Installation of stacked foundation blocks and their elements in the plan should be made relative to the center axes in two mutually perpendicular directions, combining the axial risks of the foundations with the landmarks fixed on the base, or controlling the correctness of the installation with geodetic instruments.
The installation of blocks of strip foundations and basement walls should be performed starting with the installation of lighthouse blocks in the corners of the building and at the intersection of the axes. The lighthouse units are installed, combining their axial risks with the risks of center axes, in two mutually perpendicular directions. After the alignment of the position of the lighthouse blocks in the plan and in height, one should proceed to the installation of ordinary blocks.
Foundation blocks should be installed on a layer of sand aligned to the design mark. The maximum deviation of the level of the leveling layer of sand from the design should not exceed minus 15 mm.
Installation of foundation blocks on water or snow covered foundations is not allowed.
Foundation glasses and support surfaces must be protected from contamination.
Installation of basement wall blocks should be carried out in compliance with the dressing. Ordinary blocks should be installed, orienting the bottom of the trimming blocks of the lower row, the top - on the center axis. Blocks of external walls that are installed below the ground level should be aligned on the inside of the wall, and above on the outside. Vertical and horizontal seams between the blocks should be filled with mortar and embroidered on both sides.
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