LDA Electric Single-Girder Overhead Crane, LDA Shipboard Crane, LD Ceiling-Mounted Crane

I. Product Overview

The LDA-type electric single-girder crane is commonly referred to in the market as an “overhead crane,” “gantry crane,” or “ceiling crane”—all of which actually refer to the same piece of equipment. Designed for use with CD1/MD1-type electric hoists, it has a lifting capacity of 1–20 metric tons and a span of 7–40 meters, making it a lightweight, compact single-girder lifting device. Whether you arrived here by searching for “overhead crane,” “ship crane,” or “ceiling crane,” this page is all about this machine. This article walks you through the specifications, parameters, and key purchasing considerations—so by the end, you’ll know exactly which model to buy.

Product Images

II. Specifications and Models

• Model:LDA Type
• Specifications:1 metric ton, 2 metric tons, 3 metric tons, 5 metric tons, 10 metric tons, 16 metric tons, 20 metric tons; custom sizes available

III. Technical Specifications

• Span:19.5 meters, 20.5 meters, 21.5 meters, 22.5 meters, 25.5 meters, 30.5 meters; custom lengths from 7 to 40 meters are available.
• Lifting Height:6 meters, 9 meters, 12 meters, 18 meters, 24 meters, 30 meters; custom sizes are available.
• Job Level:A3/M3
• Lifting speed:8 m/min (slow speed: 0.8 m/min), 7 m/min (slow speed: 0.7 m/min), 13.5 m/min (slow speed: 0.35 m/min), optional
• Trolley operating speed:20 m/min; can reach 30 m/min at high speed
• Operating speed of large vehicles:20 m/min; can reach 30 m/min at high speed
• Power Supply:Three-phase AC 380 V, 50 Hz (can be customized to the voltage of the export destination)

Structural Diagram

IV. Components

The LDA-type electric single-girder overhead crane consists primarily of three parts: the bridge (metal structure), the electric hoist, and the electrical system.

▎Cable Trays
The main girder consists of I-beams and steel plates welded together to form a box-shaped structure; the end girders are made of section steel or steel plates that have been press-bent into shape, and the main and end girders are connected using high-strength bolts. The bridge frame serves as the skeleton of the entire machine and bears its entire weight. The LDA-type bridge girder features a simple structure and light dead weight, making it suitable for use in standard workshops with spans ranging from 7.5 to 35 meters.

▎Electric Hoist
Compatible with CD1 or MD1 type wire rope electric hoists, with a hoisting speed of 8/0.8 m/min (two-speed) and a travel speed of 20/30 m/min. The hoist travels along the lower flange of the main girder’s I-beam. The CD1 is single-speed (normal speed), while the MD1 is dual-speed (normal speed + slow speed); the MD1 is recommended for lifting precision equipment.

▎Electrical System
It uses a 380V three-phase power supply with a control voltage of 36V (safe voltage). Operation modes include ground operation (using a handheld controller) and remote control. Ground operation is cost-effective, while remote control offers flexibility and convenience. The distribution panel is equipped with master stop and master start buttons, as well as a one-button power cutoff for emergencies.

V. Purchase Information

When purchasing a single-girder crane, please provide the following information so that we can confirm your requirements more quickly:

• Lifting Capacity
• Span (center of track to center of guide rail)
• Lifting Height (Hook Center to Ground)
• Do you need to order guide rails and cables? (Please provide the crane travel length.)
• If you have any additional details, please let us know, and we will provide you with a competitive price for the single-girder crane.

VI. After-Sales Service

The LDA-type electric single-girder overhead crane is covered by a one-year warranty from the date of purchase for any quality issues that arise under normal use. For products beyond the warranty period (except for those that cannot be repaired), our company will provide repair services and charge a fee to cover the cost of replacement parts.

Price Guide (to give you a rough idea):Prices for LDA-type electric single-girder overhead cranes are calculated based on lifting capacity and span. A 5-metric-ton crane with a 12-meter span costs approximately 20,000–35,000; other manufacturers’ models of the same specifications cost approximately 25,000–40,000. Krude offers direct factory supply, so even a single unit is priced at wholesale rates. Optional features are charged separately, and price differences are transparent.

