Am I on the board directly on the tapping screw, or do I plug the expansion tube first? Which is stronger?
Therefore, it is not appropriate to use expansion bolts or expansion tubes on the boards.
Wood is soft, if it is a 5~6 cm wide strips, even if it is installed in the middle position, the expansion piece of wood split up will bolt, there is no effect, even in the relatively large width of wood.
Direct tapping screws should be used. It is not scientific to use expansion bolts on the boards. Installation of expansion bolts or plastic expansion pipes requires a relatively hard foundation (strength), such as the installation of cement on the basis that the strength of the cement foundation is within the normal range;
