All you need to know about the formwork for fences

Reliable fence needs the foundation. Poured it into a special framework (formwork), which gives the right form. What kind of formworks are, how to collect them correctly and dismantle after the soar of the concrete, let’s talk in our article.

What is it and necessary?

After the construction of the house on the site it is necessary to build a fence. The ribbon foundation for which the formwork is manufactured, suggests a sufficiently powerful fencing of the territory with brick columns or concrete blocks. For the fence from the corrugated floor, too massive foundation is not needed. The power of the base is determined by the load that she will have to withstand.

Formwork is used for any belt foundation, in our case – for the construction of the fence. So that the structure was durable and did not fall from the busting of the wind, it is installed on a concrete basis. For mounting the foundation, trench is digging along the line of the fence.

The concrete flooded without a frame will begin to get absorbed into the soil and take the wrong shape. Therefore, the trench establishes a formwork that can keep the cement mixture in its borders.

Frames made of boards or wooden shields. Thin options can be deformed under the pressure of concrete. To avoid this, choose durable products or replace wood with other types of materials. The formwork is removed by 25-30 cm above the ground. The foundation is raised to this level to avoid the impact of the soil directly on the material from which the fence was made. Tree in places of connection with the ground rotates, iron corrosive. Speaking over the soil foundation looks aesthetically more pleasant than a squat version.

The following requirements are presented to formwork.

  • The presence of smooth corners.
  • Walls must be without deformation and deflection.
  • Material must have sufficient rigidity to be guaranteed to hold concrete without disturbing formwork.
  • Dismantling the frame should not create problems.

Properly executed design – warranty of high-quality foundation and reliable fence.

Description of species

The formwork is asked when there is a need to fill the monolithic concrete. It happens different types.

  • Horizontal. Used to build a widespread foundation with concrete slabs. Inside the design is installed metallic reinforcement.

  • Vertical. Apply for pillars, non-standard buildings, narrow fences.

  • Inclined or architectural. Mounted for a fence with a unique design.

In addition, formworks are separated by the method of their assembly for another two species – removable and stationary.

Removable

This type of design is sacrificed after grazing the concrete and is transferred to the next part of the fence or is used several times for other buildings. Due to the removable design, perfectly smooth surfaces of the foundation are created. High-quality formwork should be easy to disassemble the expenditures of the erected base.

Non-removable

Stationary formwork does not understand, it remains part of the foundation design. Performs an additional protective function, and with the right choice also aesthetic.

Full designs cost cheaper removable, so more in demand.

Materials used

The walls of the formwork must withstand the resistance of concrete and prevent the deformation of the entire bay design. For these purposes, the following types of artificial and natural materials are chosen.

  • Wood. The formwork, isolated from wooden boards, belongs to traditional types of structures that our ancestors used. The board is selected inexpensive, but durable, such as pine or spruce. For collapsible formwork, you can use old spent material.

  • Metal. Used in the form of sheets with a thickness of 2 mm in cases where the foundation needs to give a rounded form. The material is durable, reliable, has good insulation properties. For the formwork structure, it is rarely used because of the high cost of metal.

  • Slate. To form a box under the bay of the cement mixture, a flat slate is used. It does not bend, it has enough strength to withstand the pressure of the concrete of small volumes. But in the case of large-scale fill, the wall walls can crack.

  • Polystyrene foam plates. Have a light weight that allows you to quickly collect them in the overall design. Formwork do not disassemble after biting concrete. It not only attaches the base of the fence perfectly smooth shape, but is a good waterproofing protection.

  • Reinforced concrete. The material has its own stiffness and adds the strength of the fuel composition. Due to reinforced concrete elements, cement saving occurs.

  • Plywood. To create a formwork to hold the wet concrete, only thick sheets of plywoods of coniferous trees are applied. Better if they are laminated. Plywood shields are comfortable in assembly, but do not sleep.

  • Chipboard. To level the processes of swelling from moisture, laminated sheets are used for design. The formwork is going and dismantled quickly, but the chipboard is not considered a successful choice due to instability for dampness.

The above list contains the main material. Besides him, for the construction of the frame will be needed fittings and bars as spacers.

They will help to hold pillars in a vertical position. So that the workflow is constantly not interrupted in search of instruments, they should be prepared in advance. To build formwork, you will need:

  • Measuring instruments – roulette and level;
  • Rope and pegs for marking on the ground;
  • Tamming for drainage seals;
  • Bulgarian, screwdriver;
  • self-tapping screws and nails;
  • Shovel, hammer.

Training

To install the formwork, it is not necessary to attract specialists. If there is time and desire, installation can be made independently. Before starting construction, the site should be examined on which the fence will rise. During the inspection, stumps, depressions, communication systems, height differences can be found. All that may need to eliminate. In difficult situations, you will have to adjust the construction of the construction of the obstacle.

