The wind pressure distributions were analyzed to provide fundamental criteria for the structural design on the two-span arched house according to the wind directions through the wind tunnel experiment. In order to investigate the wind force distributions, the variation of the wind force coefficients, the mean wind force coefficients, the drag force coefficients and the lift force coefficients were estimated using the experimental data. The results obtained are as follows : 1. The variation of the wind force with wind directions on the side walls was the greatest at the upwind edge of the walls. 2. The maximum negative wind force along the length of the roof appeared at the upwind edge at the wind direction of 60˚. 3. The maximum negative wind force along the width of the roof appeared at the width ratio and wind direction of 0˚ and 0.4 in the first house and 0.6 and 30˚ in the second house, respectively. 4. The mean negative wind force on the side walls of the first house at the wind direction of 0˚ was far greater than that of the second house, and the maximum negative wind force on the roof occurred at the wind direction of 30˚. 5. The maximum lift force appeared on the second house at the wind direction of 30˚, but the lift force on the first house was far greater than that on the second house at the wind direction of 0˚. 6. The parts to be considered for the local wind forces were the edges of the walls, and the edges of the x-direction and the width ratio, 0.4 of the y-direction in the roofs.

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