Precast buildings in developed countries and regions such as Europe, America, Japan and Singapore developed earlier and have now entered a mature stage.

2.

In the construction of precast buildings, personnel are usually required to assist the components in place after the components fall to a certain height, which puts forward higher safety requirements for the stability of anti swing, hovering start and slow positioning of the tower crane, Traditional tower crane is difficult to meet this point.

With the increasing penetration of tower crane leasing market, its market scale is also expanding.

Precast building refers to the building assembled on site with precast components produced by the factory.

At present, construction machinery leasing in developed countries accounts for 65% of the total market share.

The demand change of precast buildings for tower cranes.

1.

3 impact on tower crane leasing enterprises at present, there are a large number of competitive enterprises in China’s tower crane leasing industry, and the market concentration is still low..

Precast components produced in factory shall be transported to the project site and assembled by tower crane.

The tower crane with good performance can ensure the lifting quality and improve the lifting efficiency.

This has also led to a significant increase in the demand for 300 ~ 400tm large tower cranes in 2018.

Compared with the traditional cast-in-situ construction method, it has obvious advantages in operation efficiency, labor cost and environmental protection.

Now, China vigorously promotes precast buildings and fundamentally changes the requirements for tower cranes.

At present, precast concrete structure is the main form of precast buildings in China.

3) Higher safety requirements “no lifting when someone stands under the lifted object” is one of the “ten no lifting” in the traditional tower crane operation.

As the construction focus of precast buildings, component hoisting has many factors affecting quality, progress and safety in hoisting equipment selection, site layout, construction operation and technical management.

2) More precise control} the demand of traditional construction methods for tower crane is only “lifting”, while the demand of precast buildings for tower crane pays more attention to “loading”.

Specific performance in the following points.

Many precast construction projects are difficult to find one machine, and the rent of tower cranes has also increased significantly.

As we all know, China is the largest producer and consumer of construction machinery in the world, and the construction machinery leasing market is representative.

Precast buildings are an important carrier to promote building industrialization and a major change in traditional construction methods.

5) More requirements for tower group operation} in the construction of precast buildings, the construction site generally requires that each building be equipped with a tower crane, and the tower group operation is normal, which puts forward special requirements for the anti-collision and anti-interference of tower group operation, the independent height and suspension height of tower crane, and the flat head tower crane is more suitable for the tower group operation of assembled buildings.

In recent years, China’s precast building area has maintained a rapid growth.

1) The weight of precast components is much higher than that of traditional building components, which greatly improves the lifting capacity of tower crane.

According to the structural form, it can be divided into precast concrete structure, steel structure and wood structure.

The acceleration of the construction progress has a higher frequency of use of the tower crane, which means that in case of equipment failure, it will cause more obvious delay of construction period and increase of cost.

With the further optimization of tower crane structure, the space of its leasing market will be further released.

It is an inevitable development trend for tower cranes to be medium-sized, large-scale and high-end.

It is mostly used in commercial housing, public buildings, affordable housing, rural and tourism landscape projects.

Development of tower crane leasing market for general construction contracting, compared with self purchased equipment, equipment leasing has the following obvious advantages: first, reduce the use cost, reduce the one-time investment in fixed assets and increase capital liquidity; Second, improve the utilization rate of equipment, avoid idle equipment, and effectively solve the problem of incomplete models of self owned equipment; Third, improve construction efficiency and safety.

As the main hoisting equipment on the construction site, the product performance of tower crane has become an important factor affecting the on-site construction, which also promotes the change of tower crane demand.

Through the continuous adjustment and optimization of the component weight by the architectural design and construction unit, the current market demand for the lifting capacity of the tower crane for the hoisting of precast buildings is generally 200tm-350tm, and the tower crane of 160tm in some projects can also complete the hoisting operation.

Therefore, the stability of tower crane products The degree of easy maintenance and the professional quality of maintenance personnel put forward higher requirements.

In 2019, the penetration rate of domestic precast buildings was 18.4%.

According to statistics, in the past ten years, the scale of tower crane leasing market has increased from 34.2 billion to 110.8 billion.

Among them, the penetration rate of precast buildings in the United States, France and Singapore is as high as about 80%.

4) Higher product stability compared with the traditional cast-in-place method, the construction progress of 7 days and one floor is generally one floor, and the precast building can be completed in about 3 days.

In 2020, the newly started precast buildings in China totaled 630 million m2, an increase of 50% over 2019, accounting for about 20.5% of the new building area.

Taking the tower crane leasing market as an example, according to statistics, the penetration rate of the tower crane leasing market has increased from 45% to 75% in the past decade.

In order to improve competitiveness, enterprises specializing in leasing construction hoisting equipment often purchase new equipment in time according to market demand and equipment use, which is conducive to the application of new equipment and new technology and improve construction efficiency and safety; Fourth, enjoy more professional supporting services and reduce relevant expenses.

Flat Steel Anchor

Factory production and mechanized construction are important characteristics of precast buildings.

The accuracy of component installation requires the centimeter level control performance of the tower crane, stable lifting, sensitive braking and good slow positioning function.

In recent years, with the transformation of construction general contractor, the penetration rate of China’s construction machinery leasing industry is also rising.

The work goal of reaching more than 15% by 2020 set in the 13th five year plan action plan for precast buildings has been completed.