DAHA Tower Crane QTZ80

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Dahan group, established in 2000, is specialized in Tower Crane Hoist and Building Hoist. And registered capital reaches 100 million RMB. Dahan group has their own research and development department as well as production, marketing, service and financial department. The production capacity can be over 10000 sets and have earned the reputation as a leading manufacturer of tower crane and construction hoist.

Located in Jinan high and new technology industrial zone, office area is 3000square meters. Production base is in Jinan, Guangdong, Hunan. Total area  reaches 300000 square meters.

High-quality technological management team and first-rate production and detection equipment lay good foundation for the steady development of the company. Its technology and management personnel, including many senior engineers, have college degree or above, and skilled workers mostly have vocational school degree or above. The company also has over 200 general and special production equipment and over 300 measuring instruments for detection. The company passed the certification of ISO9001 Quality Management System in 2002, providing reliable guarantee for the management system and product quality.  

Our Dahan concern requirements of modern city construction and strive to provide products with advanced technology and rational price, furnish good technical support and pre and after-sales service for customers. We hope to create beautiful future with customers.

Corporate Vision

Vision:Become an ever-green construction machinery enterprise and maximally meet customers’ requirements
Core Values  
Quality: High quality, innovation, safety and reliability.
              High quality is the basis of the enterprise.
              Innovation is the soul of the enterprise.
              Safety is reverence to life.
              Reliability wins the trust.
Service: Customer focused, customers are existence value of Dahan people, do what we have promised.
Responsibility: Attentive and responsible, brave to undertake and fully perform individual, company and social responsibility.
Spirit
Hard Work:Industry, simplicity, perseverance and hardships are the source power of Dahan to achieve transnormal and leapfrog development.
Struggle:Concentrated reflection of brave advance, assiduous seeking, brave challenge and enthusiasm and progress of Dahan people.
Pioneering & Progress::Promote traditions, keep pace with the times, have the courage to innovate and pursue excellence in work

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Q:More than meters of tower cranes must be equipped with red barrier lights at the top
To see the land of tower crane or floating crane... Basically, however, tower cranes over 30 meters above the tower shall be equipped with red light on the top of the tower and jib.
Q:Tower crane and construction hoist service life? What are the norms and standards? How to detect?
The tower crane service, QTZ40 state (including 40) the following ten years, more than QTZ63, the age of fifteen years, the construction elevator used for ten years; but specific to various provinces and cities are different, such as Jiangsu Province, the 40 tower crane can be used 8-10 years, QTZ63 tower crane used for 15 years, 8 years of construction hoist. Of course, we should not blindly look at the provisions, tower cranes and the use of strength sometimes determines the life of it!
Q:What is the rental price of a tower crane? General site rental more, but also buy more? Ask the industry for an answer?
The rental price of tower crane consists of the cost of advance and retreat yard and the monthly rent of tower crane. The cost of the advance and retreat yard includes the loading and unloading costs, transportation costs, installation costs and monitoring expenses of the tower crane. The rent of the tower crane includes the cost of tower cranes, the cost of tower crane maintenance and the wages of the crane drivers. At present, many sites are using lease way to use tower cranes, so that the occupation of the site will be less rent, investment will be relatively small.
Q:Is the tower crane a special type of work?
it belongs to the high-altitude workers, not the special workers, what is the tower crane talent network is a platform for the exchange of tower.
Q:What are the parts of a tower crane? What are their main functions?
The structural elements include the followingMain arm: carrying weight, and making the trolley have walking track.Balance arm: put up lifting mechanism, electric box, counterweight, and make tower crane to achieve balance torque, reduce the standard section of the bending moment.Tower cap: connect the main arm with the balance arm by the tie bar, so as to reduce the bending moment of the standard section.
Q:What is the torque limiter of the tower crane A: the lift is stopped when the lifting torque is exceeded. B: over gravity
The torque limiter acts as follows: (a)In lifting process, when the weight of the lifting object moves ahead of the trolley when the lever force exceeds the moment limiter, the hook rises, the motor and the trolley forward motor are stopped at the same time, and the utility model has the safety function.
Q:What parameters are lifting machines called large equipment? 200
General purpose gantry cranes: MG, 440t, MG, 360t, MG, 450t, Me, 360t, ME, 900tGeneral purpose bridge crane: QD, 350t, QD, 400t, QD, 450t, QD, 390t, QD, 330t, QE, 350t, QE, 330tThe above tonnage is now recognized as a large lifting machinery.Hoisting machinery refers to the lifting of heavy objects with hooks or other lifting devices, and mechanical operations such as lifting and moving in space. There are many classifications of cranes, such as cranes, cranes, cranes, cars and so on. They are commonly referred to as one or more kinds of cranes.
Q:How many meters of cranes should be in accordance with the anemometer?
In accordance with national regulations, outdoor cranes need to install anemometer.Specific provisions"GB6067.1-2010 crane safety regulations", 9.6.1 anemometer and wind speed alarm9.6.1.1 high speed cranes for outdoor work shall be equipped with an anemometer. The anemometer shall be located upwind of the upper part of the crane.9.6.1.2 high speed crane for outdoor operation should be equipped with an air speed alarm that displays instantaneous wind speed, and when the wind speed is greater than the working wind speed setting value, the alarm signal should be sent out.
Q:Tower crane technical condition GB/T 9462-1999 has been cancelled? If so, what is the new standard?
This standard applies to tower cranes defined in GB/T 6974.3.This standard does not apply to mobile cranes equipped with tower cranes. This standard compares with the 5 standards such as GB/T 9462-1999, the main change is as follows:- redefining the type identification principle of tower cranes and eliminating the parameter series in JG/T 5037-1993;
Q:Are there any special requirements for the installation of wall fittings of tower cranes?
The angle of the two member of the wall shall not be less than 60 degrees and shall not exceed 90 degrees;

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