During construction of cast-in-situ reinforced concrete structures the quality control shall be provided, first of all, for formwork and its bracing. Provision is made for the use of prefabricated reusable formwork (type “Doka”, “Peri”, etc.). It is required to check the correctness of layout of the structure axes, formwork geometrical dimensions and conformity with design dimensions. The diameters and dimensions of reinforcement bars as well as correctness of their placement and welding are also checked. Welded joints of reinforcement and embedded parts are performed as per GOST 14098-2014. Concrete preparation and pouring, quality of materials to be used, procedure for their acceptance and testing, transportation and storage are subject to inspection. All the above-mentioned shall comply with GOST for materials, SP 48.13330.2011 and detailed design drawings. Quality control of the concrete is carried out at the stage of its preparation and in ready state. Strength, frost resistance and watertightness of the concrete are checked.