Such a building structure is used in cases where the foundation of the structure( aboveground part of it) is made of solidifying material( for example, concrete mortar).Since it is visible, higher demands are placed on its surface. Therefore, the evener the inner side of the formwork is, the less effort will be required to finish the foundation.
In order to make the formwork for the foundation, metal or wood( boards, plywood sheets) is traditionally used. A new kind of such "fencing" is a fixed structure made of expanded polystyrene. You can purchase ready-made metal parts, from which the formwork is assembled. But still in most cases in the individual construction of wood is used."Private traders", as a rule, make the foundation of the belt type, therefore the formwork is constructed detachable.
Sequence of operations for
formwork
pad is being prepared. In the trench area, it is necessary to remove all construction debris and to maximize the ground level. This is necessary for a more even installation of the formwork.
Manufacture of
boards. The bars with which the boards will be fused into one, it is better to sharpen at one end. Then they will effortlessly enter the ground. The recommended distance between them is about 1 m. But if the boards are thin, then the bars should be placed more often. The length of the bars is chosen from such a calculation, so that after the installation of the shields in place they hold fast. And shoot down the boards so that the hats of the nails( screws) are on the inside of the formwork.
Installing the shields in place( along the trench)
If they are located, parallelism must be observed. You can use a regular plumb bob for this.
Bracing of panels with each other
This gives the whole structure rigidity and provides quality formwork. After all, the boards will have to withstand a large load when pouring the solution( you can read how much to prepare for the foundation), and they can "part".With the help of bars boards of shields from opposite sides of the trench are fastened together. At the same time, the distance between shields is controlled.
In addition to holding the boards in a fixed position, they are "pinned" with struts( struts).The edge of the strut, which rests against the ground, must be securely fixed( for example, a peg), so that the hanger does not "go."
To reduce the cost of work, boards of the second grade are used. Therefore, it is better to put the inner part of the formwork with roofing material. Even the gaps between the boards will not worsen the quality of the future foundation.
This is the simplest version of the formwork, used in small construction, and is available to every novice homeowner.
