Conformity Certificate No. RU.MCC.305.1020.4.ПР.22549 dd. April 19^th, 2011, issued by certification body «Mosekspertstroysertifikatsiya» for rolled product manufacturing, thermomechanically treated profile with half-moon shaped cross ribs of A500C class production (diam. 8 mm-25 mm, 28 mm-40 mm) of Ст4пс, Ст4сп steel grades, meant for concrete structures reinforcement, in conformity with STO ASChM 7-93 requirements.