FIELD: building industry, particularly foundation construction for building frame columns. SUBSTANCE: foundation includes stepped plate of horizontal base, vertical support located on stepped plate, side plates supported by plate steps and connected with vertical support by hinges and inclined cross-bars. All above members are arranged into foundation trench. Inclined cross-bars are formed as at least two sections pivotally or telescopically connected to each other. Side plates extend at an angle and pivotally fixed in upper step parts. Inclination angle of side plates corresponds to that of side walls of trench with undisturbed soil structure. EFFECT: increased foundation load-carrying capacity and operational reliability. 2 dwg
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