All you need to know about “crabs” for profiles

Everything is written in this article that you need to know about “crabs” for profiles 60×27 and other sizes. Connecting “crab” for drywall and connector-system for profile pipes. Clearly indicated exactly how they should be fixed.

What it is?

Different fortress and steadily working frame for drywall can not be created without the use of specialized connecting parts. These so-called “crabs” for the profile received their name due to visual similarity with the famous inhabitant of the seas and oceans. But the coincidence, of course, by chance.

To obtain such details, it is customary to use galvanized steel special varieties. Experts agree that without such connecting blocks, it is not necessary to count on the strength and rigidity of the metal base under GLC.

They guarantee the docking of direct corners to each other of the guides and shell parts in a single plane. Yes, it becomes possible to mount sheets in arbitrarily selected planes. This circumstance will help make repairs easier and faster. Even if the installation of sheets is planned for the ceiling at home or other premises. But the described system for profile structures can be used not only as part of the plasterboard crate.

It is still used:

  • for the formation of barriers (partitioning structures) inside buildings;

  • as a connector for complex ceilings in the form of suspended;

  • To unlock heterogeneous metal structures (in this case, the connection point should be in the middle of the “launch”).

Additionally, “Krabic” may be required when forming:

  • diverse greenhouses;

  • Arbor;

  • tents for trading;

  • winter gardens;

  • advertising structures;

  • bird cells;

  • office and home partitions;

  • Frames of small pools;

  • architectural forms of various kinds.

Main characteristics

Connecting crab is a cross-piece unit obtained by metal stamping. The total thickness of the product ranges from 0.6 to 0.8 mm. Crab has curly “foot”, rejuvenated to the side. Such petals are just becoming specific “mustache” capable of snapped on profiles.

The zinc layer is applied to ferrous steel.

But the designers did not stop at this and have provided auxiliary pair of “paws”, all sides of which were equipped with holes. This is no coincidence – such a technological solution increases the strength of the compounds. It is guaranteed anyway, even if the impact on the frame will be 20-25 kg per 1 m2. Located in the center of the axis are equipped with mounting holes. Through these crab holes, you can put directly to the serviced surface or by means of an adjustable suspension.

An important advantage of such elements is that it does not need to use gas or electric welding for their installation. On the strength of the compounds created, it will almost not affect. The main properties of profile “crabs”:

  • suitability for multiple use;

  • performing a dismantling with one velocked key, in the absence of other tools;

  • latitude of operating areas;

  • homogeneous dispersal effort attached to frame;

  • Compatibility strictly with small-sized tubular profiles (the connector on large pipes will not work);

  • The suitability for docking pipes is only under right angles;

  • Danger of destruction of the connection;

  • problems with the geometric characteristics of frames;

  • Probability of corrosion changes (without special processing).

Quite often use “crab” for steel parts in size 60×27. A typical connector of this format has a dimension of 148×148. It is mainly used to mount the plasterboard on the ceiling. And it is in similar quality a product of category 60×27 are present in various directories. But for greenhouses and other tubular structures are preferred “crabs”:

  • 20×20;

  • 40×20;

  • 50×50.

Review of species

There are various types of binding elements of the “crab-shaped” format. So, the T-shaped structures provide docking at once 3 pipes of a minor cross section. Installation with such a device is very simple. Mr.-shaped execution, which ensures the fastening of the pair of pipes on the corners of the formed buildings. And the X-shaped connectors provide a reliable docking 4 pipes, located in the middle of the formable assembly.

Along with galvanized metal, products covered by specialized composition can be used. Two separate blocks one way or another are connected by a bolted method. “Crabs” of the described species use for pipes from 20×20 to 40×40. Since the strength of the created assembly is small, remove the pipes from the attachment will be very easy. On the street “Crab” will need to constantly tighten into avoiding skew.

The difference between “crabs” is associated with the number of their levels. 1-level type guarantees very strong docking frame profiles. Provides strict perpendicularity of them. What is important, the assembly of metal structures is simplified. This is especially characteristic of extended areas where you need to put a lot of spinning items, achieving maximum hardening of the crate.

Special mustache details increase the stability of the joints; Single-level fixtures allow you to design a GLC surface of buildings located in the same plane.

But two-level solutions can be used. “Butterflies” – it is a bracket in the form of the letter. For their manufacture, apply leaf steel with zinc coating. The sidewalls are equipped with special hooks, which allows you to mount the frame of multi-level ceilings. In production, such a connector is plane, fused to the desired form immediately before use.

How to locate and attach?

To install “crabs” passed effectively, it is required to carefully calculate. Otherwise, the high strength of the design and its durability is unattainable.

Proper installation involves drawing up drawings. According to compiled schemes need to be placed the treated surface. To install fastening “crabs” correctly, you will have to take into account that their fixation points are required to correspond to the points of docking elements (sheet materials and not only).

“Crabovoid” devices are mounted due to the use of special screws. They have a cylinder head. Fasteners equipped with a pointed tip. When they are spinning, the metal breaks through. In this case, the edge loses its initial evenness and bends inside.

Moreover, you will have to edit the mustache parts, screw the hardware. But this is done strictly following how the fastener itself snapped on the frame. Place the plane and calculate the required number of nodes should be done from the central point to the edge, and not vice versa. Method of fastening products with a single level:

  • orientation of fasteners by technical petals down;

  • Range to metal films;

  • Lape bend and attaching them to the “klopic” to the main profile;

  • inserting inside “grinding” of spinning parts until they click;

  • fixation of these jumpers with screws;

  • Attaching other elements.

To connect anything with duplex “crabs”, required:

  • attach the carrier profiles to the main;

  • give the product to the product used

  • insert it over the main profile until it is possible to click;

  • Press the regular position with self-draws;

  • Put the guide bar at an angle of 90 degrees to the main bar;

  • Enter hooks in profile grooves.

ATTENTION: Losing mustache need as much as possible. Having attached too much effort, you can break the metal.

The following video will help you better get acquainted with the process of installing “crabs”.

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