏轨设计和箱型主梁让他们在库房不用额外加支撑立柱，节约了大概30%的土建费用。
▎食品/轻工行业——轻载高频但空间受限
一家食品添加剂厂，厂房建成后才发现顶部管线占用了大量空间，普通单梁天车装上去后起升高度不够。用LDP偏挂型3吨的配置，葫芦上缘运行让起升高度从4米提升到了6.5米，正好满足包装线吊运原料的需求。
十、为什么选克鲁德重工
LDP型偏挂单梁不是标准件，跨度、起升高度、葫芦配置都需要按工况匹配。选对厂家跟选对型号一样重要。
- 参数不虚标：我们给每台LDP配出厂测试记录——起吊额定载荷1.25倍测试，记录葫芦挠度、小车偏摆、电气绝缘值三个核心数据。说多少就是多少，不压价虚报参数。
- 非标不加价：非标跨度（7.5~35.5米之间任意尺寸）、特殊起升高度、加装变频功能，常规改造不加收设计费。你给一个参数表，我们出方案。
- 厂家直供，省一道：克鲁德是生产厂家，不是贸易商。LDP主梁自己焊接、自己喷砂、自己做跑车试验。省掉的中间商差价就是你的预算空间。
直接联系我们，把车间尺寸和吊重要求发过来，方案确认前不收任何费用。
十一、售后服务
LDP型偏挂单梁起重机自售出之日起，在一年内正常使用状态下因出现的质量问题免费保修。超出保修期的产品，我们负责维修，只收取配件成本费。
💰 价格参考：3吨×10.5米LDP偏挂型约2~3.5万，具体看葫芦配置（单速/双速）和操作方式（手柄/遥控）。配双速葫芦+遥控器的方案大约加3~5千，比同规格LD型贵不了多少，但起升空间多出1米。
📦 交货周期：5吨以下常用规格备有主梁钢材和葫芦，确认参数后7~10天发货。特殊跨度或加装变频器的，约12~15天。
💡 选购提醒：买偏挂型的都是因为空间不够——选跨度时别只看吊点跨度，还要算上葫芦在轨道上的运行长度，避免装了后发现葫芦跑不到最边上。把厂房图纸发给我们，10分钟帮你看尺寸合不合适。
📞 联系报价：起重量+跨度+起升高度三个数发过来，10分钟出方案和报价。电话：13903802779
Summary Table of Specifications
Frequently Asked Questions
问：LDP型偏挂单梁和普通LD型有什么区别？
答：结构上LDP采用偏轨形式，葫芦在主梁上缘运行，LD型葫芦挂在主梁下方。区别最直观的体现是起升空间——同样车间高度，LDP比LD多出约1米的有效起升高度。运行稳定性方面，LDP的小车轮距更大，起停摆动小得多。价格方面LDP比同规格LD型大约贵10%~15%，但省下的厂房加高费用远不止这个数。
问：LDP型的最大跨度能做到多少？
答：标准产品最大跨度为35.5米。如果厂房跨度超过35.5米，可以非标定制，但起重量建议别超过10吨——大跨度+大吨位时偏轨结构的刚性不如双梁，更推荐用双梁桥式方案。设计制造按JB/T 1306和GB/T 3811标准执行。
问：LDP多少钱？怎么报价？
答：以3吨×10.5米、CD1葫芦+手柄操作的方案来说，约2~3.5万。8吨×22米带遥控的版本约5~8万。报准确价格需要三个参数：起重量（吨）、跨度（米）、起升高度（米），以及要不要加变频或驾驶室。发给我们，10分钟出方案和报价。电话：13903802779
