With the rapid development of the economy, we know that outdoor billboards are based on different heights, including landing billboards, wall billboards and roof billboards. And because of different advertising content and location importance, it is divided into first-level billboards, second-level billboards and three-level billboards. Let's take a look at the small series below.
The more important the billboard, the longer the service life, the first-grade billboard design is 20 years old, the second-level billboard is 5 years, and the third-level billboard is no more than 5 years. Newly installed outdoor billboards need to be tested for safety for 2-3 years; billboards that have been used for safe inspection, and billboards with paint anti-corrosion can be used for another 2 years, and billboards with hot dip zinc anti-corrosion can be used again. Use for 5 years. Thereafter, the anti-corrosion billboards should be tested every 2-3 years, and the hot dip zinc anti-corrosion billboards should be tested every 5-8 years.
The outdoor billboard detection content mainly includes:
1. The strength of the steel structure and the quality of the billboard installation;
2. Appearance inspection of steel structure anti-corrosion and joint connection. The material selection of billboards is mostly Q235 and Q345 steel. Because it is exposed to nature for a long time, wind and rain are hit, rust is inevitable, and it needs to be tested frequently;
3. Detection of anchor bolts and billboard foundations. There are two kinds of effects exerted on the billboard, one is permanent and the other is variable. Like the weight of the billboard itself, the weight of the lighting settings, etc., they existed with the day the billboard stood up, and these were permanent.
4. Safety inspection of electrical appliances and lightning protection grounding systems.
