20MANUAL DE USUARIO PARA TORRES FT. / USER MANUAL FOR FT TOWERSDegree of compaction load.Hard surfaces such as dirt or gravel may vary depending on the resistance relative humidity. This relative humidityvaries over the day, so that the resistance of the soil to absorb tower effort loaded, too. Place a tower under theseconditions may result in the ground yield below the supports of the tower. Causing a serious accident.Figure 44Detail of plates place. Support must be centered with respect to the plate.To avoid this, it is advisable to put bases in the support, to facilitate uniform distribution on the ground. Expandingthe contact surface of each support. The following table lists the minimum area of these surfaces.TOWER MODELSide length of the plate in meters, and kg/m2 that cansupport the ground.150 Kg/m2 250 Kg/m2 350 Kg/m2T600PA 1.2 0.9 0.8T108PA 1 0.8 0.6T200PA 0.8 0.6 0.5T117PA 0.8 0.6 0.5T118PA 0.8 0.6 0.5Figure 45