| Summary: | The basic requierement for ensuring of geometrical accuracy is knowledge of all requierements on accuracy of geometrical parameters on finished construction. It makes safe function of construction from the point of view safeness, durability and reliability. It is necessary to know the selected functional geometrical parameters (parameters operate about functional qualification construction) and their limiting deviations. The limiting deviations of geometrical parameters are prescribed at the technical documentations, projection documentations etc. If these limiting deviations of buildings are unavailable or much free (both of the cases are uneconomic), it should take account of the technological quality building process and use empirically determinated tolerance extends, which reply for technological possibility of construction. Otherwise carried out study of the capability building process, so-called check of statistical stability building process. The subject of this paper is solving of empirically determinating of the tolerance extends which may be neither parametrical extend for file which has normal division of watch sign or non-parametrical extend which has not normal division of watch sign.
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