Currently, in the private construction, purchased concrete slabs used as lintels are practically not used. Today, most suburban housing owners prefer to make door and window lintels with their own hands.
For self-construction of bulk concrete bridges, you do not need special skills at all. All that is required of you is to pay due attention to the materials of this article and follow all the instructions given in it.
Boards for making formwork
For the successful implementation of the delivered The tasks you will need are the following consumables:
Jigsaw for cutting wood
As for the tool, you will need to work prepare:
Arrangements for lintel begin with the manufacture of wooden frame (box), used for pouring concrete mix and obtaining a building element of a given shape. To install such a box, you will need one lower and two side wooden shields, from which you can later assemble the formwork.
The linear dimensions of the finished panels should correspond to the dimensions of the window opening, and the side panels should cover it both in height and in width. The lower shield is made exactly according to the size of the opening being closed. In the sides of the formwork, pre-prepared openings for the knitting wire, by means of which the shields will be held in a given position. The bottom and side surfaces of the boards are then laid with a plastic film, which is attached to the formwork with glass nails.
Fitting of fittings
It is best to use concrete mixed with fine gravel to fill improvised jumpers.
Filling window jumper
Concrete casting operations are recommended to be performed together; while the assistant will be able to serve you with a bucket of concrete, which is usually prepared at ground or floor level. Concrete should be poured very carefully, making sure that the composition is evenly distributed throughout the volume of the box and penetrated into all its cavities. In addition, when arranging the window jumpers with their own hands (in the process of leveling the concrete mix), it is necessary to ensure that the fill level coincides with the upper cut of the brickwork.
The dismantling of the formwork usually begins with the cutting of the knitting wire, after which it will be possible to proceed to the unscrewing of the self-tapping screws fastening the shields together.Then by mounting the side shields are separated from the finished lintel, after which the support is removed and the lower shield is removed.
The surface of the resulting jumper often looks not quite perfect and, of course, needs in additional processing. To do this, first remove the remnants of the wire, and then in order to remove all irregularities, plaster its surface.
About the pouring of reinforced concrete jumpers in practice, see the following video:
Setting the jumper using U-blocks
Production scheme of a monolithic jumper
Reinforcement framework for the window lintel
Jumper after pouring concrete