Then it is required to concrete the site. Previously, a pillow of sand is laid on the bottom. The base is made with a thickness of about 20 cm. Concrete the bottom, it is necessary to provide a slope towards the opening of the drain. It is done in laying at the bottom level, and then closed with a traffic jam. After pouring the bottom, they start laying the wall. The brick needs to be shed into the solution so that the several lower rows are immersed in concrete. For reinforcing rows, metal rods or mesh are used.
A slope towards the
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