Nagel on concrete - characteristics and application in

25-02-2018

Building

The density of concrete in many ways is very high, which makes it an ideal building material for the construction of walls and floors. However, it is very difficult to install fasteners for shelves, chandeliers and other "mounted" parts of the interior. In this article we will look for a solution to this problem, and the nog will help in this.

In the photo - nog for fixing elements on a concrete surface

What is it and where is it applied

It is a conventional screw with a reinforced rod and hex head, which can be screwed into the concrete.

In addition to small items, they can be used to strengthen:

door frames;
frames;
fencing;
pipelines;
heating radiators.

Below we will understand in more detail the types of such fasteners, as well as how to use Nagel on concrete correctly.

Kinds

Hardware products used for installation in concrete surfaces are usually classified according to the following features:

Head shape	Secret (conic with cross-shaped slots). Hexagon (for open-end wrench and spanner wrench, thread - internal, slots - crosswise). Hardware-studs having a threaded sgon under the nut. Screws with a rectangular or hook-shaped tip, may be rounded.
Type of protective coating	Galvanized (silver) hardware, which are used in different places - inside and outside. Copperplated (yellow) products - used only for interior work. Blackened (black) screws may only be used in rooms with normal humidity.
The shape and pitch of the thread on the rod	Universal hardware - their length is 12-220 mm, O 3-6 mm. On a core the usual carving in the form of a screw flute is cut. The instruction permits them to be mounted in the mounting hole (where the dowel is pre-installed) and directly into the wall of foam concrete. Universal screws with herringbone knurling on the rod. They are mounted only in the mounting holes with a polymer sleeve (dowel). The depth must exceed the length of the hardware by 3-5 mm. The length of products - 12-200 mm, O 3-8 mm. When installing, use a conventional or impact screwdriver. Nagel - screws having variable threads. They are screwed into the walls immediately without prior reaming. This is its peculiarity. Screwing is carried out with an impact screwdriver and passes without delay. The length of the hardware - 70-200 mm, and the diameter of the same 7.5 mm.

The shape of the head directly affects the installation of the screw. For example, screws in the form of hooks and studs are allowed to be installed only in the hole, pre-drilled and with a dowel. Other self-tapping screws are screwed in with or without drilling.

For example, screws with hex or countersunk head are screwed in without drilling a hole. However, not every concrete is suitable for such installation.

Screw with variable thread and notches along the entire length of the rod

Tip: Cellular concrete is best, and reinforced concrete is not suitable for this installation method.

The price of self-tapping screws depends on their sphere of application, the shape and pitch of the thread, and the length of the hardware is also affected. With the "herringbone" products will be cheaper nogers and universal, and a screw with a length of 12 mm will cost less than 200 mm, since less material and working time will be spent on it

Choose and install the screw

Usually, screws for concrete are selected according to the size of the load that they will have to withstand due to the weight of the interior details. For example, to support 100 kg, you will need a self-tapping screw with a length of 160 mm and O10 mm, while a shelf weighing 5 kg will be held by a self-tapping screw with a length of up to 25 mm and O3 mm.

Screwing the dowel into the concrete base with a key

After determining the type and size of the product, you can proceed to the installation procedure. In this case, the dowel and universal screws are allowed to be screwed into the wall (floor or ceiling) immediately, without doing the preliminary drilling of the base, while at the same time it will be necessary to tinker with the herringbone screw.

Tip: the screw with the "herringbone" should be installed in the mounting hole, the diameter and length of which should exceed its dimensions by 5 mm.

This is due to the fact that after drilling, it is required to install a dowel (preferably in the tension). It can be from polymeric materials or wood, its main duty is to accept and hold fasteners. You can screw the screw into the dowel with your own hands with an ordinary screwdriver.

Tip: after drilling a hole, remove dust from it.

How to screw a screw without dowel into a concrete wall

It is important to properly use the screw, otherwise it can simply break off. It is necessary to tighten the screw with a non-invisible head with a certain effort, making sure that during the process it is not broken by elementary drawing. You can also break off the head due to the high temperature of the screw body when screwing into the concrete.

Conclusion

From the article you learned that concrete is considered one of the most practical materials for placing various elements on its surface. To do this, use metal products in the form of screws, anchors and, of course, dowels, which differ from others in the possibility of screwing the ceiling or the wall into the wall without first preparing the mounting hole.

The latter has a different shape of heads and is used for exterior and interior work. The video in this article will help you find additional information on this topic.