Summary. In the present paper, a detailed analysis and interpretation of He-like resonance-line satellites radiated from Be-like ions is made for spectra of Mg, Al, Ti, V, Cr and Fe. Corresponding X-ray spectra were recorded in radiation from laser plasmas produced by both Nd- and CO2 -lasers. The theoretical results (wavelengths, radiative probabilities and autoionization rates) have been calculated using the method of relativistic Z-expansion for Z = 12-30. Good agreement between theoretical and experimental results is obtained.