When the place to install the fence is prepared, it is necessary to figure out its size to calculate the amount of material required for the construction of the formwork. At the next stage, with the help of ropes and pegs, markup is made around the perimeter of the future fence. It is important to measure the corners correctly, take into account the location and the length of the gate. Before digging the trench, the top layer of soil is removed.

The trench is digging with strict observance of the marking lines, the bottom is thoroughly aligned.

The size of the deepening must be more alleged norms. For width, the stock is necessary to set the bars holding the walls of the formwork. And the depth must comply with the parameters and pillows of sand, gravel and rubble.

Drainage will not only solve the problem with the outflow of water, but will be a support for the base of the formwork, will give it stability. After the layer of sand layer it is necessary to pour water and tamper, then lay a broken brick, gravel or crushed stone and again and again, well, aligning the bottom of the trench. Dimensions of recesses may have parameters from 30 to 80 cm deep and from 70 to 100 cm in width.

Stages of construction with their own hands

When preparatory work is completed, you can start building a formwork.

Mounting design

The following steps are made to fill the trench tape frame.

  • If the design is built out of bars and boards, they are treated with technical oil or tar, creating a waterproofing layer.
  • On the entire perimeter of the trench on both sides, the sections of 50×50 mm are driven by section. Step between them is kept the same. Depending on the width of the ditch, the distance is selected from 80 to 130 cm. The height of the BRUSEV should be higher than the future wall formwork.
  • Shields or boards are attached to the standards. To simplify dismantling the nails hats must be on the outside of the design. If the concrete is completely poured, the formwork is done whole. But you can divide it into sections of 4-8 meters.
  • From the outside, the formwork is strengthened by bodies (bruises with one-sided beam). One side they are nailed to the middle of the shield, and the other – rest in the ground.
  • Ready design reinforce with reinforcement or wire.
  • The ends of vertically installed stakes are combined with horizontal bars among themselves to strengthen the entire design and do not let her break under the onslaught of concrete.
  • Metal brackets should be put on the corners.
  • When everything is ready, carefully close the slots to prevent concrete spreading.
  • Inside the design, polyethylene is laid, providing a waterproofing layer.

Pouring concrete

Do not make a solution too liquid. Concrete is prepared at the rate of 250 ml of water per kilogram of dry mixture. Excess moisture after driationing can create emptiness in the foundation cavity. The lack of her will also affect the final quality of work. Other dry supplements for cement, which absorb water. For example, when they are injected into the composition, add to it and liquid (4: 1).

Poured concrete quickly, in full. If you have to share it on a portion, the bay time should be minimized.In addition, it will have to mix the mixture with a construction mixer for density and to avoid air bubbles. After pouring the concrete, the foundation surface should be thoroughly aligned to create a uniform load on the soil.

With a smooth surface, further construction work will be held without problems.

Dismantling formwork

When the concrete design is completely frozen, it is necessary to free it from the restraining frame. Work performed carefully, slowly, not to damage the surface of the foundation. Sometimes dismantling can stretch for several weeks. But the work on the construction of the fence can be continued, because the concrete is sufficiently reduced and has a marker strength. Performing platforms are made in compliance with the following steps.

  1. Begin to dismantle the design from above, where the concrete is grabbed faster. Clean the edges and angular fasteners.
  2. Shields and racks disassemble easy. But you need to show accuracy to remove the material without damage. It can be reused.
  3. At the last stage, the support beams are dismantled, which gets the maximum load on the hold of the foundation.

If the dismantle was successful, the appearance of the foundation will be impeccable, and the shields removed will be useful for the following works.

Useful recommendations

      Those who first faced work on the construction of formwork and the fill of the foundation can take advantage of the advice of professional builders.

      • OSP – the most successful option as shields for formwork. They have good strength, flexibility, they are easy to cut on the necessary details. It is worth the material is inexpensive.
      • It should not be carried out in hot weather, it will lead to a rapid evaporation of moisture from concrete. If you do not exit, you can use sawdust, cover them unprotected surfaces.
      • Mounting formwork, it is necessary to monitor so that there are no gaps between the trenches and the bottom.
      • In places of compounds of shields with pillars, shields should remain inside the structure, and the posts are outside.
      • Fixation by self-drawing is performed at an angle of 45 degrees.
      • Do not leave sticking nails inside the design, it will complicate her disassembly after grazing concrete.
      • Do not disrupt the stage of work or hurry, because you need to make a high-quality formwork, the fortress, reliability and appearance of the foundation depend on it.
      • If a non-removable device is used, at the end of the work, it is necessary to put the base part of the fence. May be needed decorative facing with brick, stone or tile.

      Removable formwork costs more, but it can be used several times. Cheap stationary design requires refinement, have to spend money on facing material.

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