The formwork clamping screw is one of the most important elements in the construction of an object, which contributes to the optimal exposure of the design indicators of the future construction. In this case, compliance with the exact parameters and dimensions according to the project plays a significant role. Since the construction in question is prefabricated, its implementation depends on the correct use of materials and the characteristics of the components used, as well as fasteners.
General information
The formwork pinch screw is a part that bears the main load generated by the pressure generated by the load after being placed in the concrete solution. For these reasons, increased requirements apply to such designs.
The overall formwork configuration depends on the strength of the middle and end elements. This part fastens the parts of the module, fixing them in the desired position. The formwork tie screw and plastic universal tie must meet certain specifications. Let's take a closer look at these features.
Formwork Coupling Screw
The part in question is also called a tie bolt or stud. The element serves to fix the shieldsformwork at the required distance between them. In this context, the length of the screw determines the thickness index of the cast structure. After fixing the shields, they become stable and do not deform under the load from pouring concrete.
In Yekaterinburg, the formwork coupling screw must meet a number of mandatory requirements:
- Screw threads must be free of movement.
- The bolt is designed for increased tear resistance.
- The construction material must be resistant to corrosion processes, be equipped with a protective coating.
- To facilitate the subsequent dismantling of the formwork, the coupling screw is equipped with a protective tube made of polymers.
Standard Kit
The formwork tie screw includes a special stud with an outer thread diameter of 17mm. The length of the element is selected depending on the thickness of the formwork to be cast according to the project. As a rule, this indicator is from 0.5 to 3 meters.
Also included are a pair of galvanized nuts based on cast iron. Reliable fixation and a snug fit are provided by a wide flat area in the place where the nut is pressed. The part is mounted on the outside of the shield, it does not interact with the concrete solution. To increase the bearing area, use the washer supplied with the nut.
In order to choose the correct length of the coupling bolt, it is necessary to take into account the thickness of the cast structure anda similar indicator for formwork panels. The calculation is carried out according to the following scheme: the thickness of the proposed formwork is added up and the same indicator of shields is doubled (if two elements are used). 300 mm is added to the result obtained (the margin for tightening the nuts).
Plastic analogue
You can buy a coupling screw for plastic formwork in Moscow. The part is a pair of rods made of reinforced and elastic plastic (polycarbonate), used to fix removable or fixed formwork with parallel arrangement of panels. On the outside of the fixture, there is a thread for mounting mounting washers.
The rods are connected to each other by means of an effective lock called "groove-thorn". This configuration makes it possible to adjust the length of the tie according to the required parameters; the part is installed in special forms with a step of 50 mm. If the rods are insufficient in length, they can be extended by installing special extensions.
Features
The tie rod has a cross-sectional configuration that successfully resists compressive loads. This feature avoids the displacement of the walls inward. The provided special triangular ledges on a coupler give the chance to fix reinforcing bars. The device is very easy to install, no special tools are required for installation, a small mass facilitates the transportation of a large number of studs by hand, without being distracted once again from work.
Technical parameters
Coupling screw for formwork in Lipetsk can be ordered online. To make it easier to determine the type of fixtures, study the technical indicators of plastic systems for screeds:
- Available for use with various forms of formwork in virtually any material.
- The extension allows you to adjust the thickness of the processed structure from 300 to 600 mm.
- The system is highly tensile resistant and can withstand concrete pressure well.
Installation work
The main processes in monolithic construction consist of the following steps:
- The formwork is being mounted, which serves to indicate the configuration of future wall slabs.
- A reinforcing cage is made between the walls.
- Concrete mixture being poured.
- After hardening, the formwork panels are dismantled, if a non-removable type structure was used, they remain intact.
Formwork installation:
- Holes with a diameter of 22 mm are drilled in the shields.
- The hairpin is inserted from one side, a retainer, a polymer pipe section, and a second retainer are put on it. The tops of the stoppers must face the tube away from the panels.
- The clamping screw is brought out through the slot in the parallel board.
- Flat washers are mounted on both sides, nuts are screwed on while plugs are installed.
- To fix a pair of parallel walls without distortion, it is necessary to use notless than three tie rods.
Finally
When choosing tie bolts, pay attention to the quality of the products. The fasteners under consideration directly affect the strength of the formwork, so you should purchase kits that comply with GOST. The cost of structures depends not only on the quality index, but also on the material of manufacture, dimensions and the presence of an additional protective coating. It is extremely important to correctly select and install formwork with suitable tie rods, as they bear the brunt of the walls.
