Questions and Answers
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Do I have to paint my flagpole in red and white stripes?
Read more: Do I have to paint my flagpole in red and white stripes?Updated: September 2026 · Legal status: August 2026 The marking of a mast—including its paint scheme and lights—is determined by regulations governing aviation obstacles, not by its height alone, regardless of its location. A previous version of this post cited a 2003 regulation that has since been repealed; the thresholds we listed there are no longer in effect. When a mast is an obstacle…
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The county office is waiting for a building permit for a mast on the building—is it right to do so?
Read more: The county office is waiting for a building permit for a mast on the building—is it right to do so?Updated: September 2026 · Legal status: August 2026 It depends on the height of the structure and whether the installation interferes with the building’s structure. The old ruling we cited here (Provincial Administrative Court in Gdańsk, II SA/Gd 329/14) was based on a numbering system for the provisions that is no longer in effect following the 2020 amendment—which is why we are describing the current situation.…
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Does the mast require a building permit?
Read more: Does the mast require a building permit?Masts under 3 metres do not require a permit. Masts over 3 metres on buildings are subject to notification unless local regulations require a building permit.
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How to properly arrange mast guy wires?
Read more: How to properly arrange the mast guy wires?The general rule is that guy wires should be arranged symmetrically—in three-cord masts, every 120° in the horizontal plane. As for the distance of the anchor point from the mast axis in the horizontal plane, it is assumed that it cannot be less than half the height of the mast. For example, for a 50-meter mast, the anchor point for the guy wires should be no closer than 25…
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How do you safely install antennas on a mast?
Read more: How can I safely install antennas on a mast?A telecommunications tower, like any truss, has node points that are its strongest areas. It is best to apply any forces in the vicinity of these points, as this minimizes the risk of localized damage to the structure. This is important in practice when installing additional guy wires, securing ropes during the rotational erection of a tower, and when selecting anchor points for antenna booms. A node is a point…
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What is a separation crown used for?
Read more: What is a separation crown used for?The separation ring serves two purposes. The first is to physically separate the transmitting antennas—such as sector antennas—from one another. Antennas emit back radiation, which can lead to interference and signal disruption. Since the strength of the electromagnetic field decreases with the square of the distance, even a small separation significantly reduces the mutual interference between antennas. It is worth checking the device specifications to determine the minimum…
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How does aluminum welding technique affect weld strength?
Read more: How does aluminum welding technique affect weld strength?The quality of the weld is crucial to the safety of the product. At AluPro, we weld aluminum exclusively using the TIG method, with Fronius and Kemppi machines. TIG welding is a slow process, but it guarantees deep penetration and full control over the quality of the weld. This method produces very clean and aesthetically pleasing joints—which is particularly important for components that require both strength,…
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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 a mast is determined by three main factors: material cost, production time, and the quality of workmanship. At AluPro, we prioritize the highest quality—we do not strive to be the cheapest on the market at the expense of workmanship and safety. The cost of aluminum—the primary structural material used at AluPro—is subject to dynamic changes. In just one year, the wholesale price of the material has risen…
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Are there any antennas for which the stiffness of the mast structure is of particular importance?
Read more: Are there any antennas for which the stiffness of the mast structure is of particular importance?Yes—these are primarily all types of radio links and satellite links, characterized by a focused and directional transmission beam. With a standard deviation from the vertical of 1:100 of the height, on a 30-meter-high mast, the displacement of the top reaches 30 cm. Over a distance of several kilometers, this results in a deviation of several hundred meters in the antenna axes, which directly affects the quality of the link.…
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How to choose the height of a mast or tower to suit our needs (the case of a radio link)?
Read more: How to choose the height of a mast or tower to suit our needs (the case of a radio link)?In telecommunications, optimal antenna placement is determined by Fresnel zones, which ensure that their area is free from obstacles and minimize energy losses.
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