Technologies
Stainless steel – What grades?
Read more: Stainless steel – What grades?Some of our structures receive stainless steel accessories for an additional fee. Have you wondered what this means in practice? Well, commercially we distinguish two "levels" of rustproofness. Here's how it should be understood (we quote from marmech.eu) Stainless steel - this is a common term for a group of corrosion-resistant steels, in a little more detail we can divide them into corrosion-resistant steels...
Anti-fall system – what is it and how does it work?
Read more: Anti-fall system – what is it and how does it work?Working on towers and masts can be dangerous. This can be seen from the manufacturers' recommendations, which suggest that no work should be carried out on structures when winds exceed 5 m/s. Fortunately, we have occupational health and safety or mountaineering harnesses at our disposal, which significantly increase safety, although rarely comfort. Changing position on the mast is particularly uncomfortable when each step means having to re-attach the reins...
How to remove lightning from a mast safely? Basic knowledge.
Read more: How to remove lightning from a mast safely? Basic knowledge.There are three main issues to consider when dealing with lightning protection from telecommunications masts. In our opinion, the best and cheapest way to dissipate the electric charge is to use a mast or truss tower structure. Alupro solutions are equipped with a special eye in the lowest segment that allows the entire unit to be connected to the building's lightning protection system. In the case of painted structures, remember to remove the coating…
Do I have to report radio wave emissions to any department (e.g. environment)?
Read more: Do I have to report radio wave emissions to some department (e.g. environment)?Apart from the issue of licensing for specific frequency bands, there remains the issue of electromagnetic radiation in the context of environmental contamination. Current regulations allow the emission of a maximum of 15W of power on the antenna without the need to report this fact to the Environmental Protection Department (in this case, we are not dealing with an investment that has a significant impact on the environment).
How to properly arrange mast lashings?
Read more: How to properly arrange the mast lashings?The general rule is that it is optimal to place the lashings symmetrically - for three-curb masts, every 120 degrees when viewed in horizontal projection. As for the distance of the lashing from the mast truss in the vertical projection, it is generally accepted that the distance from the anchor point cannot be less than half the height of the mast. For example, for a 50-meter mast, the anchor brand…
How to install antennas on a mast safely for the structure?
Read more: How to install antennas on a mast safely for the structure?A telecommunications mast, like any truss, has nodal points that are its strongest places. It is worth applying all forces around the nodes, as this minimizes the risk of damaging the whole. This is important when installing additional guy ropes, attaching ropes when erecting the mast using the rotary technique, or even when selecting anchor points for antenna booms. A nodal point is a place…
What is the separation crown used for?
Read more: What is the separation crown used for?The crown has two tasks, the first one results from the need to move apart the transmitting antennas, e.g. sector antennas. Antennas have back radiation which can lead to interference and interference. Because the strength of the electromagnetic field decreases with the square of the distance, even a small separation significantly weakens the interaction of the antennas. It is worth checking the specifications of the devices to determine the minimum recommended antenna separation by the manufacturer. The second task…
How does the aluminum welding technique affect the weld strength?
Read more: How does the aluminum welding technique affect the weld strength?The quality of the weld is crucial for the safety of the product. At Alupro, we weld exclusively using the TIG technique on the best Fronius and Kemppi machines. TIG welding is quite slow, but it guarantees deep penetration and high control over the quality of the weld. This is a method that allows you to obtain very clean and aesthetic welds, which is especially important in the production of elements that require…
What makes some masts more expensive and others cheaper, where does the price come from?
Read more: What makes some masts more expensive and others cheaper, where does the price come from?The price of the mast is determined by three main factors, namely the cost of material, time spent on production, and quality of workmanship. AluPro offers products of the highest quality, we do not try to be the cheapest on the market at the expense of workmanship and safety. The cost of aluminum, the main construction material in AluPro, is subject to dynamic changes. The wholesale price of the material has changed by almost...
Are there antennas for which the stiffness of the mast structure is particularly important?
Read more: Are there antennas for which the stiffness of the mast structure is particularly important?Yes, these are all types of radio lines (and satellite links), with a focused and directional transmission beam. Assuming the normative deviation of the mast from the vertical by 1:100 of the height, the height of the mast is 30 meters - the displacement of the top reaches 30 cm. Over a dozen or so kilometers of transmission, this gives an antenna spacing of several hundred meters. One of the techniques to combat this unfavorable phenomenon is to install a crown…
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