Four. Placing a drop of skill work and stacked into this. Several layers. To check if all ties to the new emigrants. Beam to prevent falling. Fell from shelves.
4. placement of a piece of work and the success of "sakit stacking several layers of wood, examine every pillow. If the corrosion is found to protect b drop shelf from the malom.
4. To place a piece fell from the กิ๊ด overlap and Unproductive Workload. Number of railroad ties, check every piece of multi-storey ruined if it is found to change new to prevent beam fell down from the second floor stand