The mechanism for fixing brittle wall materials has its own characteristics. These should be special fasteners that provide minimal load on the structure in areas of small area. Aerated concrete blocks are a classic example of a building material with a cellular structure, prone to destruction under direct mechanical stress. Therefore, hardware is also produced for them with certain characteristics and a structural device. Correctly selected fasteners for aerated concrete will ensure the durability of the walls, their physical protection against accidental external influences, and in some cases also act as an auxiliary element for additional equipment of the building structure.
Varieties of fasteners
The most popular are typical hardware in the form of dowels and anchor clamps. They are distinguished by durability, reliability and delicacy of mechanical impact. For example, a nylon dowel is characterized by a soft surface structure that protects the contact patch with aerated concrete from excessive physical exertion. In addition, depending on the device, the plastic nozzle can serve as an additional means of increasing the adhesion qualities in the fixation zone.
Separate groups of external overhead attachments designed to maintain the desired position of aerated concrete blocks are also common. This category includes angles and staples, thanks to which a larger support area is covered, which reduces the risk of damage to the structure. For example, the reinforced mounting bracket is made of galvanized stainless steel, which can be used on the outside with access to the street.
Standard dowel for aerated concrete
The classic hardware for fixing the cellular blocks is represented by a yellow zinc dowel. Its upper part acts as the supporting base for holding the four blades. The rod is designed to provide rigid fixation and at the same time for correct positioning. It is important to emphasize that fasteners for aerated concrete of this type can have a studded surface that adds to the element adhesive qualities. In fact, this is a replacement for the nylon shell, but with a greater degree of reliability of the coupling. In general, the standard dowel is a simple and affordable hardware used for a wide group of soft-wall materials. The only drawback is perhaps the need to drill a preliminary hole with a hammerless drill.
Features dowel KVT
Elements of this family are made in the form of a rigid cylinder, which is also distinguished by the presence of screw cutting. The differences between the modifications of this hardware are mainly determined by the type of material - again, nylon or zinc alloy. KVT nylon dowel for aerated concrete is additionally marked with the letter H, while the metal alloy has the prefix M. Both versions are characterized by a wide thread that runs along the entire length of the element. As for the purpose, the shape and structural features of such fasteners are optimally suited for fixing auxiliary components on the structural base of the aerated concrete block. The loads are distributed over the entire area that the long dowel captures, which prevents the risks of concentration of force at one point and, as a result, fracture of the material.
Features of the front dowel
In this case, the possibility of implementing a through installation of hardware is provided. That is, the dowel passes through the entire block, also evenly distributing the load along its structure. Among the structural differences, the elongated part of the disclosure of the core base and the countersunk cylindrical shape can be noted. This allows the use of a facade metal dowel for aerated concrete in order to fasten products of large thickness. The element itself is not thick, so we can talk about minor interference in the structure, however, a long body, coupled with wide blades, still allows the tooling to cope with increased loads, protecting the unit from damage.
Block nails
This type of fastener is not so often used in relation to soft-body building materials for the reason that the clogging technique in itself determines the risks of damage to the structure of the blocks. Nevertheless, thanks to the special design of the liner, this problem is also eliminated. Like a soft nylon dowel, NEMA type nails can be deformed during the driving process and, under bending, can accurately enter the structure of aerated concrete with a small angle of exposure. Spiral nail models marked Turbo Fast are also in demand. They are made of galvanized steel and, as the name implies, have a spiral design. However, installation is carried out not by twisting, but by the same soft-clogging technique. The element is introduced into the cellular structure, providing reliable coupling of the target area with an additional functional component.
Anchor fasteners for aerated concrete
In the families of fasteners of this type, models with the designs of screws, bolts, driven and wedge hardware are presented. For critical fixing tasks, anchor screws made of carbon steel are used. They allow fixing without the risk of cracks in stretched mounting zones. Wedge modifications also enable reliable installation at points with expanding cracks. A feature of this type of fastener for aerated concrete is the ability to integrate along the edges of the block, which are the most risky in terms of fault sections. As for driven anchors, they are calculated on the formation of structures for medium and high loads. Moreover, the configuration of the placement of elements involves the exposure of a small step. That is, for example, static structures in the form of stairs, balustrades and frame bases will be fixed by a large number of elements compared to the facade dowel.
Mounting brackets for aerated concrete blocks
Unlike the above hardware, this variety is not intended for power retention, but for fixing auxiliary communications. The device is formed by two components - directly fasteners and a bracket, which is a round base with a recess for cable or pipe integration. The fixing part can be either metal or plastic. For example, propylene or glass-filled nails are often used. With such a snap, the mounting bracket, of course, will not be able to cope with increased loads, but the task of holding the wiring in increments of 1-2 m is quite within her power. By the way, standard models of this hardware are designed for servicing non-thick lightweight lines with a thickness of 7-25 mm.
Corners for aerated concrete
Unlike staples, the corners are designed specifically for additional reinforcement of the structure. A typical equilateral element is represented by a metal plate bent at right angles with perforated uniform sides. There are anchor modifications, which may have disproportionate parameters of height, width and length. These are versions for the formation of non-standard attachment points with the possibility of using several types of clips in one element. In turn, the reinforced mounting bracket is distinguished not only by the aforementioned galvanized base, but also by the presence of stiffeners in the structure. Their presence allows you to create stable joints in which aerated concrete, massive beams, metal structures and thick finish coatings can participate.
Conclusion
You should choose according to size characteristics, design features and material of manufacture. Initially, it is worth calculating how the loads will be distributed. This will allow you to choose the optimal design and evaluate the approximate configuration of the placement of elements. For example, in the question of what fasteners to use for aerated concrete over a large masonry area, it is not the type of hardware that will be important, but the arrangement. On the surface of the wall to which the massive structural object is attached, it is possible to use both an anchor and a dowel. The main thing is to correctly calculate the step and the number of elements. In addition, it will be useful to provide safety nooks. At the same time, it is not necessary to oversaturated an already fragile surface with foreign rods. High-quality, deep-seated fasteners will completely cope with medium-level loads.