The primary purpose of the present work was to understand the characteristics of wind force correlations and quasi-static wind load combinations of a target model in a large group. Fluctuating pressures were integrated over the surfaces, and along-wind force, across-wind force, uplift force, along-wind overturning moment, across-wind overturning moment and torsional moment were obtained and used in the analyses. Firstly, the characteristics of wind force correlations, including the ratio of force coefficients, phase-plane expression and cross-correlation coefficients, were investigated for an isolated model and for a target model in a large group. Then, peak normal stresses in columns of a simple frame model were examined to check the wind load combination effects. Lastly, a shielding factor of a combination factor was proposed in the form of an exponential function.