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  In addition to construction, there is also maintenance and repair tasks when it comes to buildings. Contractors choose scaffolding systems depending on the type of work they have at hand – this article explores the options on offer. Steel Scaffolding Steel scaffolding is made up of steel tubes which makes it quite a robust scaffolding system. Such a scaffold can be used for work on a building’s exterior. It can reach great heights without affecting the safety of the scaffold, and it can also withstand harsh weather conditions. It can carry heavy loads therefore increasing efficiency and saving time. Suspended Scaffolding As the name suggests, suspended scaffolding refers to a scaffold system that hangs from the ceiling of a building. These scaffolds are normally used for interior projects, such as painting, electrical work, repairs, etc. They can reach great heights and complete the work by employing a quick and efficient scaffold that is easily adjusted according to the situation. M

  How it all works The focusing lens in a Co2 laser cutter/engraver converges the laser beam to form the focal point of the laser cutting or engraving material. This point is located at the sharpest point of convergence of the beam and is often referred to as the "spot size". Several factors can affect this spot size, which will ultimately determine the outcome of your project. The purpose of this article is to explain these differences and give you a better understanding of which lens is best for you.   What are the different options? The most common lens options are 1.5, 2.0, 3.0 and 4.0 inches. These measurements are the focal lengths needed for each lens to focus perfectly. For example, a 1.5-inch lens needs to be exactly 1.5 inches above the surface of the material to focus correctly. The main factors that distinguish each lens are spot size and depth of focus. The smaller the lens, the smaller the focal length and spot size.   What is the difference between them and whi