The height of the gym should be at least * * 3.7 ~ 4m * *, with a clear height of about 4m, which is conducive to ventilation and exercise. In addition, the column spacing of the gym should not be less than 7 meters to ensure the sense of space and visual effect. At the same time, the floor load of the gym should be between * * 300kg/m2 and * * 350kg/m2 to ensure the bearing capacity.