It has to be installed on the beam that will be used for supporting floor’s weight. While casting beam, it is necessary to fill concrete for adjusting its level to be placed closely with beam evenly. Subsequently, PCM plank can be installed easily. To improve supporting of the plank or in the event that SPAN is longer than 3.00 meters, there should be the temporal skids for supporting at the half of the length of each plank. In addition, these skids are also able to be used for adjusting all planks to be even during concrete topping.