Have you ever wondered how those huge LED screens are firmly fixed to the wall? Especially when you see the large advertising screen on the exterior wall of the mall or the giant stage background at the concert, they will not fall off even if they are blown by wind and rain. What secret weapon are they relying on? To put it bluntly, a key part needs to be used at this time - the iron corner code, but many people may not even hear of this name. Today we will break it apart and talk about when and how to use this thing to be safe.

Let’s talk about the three most common situations where iron corner codes must be used. ​ ​The first is the installation of architectural curtain wall​​Just like the P4 curved advertising screen project our company has done for Singapore, the entire screen is hung outside the 30-meter-high glass curtain wall. At this time, each connection point must be tightly bitten by galvanized iron corner codes. Why? Because when the typhoon blows, the wind pressure on the screen is equivalent to four adult strong men standing per square meter, and ordinary screws cannot withstand this force.

​​The second type is stage rental screen​​For example, our rapid disassembly and assembly of aluminum, magnesium, zinc boxes must be repeatedly assembled every time we tour. The floor tiled screen made for a Korean music festival last year, each screen has reinforced iron corner codes hidden in four corners, and the actors can jump on it for three hours without any problem. There is a way here - the surface of the corner code must be rust-proof, otherwise the sweat will rust after two months of dripping on it, and suddenly the screen will fall off during the performance, which will cause a big problem.

​​The third type is the fence screen of the stadium​​Like the fence screen project of the football field in Tokyo, each support point uses three sets of corner codes to form a triangular stable structure. There is a pit here: Don’t try to save trouble and screw less when installing. We have encountered peers cutting corners, but the screen collapsed midway through the season and directly smashed the three-row auditorium seats. Remember, the corner code fixation must be detected with a torque wrench, and the tightening force of each screw must be as accurate as weighing with an electronic scale.

Someone may ask: Isn’t magnetic installation popular now? Why do you have to use this iron lump? Let’s talk about the data: the P3 outdoor screen of the same size has an ultimate load bearing capacity of 200 kilograms with magnetic suction brackets, while the steel structure with iron angle codes can withstand 800 kilograms. Last year, Typhoon "Mangosteen" landed in Shenzhen. A commercial screen with no corner code at Bao'an Airport was blown into a "flying carpet", while the test screen on the roof of Huike Industrial Park remained motionless, which is ironclad.

Let’s talk about the point where novices are prone to falling apart - corner code selection. Our special angle code for stadium fence screen is serrated with serrated lines. It can be 1.2 mm deep into the steel structure during installation. It is impossible to do ordinary flat angle codes. Last year, when the construction team used ordinary corner codes to renovate a stadium in Southeast Asia, the construction team used a cheaper one. As a result, the season was only halfway through, and 25% of the connection points were loose, so they had to repair them overnight.

Here are three ways to test yourself:​​First look at the coating​​, use the key to scratch the surface. The one that can leave obvious scratches must be inferior galvanized； ​ ​The second thickness​​The standard angle code must be at least 2.5 mm, and many counterfeit goods only 1.8 mm.； ​ ​The third test thread​​, screw the bolt in and then exit. If there is black debris on the thread, it means that there are too many impurities in the steel.

Finally, let’s talk about the inside story of the industry: Some installation teams will reuse corner codes as consumables, which is a taboo! Especially for the beach project, the dismantled corner code looks intact, but in fact the internal crystal phase structure has long been corroded by the sea breeze. Our project in Da Nang, Vietnam suffered this loss. The reused corner code broke collectively after three months, almost causing a major accident. So remember: if you need to change the corner code, you can change it as soon as possible. Saving this little money is not enough to compensate for medical expenses.

After all, the iron corner code is like the "joint" of an LED display. It looks inconspicuous and can save lives at critical moments. Next time you see the shiny large screens on the street, you might as well pay attention to the small metal parts they hide in the corners of the corners - maybe what you find is the unsung hero who protects the safety of the entire screen.

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