Construction Tower Crane

I. Product Image Description

(1) Construction Tower Crane Product Drawing

(Recommended to be paired with high-definition real-scene images or 3D renderings, clearly showcasing the following key elements: 1. The main structure of the tower crane (tower body, jib, counter-jib, and tower top), with annotations indicating the jib length and maximum working radius. 2. The hoisting mechanism (drum, wire rope, and hook assembly), demonstrating a visual representation of heavy-load lifting operations (e.g., reinforcing steel bars, formwork). 3. The slewing mechanism (the connection point between the tower body and the jib), highlighting its 360° slewing capability. 4. The luffing mechanism (the trolley on the jib), illustrating how the trolley moves to adjust the working radius during operations. 5. The operator's cab (located at the top of the tower body or at the base of the jib), marked with the control panel layout and the operator's field of view. 6. Safety devices (including load limiters, moment limiters, and height limiters), clearly labeled to indicate the positions of critical safety components. 7. A background depicting an architectural construction site environment (such as a high-rise building project or coordinated operations involving multiple tower cranes), emphasizing the practical engineering application context.)

II. Product Name

(1) Construction Tower Crane

1. QTZ Series Tower Cranes (40-80t·m, Medium and Small Size, Suitable for Multi-story Buildings and Factory Construction)
2. QTK Series Quick-Assembly Tower Crane (30–60 t·m, Rapid Disassembly and Assembly, Ideal for Temporary Construction Sites and Small-Scale Projects)
3. QTP Series Flat-Top Tower Cranes (80–200 t·m, Topless Design, Ideal for Multi-Tower Operations and Confined Construction Sites)
4. QTC Series Slewing Tower Cranes (150–500 t·m, with Flexible Jib Extension, Ideal for Super-Tall Buildings and Heavy Component Lifting)
5. Customized Special Tower Crane (with adjustable boom length and torque to meet specific needs, designed for irregular construction sites and handling special heavy loads such as steel structures).

 

III. Product Introduction

(1) Construction Tower Crane

The construction tower crane is a core piece of high-altitude lifting equipment in the field of building construction. By means of the slewing, luffing of the jib, and the vertical movement of the hook, it enables precise transportation of heavy loads within a 360° range, at varying heights and radii. Compared with other lifting equipment, this type of crane boasts three key advantages: "large working radius, high lifting height, and substantial rated torque." Its working radius can reach 30–80 meters, with a maximum lifting height exceeding 400 meters, and its rated torque ranges from 30 to 500 t·m. These capabilities make it well-suited for multi-story, high-rise, and even ultra-high-rise construction projects, effectively addressing the challenges associated with lifting "heavy components across large spans at great heights."

This product series is centered around the core features of "efficient lifting, stable reliability, and safe, controllable operation." It adopts a modular design for convenient disassembly and assembly—specifically, the QTK series quick-assembly models can be fully assembled within just 1–2 days. Equipped with multiple torque and weight-limiting devices, it effectively eliminates risks of overloading and instability. Additionally, select models support intelligent monitoring and remote dispatch capabilities, making them ideal for coordinated operations among multiple tower cranes. This makes them an indispensable key piece of equipment for both "vertical transportation and horizontal lifting" in construction projects.

IV. Product Details

(1) Construction Tower Crane Details

1.

Core Parameters

 

Product Model	Rated Torque	Lifting arm length	Maximum Working Radius	Maximum Lifting Capacity	Lifting height (free-standing / attached)	Lifting speed	Rotational speed	Amplitude variation speed	Work Level
QTZ40 Tower Crane	40 metric tons·m	40 meters	40 meters	4T	28 meters / 120 meters	0.8–8 m/min	0.5 r/min	15 m/min	A3
QTK60 Quick-Assembly Tower Crane	60 t·m	45 minutes	45 minutes	6T	30m/100m	1-10 m/min	0.6 rpm	18 m/min	A3
QTP125 Flat-head Tower Crane	125 t·m	55 meters	55 meters	12.5 tons	40m / 200m	0.5–12 m/min	0.4 r/min	20 m/min	A4
QTC250 Slewing Jib Tower Crane	250 metric-ton meters	60m (boom)	60 meters	25t	50 meters / 300 meters	0.3-8 m/min	0.3 rpm	12 m/min	A5
Customized Special-Purpose Tower Crane	50-500 metric-ton meters	30-80 meters	30-80 meters	5-50 tons	30-400 meters	Optimize on demand	Optimize on demand	Optimize on demand	A3-A6

2.

