During the transportation of a flatbed semi trailer, a broken beam is a more serious fault, which not only affects the transportation efficiency, but also may bring safety hazards. The following is a summary of the common reasons for the broken beam of a flatbed semi trailer. See if you have been hit?
Reasons for broken beams
1. Manufacturer reasons
1. The flatbed semi trailer beam uses inferior steel
The very direct and easy to understand reason is that the beam steel used by the trailer factory is of poor quality and cannot bear the designed load, causing the beam to break.
2. Reduce the beam specifications
The second is that the trailer factory cuts corners to save costs. The main thing is to reduce the specifications of the beam. The original 14 thick vertical plates were reduced to 10 thick, but the user did not know and still pulled the goods according to the 14 thick load capacity. The beam was overloaded for a long time, and it was reasonable to break.
3. Connecting the web of the beam
In addition to reducing the specifications of the beam, some unscrupulous trailer manufacturers save costs by connecting the web of the beam with two shorter steel bars. The load-bearing capacity is definitely much worse than that of a whole beam. It can be said that the beam is “broken” as soon as it leaves the factory. Users should pay attention to inspection when purchasing the vehicle.
4. Poor welding
In addition to the broken web of the beam, the lower wing plate also cracks. There are two main reasons for this. One is the technical problem of the welder, and the other is the unstable voltage during welding, which does not weld well.
5. Unscrupulous salesmen cheat
In fact, there is one more thing that must be paid attention to for the reasons mentioned above by so many manufacturers-preventing the cheating of some bad salesmen. Some salesmen want to make more money, and some others want to grab orders. The price is too low. The original flatbed semi trailer does not make money or even loses money, so they tamper with the configuration of the trailer.
First, the configuration of the semi trailer is reduced. The original configuration was agreed to be able to pull 50 tons, but he reduced it to 30 tons. Then it is reasonable that the flatbed semi trailer has broken beams. Second, it is produced in a newly built small factory. The materials and technology of the small factory are not mature. A series of problems such as inferior steel and cutting corners may occur, and the probability of broken beams is greatly increased.
Reasons for user use
1. Overload or even concentrated load
In addition to the reasons for the trailer factory mentioned above, many broken beams are caused by improper use by users. Many reasons are long-term overloading, which is easy to understand. The cargo capacity exceeds the design value of the semi trailer, and the beam cannot bear the weight of the cargo and breaks. Then there is concentrated load, especially the popular light-weight trailer. The trailer with concentrated load is easy to break the beam.
2. Welding operation on the beam
It is also strictly forbidden to weld on the beam of the semi trailer. The beams of the current trailers are mostly high-strength steel. High-strength steel is easy to anneal when encountering strong current, and the beam is easy to break after annealing.
3. The beam in mountainous areas is subjected to excessive torsional force
Trailers that often run in mountainous areas are prone to broken beams. The torsional force borne by the beams of trailers running in mountainous areas is much greater than that of those running on flat roads. The specifications of the upper and lower wing plates and web plates of the beams must be larger, otherwise the beams are easy to break.
Pay more attention to light-body trailers
Drivers who use light-body trailers should pay special attention. Light-body trailers cannot be overloaded, let alone concentrated loads. High-strength steel beams have poor flexibility and are not suitable for overly bumpy roads. Be sure to pay attention, otherwise the beams may break.
Can reinforced beams be used?
If the tragedy of broken beams really happens, the solution given by semi trailer manufacturers is generally reinforcement. So can reinforced beams be used? The editor asked several salesmen, try not to use it, there are too many hidden dangers.
First, the reinforced beam is definitely worse than the original beam in terms of load-bearing capacity, and you will be nervous when loading; second, it is easy to break again. Many friends have also said that it will break wherever it is connected; third, trailers with reinforced beams are prone to tire eating.
How to avoid broken beams?
How to avoid broken beams of semi trailers? Analyzing the above reasons for broken beams, choosing a reputable salesperson when buying a semi trailer and choosing a large manufacturer such as Lionkar semi trailer, which has been in the industry for many years, can avoid a lot of trouble. In addition, you must pay attention when using it, do not overload, weld the beam privately, and pay attention to the road conditions for light-weight trailers.