What are the advantages of the flower stand gantry crane in the hoisting of prefabricated components?
Lightweight structure saves money and labor
The gantry crane for erecting flower stands is a hollow frame shape welded by angle steel or I-beam steel . The gantry crane legs and the main beam are riveted and welded together . Compared with ordinary box-beam gantry cranes, the weight of the whole machine is reduced by 30% to 50%. This feature has significant advantages in the transportation stage. For cross-regional construction projects, the transportation costs are greatly reduced, and at the same time, there is no need to rely on large cranes to assist assembly. The on-site installation cycle is greatly shortened.
There is a bridge prefabrication site project that is a typical example. It originally took 7 days for the equipment to arrive at the site. After switching to a gantry crane, the equipment was completed in only 3 days. The labor cost and machinery shift cost were directly reduced by about 20%. The economic benefits brought by the advancement of the construction period cannot be underestimated.
Strong wind resistance reduces downtime
When carrying out construction activities in coastal areas or windy areas, the gantry crane will be extremely afraid of riveting and welding at the connection between the gantry crane's legs and the main beam when encountering strong winds, and is extremely worried. The flower stand gantry crane has such a hollow structure, and its wind-facing area is relatively small. Coupled with the design of the triangular truss, under such construction, the wind resistance level can reach level 8 or above. The strength of this structure has been verified through wind tunnel testing. It can withstand the impact of instantaneous wind pressure and will not deform or change its posture. Compared with all-inclusive gantry cranes, the stability is much higher and much better.
According to statistical data from a certain port project, after using the flower stand gantry crane, the length of downtime due to wind was reduced from 15 days to 3 days per year, and the construction period was compressed by 80%. This phenomenon means that the construction unit can do more than ten days of work this year, making the project progress more secure.
Flexible and adjustable span lifting capacity
The optimized design of the flower stand gantry crane has a main beam and outriggers with a single span of more than 60 meters, which can fully meet the lifting needs of large prefabricated components. In terms of lifting capacity, what are the advantages of the flower stand gantry crane in the hoisting of prefabricated components? It provides multiple grades from 5 tons to 500 tons, covering from light components to heavy structural components, and there is a wide choice space.
The construction unit can choose appropriate specifications and sizes based on the actual conditions of the precast site. There is no need to purchase oversized equipment due to extreme conditions. Reasonable selection can not only avoid wastage of capacity, but also ensure that the hoisting operation is reliable and stable in terms of safety, which is helpful for cost control.
Track movement saves site space
There is a track wheel system arranged at the bottom. This system supports two-way linear movement in different directions. In this case, there is no need to reserve the radius required for the equipment to turn. The space utilization rate of the site can be about 40% higher than that of fixed equipment. There are gantry cranes that can be arranged along the prefabricated component production line, which can realize the integrated operation process of hoisting, transfer and storage.
Application data on a certain steel structure factory building project shows that the turnover efficiency of rail-type flower rack gantry lifting components has been increased by 35%, and secondary handling costs have been reduced. After the space in the site is released, more prefabricated components can be stacked, and the overall operating efficiency is significantly improved.
Easy maintenance reduces long-term costs
With the hollow structure, maintenance personnel can observe and operate each component in a relaxed state. Key components are exposed and there is no need to remove the protective cover during routine maintenance. Steel has better corrosion resistance than box-type structures. After being put into use for a long time, maintenance costs can be reduced by 25% to 30%.
This makes it easier and more efficient to perform maintenance on time. Maintenance personnel can quickly identify the problem and start to deal with it, thus reducing the time the equipment is out of service waiting for maintenance. During the entire life cycle of the equipment, the hidden costs are effectively controlled, and the return on capital investment becomes more worthy of expectation.
Safety monitoring ensures operation
Microelectronics technology, information sensing technology, and instant messaging technology are integrated into the gantry crane safety monitoring system. This system can monitor equipment operating data and operating behaviors in real time. Abnormal conditions will be warned in time, and abnormal operations will also be warned in time. In this way, safety hazards can be reduced and safety management levels can be improved.
In a Shandong project , the connection between the gantry crane legs and the main beam was riveted and welded , and a 1,500-ton gantry crane safety monitoring system was installed, which was equipped with wind speed sensors, infrared switches, electric control cabinets, sound and light alarms and other equipment to achieve all-weather safety protection. As for this system, once an accident occurs, it can also trace the cause, which is very valuable for safety management.
Which gantry crane is used for your prefabricated site? What is your experience with the flower rack structure and box structure? You are welcome to share your experience and opinions in the comment area.
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