Core Configuration and Features

• Main Structure: The tower body is constructed using Q345B seamless steel pipes or angle steel trusses, with high-strength bolted connections between sections (tensile strength ≥ Grade 8.8). The lifting arm adopts either a truss structure (for QTZ/QTK series) or a box-type structure (for QTC series), offering lightweight design and high rigidity, with maximum deflection ≤ L/1000 (where L represents the arm length). The counter-jib is equipped with counterweights to ensure rotational balance, thereby reducing stress on the tower body.
• Drive System: The lifting mechanism features a dual-speed or multi-speed motor paired with a hardened gear reducer. The drum is made of cast steel with a wear-resistant surface treatment, while the wire rope used is a 6×37+FC high-strength hoisting cable (with a breaking strength ≥ 5 times the rated load). The slewing mechanism incorporates a planetary gearbox and slewing bearing, enabling continuous 360° rotation with positioning accuracy maintained within ±1°. Additionally, the luffing mechanism (for trolley luffing) is driven by a variable-frequency motor, ensuring smooth trolley movement and precise adjustment of the working radius.
• Safety Protection Features: Standard equipment includes a load limiter (automatically cuts off lifting power when overloaded by 10%), a torque limiter (automatically alarms and cuts off power to hazardous movements when torque exceeds 10% of the rated capacity), a height limiter (stops the hoist from rising or lowering when reaching its limit position), and a slewing limiter (prevents excessive slewing angles to avoid cable entanglement). Additionally, a buffer is installed at the base of the tower section, a hook anti-disengagement device is fitted at the end of the jib, and the cab is equipped with an emergency power-off button.
• Smart Features: Optional intelligent monitoring system (equipped with sensors for weight, torque, height, and wind speed), providing real-time display of operational parameters. Supports remote data transmission, enabling management personnel to monitor equipment status and receive fault alerts via mobile devices. Tower crane models designed for group operations are equipped with anti-collision systems, automatically issuing warnings when multiple cranes operate in close proximity to prevent potential collisions.

 

(III) Applicable Scenarios

1.

Applicable Scenarios for Construction Tower Cranes

• Multi-story and mid-rise construction: The QTZ and QTK series are designed for residential and industrial building projects ranging from 6 to 18 stories, efficiently lifting materials such as reinforcing steel, formwork, and concrete placing machines. Their operational radius ensures comprehensive coverage across the entire construction site.
• High-rise and Supertall Construction: The QTP and QTC series are designed for office buildings, hotels, and landmark structures exceeding 20 stories. They are used to lift steel structural components, curtain wall materials, and large-scale equipment, with lifting heights synchronized to match the building's increasing height.
• Large-scale Industrial Projects: Customized Special Tower Cranes for Power Plants, Cement Factories, Shipbuilding Yards, and Other Projects. These cranes are designed to lift heavy equipment such as boilers and tower sections, as well as prefabricated components, making them ideal for handling substantial loads and adapting to complex, irregular site requirements.
• Collaborative Operation of Multiple Towers: The QTP flat-top tower crane (without a jib) is designed for use in confined construction sites where multiple cranes operate simultaneously, such as projects located in urban core areas. It effectively prevents collisions between cranes and significantly enhances construction efficiency.

(IV) After-sales Service

1.

Preliminary Services

• Provide free on-site surveys (including site dimensions, geological conditions, and surrounding environment), and recommend tower crane/lift models based on construction requirements (such as building height and material handling needs). Additionally, prepare equipment layout drawings, foundation construction plans, and assembly/disassembly schemes to assist customers in completing the necessary approvals and filings.
• For customized requirements (such as ultra-high-rise applications or specialized materials), the technical team will design exclusive solutions, conduct moment verification and structural strength analysis to ensure equipment compatibility.

2.

Installation and Acceptance

• Installation services will be provided by a team certified with "Crane Machinery Installation Qualification." The tower crane installation includes foundation pouring, tower body assembly, jib erection, and safety device debugging. Meanwhile, the elevator installation covers rail frame assembly, wall-attached frame fixing, and cage debugging.
• After installation, conduct no-load trial operation and load testing (including a tower crane test at 1.25 times the rated torque and a hoist test at 1.25 times the rated load capacity). Invite the customer and the local special equipment inspection agency for acceptance inspection. Upon successful completion, issue the usage registration certificate.

3.

Warranty and Operations

• 1-year warranty for the entire machine (with a 2-year warranty on core components such as tower crane slewing bearings and elevator safety gear), including free repair and replacement of faulty parts during the warranty period. Regular inspections will be provided—monthly for tower cranes and bi-weekly for elevators—focusing on critical areas like safety devices, transmission systems, and structural connections.
• Establish equipment maintenance records, documenting each maintenance and inspection activity. During peak construction periods, increase the deployment of on-site technical personnel to ensure continuous equipment operation.

4.

Training and Support

• Provide free training (theoretical + practical) for operators and safety personnel, covering equipment operation procedures, safety precautions, and emergency troubleshooting. Upon successful assessment, an operation certificate will be awarded.
• A 24-hour after-sales hotline is available, ensuring prompt responses to equipment malfunctions (such as tower crane moment alarms or elevator safety device activations): on-site service within 2 hours in urban areas, 4 hours in suburban regions, and 8 hours at remote construction sites, guaranteeing uninterrupted construction operations.

The product system covers high-speed elevators, small machine room elevators, non machine room elevators, passenger elevators, sightseeing elevators, villa elevators, cargo elevators, utility elevators, car elevators, and escalators/escalators. The product has been widely used in large shopping malls, commercial buildings, high-end hotels and other places.