Product Availability and Delivery Times:Standard models ranging from 1 to 10 metric tons and 7 to 22.5 meters are in stock; shipment will be arranged within 7 to 10 days after parameters are confirmed. Custom-made models will be shipped within 15 to 20 days. Each unit undergoes a load test before leaving the factory and comes with a certificate of conformity and a test report.

Summary Table of Specifications

VII. Why Choose Krude Heavy Industry

行吊选购指南——5个关键参数怎么定

买行吊（航吊/天吊）不像买个水泵，参数选错了后面改不了。这5个参数你下单前必须想清楚：

1️⃣ 起重量——宁大勿小
行吊的起重量不是按你”最大吊多重”来选，而是按”最重那件货加20%余量”来选。比如你现场最重的工件是4吨，选5吨规格，不要选3吨。原因很简单：行吊超载用久了，主梁会下挠变形，到时候换主梁比当初多花一倍的钱。LDA型常规有1吨、2吨、3吨、5吨、10吨、16吨、20吨七个档位，跨度越大对应的最大起重量越小。

2️⃣ 跨度——宁短勿长
跨度是指两条轨道中心线的距离，不是厂房宽度。很多客户犯的错是”厂房30米宽就买30米跨”——不对。行吊的跨度要比厂房宽度短2~3米，因为两边要留出轨道安装空间和安全距离。而且跨度越大，主梁自重重、有效起升高度被压缩得越多。16吨以上的大吨位，跨度超过25米建议咨询厂家做结构校核。

3️⃣ 起升高度——留余量
起升高度是钩子能升到的最高点到地面的距离。高度不够最尴尬——设备吊起来了但离地面只有一米，没法装车。LDA型常规6米、9米、12米、18米、24米、30米可选。如果厂房轨道高度是8米，选9米档，留出吊钩和葫芦的最小空间（约1.5米）。

4️⃣ 电动葫芦——单速还是双速
CD1型是单速（8m/min），MD1型是双速（8m/min快速+0.8m/min慢速）。日常吊装选CD1够用，但如果你需要精准对位安装（比如模具装配、设备安装），建议加几百块升级MD1双速。慢速档接近工件时慢慢放，不会撞坏东西。

5️⃣ 轨道和供电
行吊不是买了就能用的——还需要配运行轨道（工字钢）和供电系统（滑触线或电缆卷筒）。LDA型的轨道通常用I20a~I45c的工字钢，具体规格取决于起重量。供电方面，滑触线比电缆卷筒贵但耐用，适合频繁使用；电缆卷筒便宜，适合偶尔用用。下单时这两个配件最好一并问清楚，免得货到了发现装不上。

选行吊没有标准答案，关键看你的实际工况。如果你不确定，把厂房尺寸和吊装需求发过来，我们帮你判断。不敢说能省多少钱，至少帮你避坑。

Frequently Asked Questions

问：行吊和天吊是一回事吗？为什么叫法这么多？
答：同一个东西。行吊、天吊、航吊、行车、天车都是指电动单梁起重机，只是不同地区叫法不一样——北方厂子叫”天车”多，南方工地叫”行吊”多，航吊是港口那边的称呼。不管叫什么，技术标准都按GB/T 3811和JB/T 2603来。你搜”行吊”还是搜”天吊”找到的都是同一类设备。

问：LDA型行吊和以前的老款LD型行吊有什么区别？我买的配件通用吗？
答：LDA是老款LD的升级版本，主要改了端梁结构和驱动装置，运行更平稳、噪音更小。大部分配件（电动葫芦、行走轮、电缆滑车、遥控器）可以互换，但主梁和端梁不通用。如果纯粹是换葫芦，老LD型可以配新葫芦；如果要换整机，建议直接升级到LDA型。

问：买行吊要准备什么资料才能拿到准确报价？
答：三个数字就够了——起重量（吨）、跨度（米）、起升高度（米）。再详细点的：现场电源电压、有没有行车轨道（没有的话需要导轨报价）、操作方式（遥控还是地操）。你把这三四个数字发过来，10分钟内给你初步报价。不需要发图纸。