2023 Author: Philip Bishop | [email protected]. Last modified: 2023-05-24 22:24
- The main types of anchors
- Drop-in anchors, brass, steel
- Wedge anchors with nut
- Rod clamps
- PFG anchors
- Brass anchor MSA
Should you nail anything to a concrete wall? Or are there any more efficient ways of fastening? These and other questions will be answered by this article, which tells about the current fastening devices - anchors, we will figure out what an anchor is and what types of anchors are. The range of anchors on the market is represented by an innumerable variety of different modifications, for example:
- blade anchor KA;
- drop-in anchor LAH;
- rod anchor RU;
- rod-shaped anchor TA;
- screw anchor RA;
- mortgage anchor SORMAT, DRIVA;
- brass anchor MSA;
- anchors MTA, KVTM, PFG, OLA, and so on.
When carrying out finishing, repair, or construction work, it is impossible to do without fastening devices. These can be screws or nails, that is, devices that themselves, without any additional parts, are able to fasten materials and withstand the corresponding load. They can be applied to sheets of drywall, wood, or thin elements made of metal, the fixation that occurs between these simple fasteners and the base is enough to effectively fix and perceive the loads on this structure.
However, if the base is made of stone, concrete or brick and has a greater (compared to lightweight materials) hardness, then the use of such an attachment will not be able to solve the arising problems. In order to be convinced of this, it is enough just to try to drive a nail into a wall of concrete, and the validity of this statement will immediately become clear.
Anker is translated from German as “anchor”, and this name fully explains the principle of its functioning. The fastening element is not fastened directly to the main array, but using dowels or anchors, which are created in order to provide the desired coupling moment.
The conclusion is that it is extremely difficult to make a concrete separation between the dowel and the anchor.
We have the opinion that a dowel or anchor is a part that, in some (chemical or mechanical) way, increases the bond between the main product, which should be attached to the base. To the level at which these elements are able to transfer the load assigned to them. In general, the dowel is a lighter type of anchor.
The main types of anchors
The field of application of anchors during construction work is the fastening of heavy structures. When carrying out repair work in an apartment, anchoring is mainly used when fixing window and door frames, when attaching suspended ceilings, and also when installing chandeliers and lamps. Now it is clear what an anchor is. Let's move on to the types and places of application with photo examples.
Drop-in anchors, brass, steel
Drop-in anchors LA, LAH. This is the simplest type of anchorage that has an internal thread. It is used for installation in stone, brick or concrete structures. It is inserted into a pre-drilled hole of the required diameter and depth. The hole for this type of anchor (as for all others) must be pre-cleaned. After the anchor is inserted into the hole, it is unclamped with a special device, with the help of which the desired degree of adhesion is achieved. Following this, a fastener suitable for the thread is screwed into the anchor. This type also includes the MTA anchor, which is used for foundations with internal cavities.
Wedge anchors with nut
Wedge anchors KA. They are made using different technologies and are electro-galvanized KA, acid-resistant KAH, and hot-dip galvanized KAK. Equipped with a special blade, which expands during installation and is fixed in the hole. Allows through fastening through the base-mounted material. It is inserted into the prepared hole, driven in with a hammer and tightened with a regular wrench. The products of this type include screw anchors RAR-stainless, or RA-electro-galvanized. These types of anchors are equipped with a countersunk head screw. This allows them to be used for fastening door and window frames. In the process of tightening the screw, the anchor blade is securely fixed in the mounting hole.
The RU anchor rod works on the principle of a wedge anchor, it is made for installation through several cladding and insulation layers. An additional quality of such products is the ability to install it at a slight angle to the surface. The expanding wedge fixation method is also used in the TA rod anchor. This product, equipped with an internal thread, complete with a rod, which can be cut if necessary to bring it to the required length, can be used to attach several layers of materials. After driving the anchor into the fastening hole, the fixed element is fixed to the rod using a washer and a nut.
PFG anchors are internally threaded and expand when the inserts are screwed in and effectively lock in the socket. The PFG anchor can be used in combination with the IR insertion bolt, the AK hookhead bolt, the VR conical bolt, the SR loop bolt or the IHH, IH insert sleeves. This anchorage is used for work on hard foundations.
Brass anchor MSA
The constructive basis for this type of anchor is concrete, stone or brick. The brass sleeve of this MSA anchor is equipped with a tapered (threaded) internal cavity that gradually tapers towards the tip. With this narrowing, in the process of tightening the screw, the sleeve expands and is tightly fixed with its uneven walls inside the mounting hole made in the base.