Billboard is a special type of signs regarding structure and size, with the size range of 50m2 to 250m2 depending on each work and construction location.
In terms of the structure, billboard will be erected by the system of iron or reinforced concrete piles, root of the piles is buried and concreted. The frame of billboard is made of iron; workers will weld to have hard texture. The surface of the billboard is Hiflex canvas and is printed or consists of stainless steel Braille. For the safety of the workers and people as well as the aesthetics of the construction site, billboard are tightly managed and planned by the authorities.