Together with the change of construction technology is also developing technology holders. With the advent of new technologies and new materials come new solutions in this area. Currently we have different types of fixtures, according to the degree of specialization depending on the type of substrate and the required strength of the connection. Below is given the basic information regarding the art fixtures, installation and selection rules dowels and anchors. Drilling and preparation of the holes. In order to prepare the hole, not only to choose the type of drill with the appropriate diameter.
One of the main problems is the choice of method of drilling. There are four main Drilling method: rotary, percussion, hammer (molotkoboynoe), others using professional equipment. The basis of selection is the type of foundation. Rotationally shock or molotoboynoe drilling needed use in dense and porous materials with a dense structure. Rotary drilling is carried out in hollow materials and plates, so as not to spoil the structure of the material and does not lead to an increase in the diameter openings. Parameters of erection. To perform the proper installation and receive the appropriate quality retention is necessary to consider the following guidelines and recommendations.
1. Should pay attention to whether structurally this plug (Anchor) this head. 2. In designs of hollow elements (perforated bricks, hollow blocks, etc.) spacing of anchors shall be secured at least one of the partitions, or should use the anchor with a profile link. 3. Should choose the length of the dowel (anchors) in accordance with the thickness of the attachment object. 4. The hole should have an appropriate depth, a few mm more than the length anchoring, and be cleared of debris. 5. To determine the depth of embedment should be taken into account bearing layers or non-cohesive base (thickness of plaster or insulation layer) and adjust the length anchors (anchors). You should avoid mounting anchors too close to the edge of the base, since at high loads can occur destruction of the attachment or detachment of the material edge. 6. Do not exceed recommended tightening forces dowel – to use a torque wrench. 7. To find the correct mounting in plasterboard walls, use only plugs designed for these materials. Caution. You should always carefully select the dowel or anchor for a given building material. Poor selection can cause defective assembly and low strength performed by fixing. You should always carefully cleaned from the hole debris.