17
3. The ceiling must can bear at least 120kgs weight, and the thickness of the ceiling
must be
≧
30MM, see pic 2, drill 1*170mm round hole in the ceiling.
4. According to the hanging board, drill 12 holes in the ceiling, see pic 2, 12pcs of
ST6*40mm big flat screws will be used to fix the hanging board on the ceiling, and
then 8pcs of M4*10 screws and M4 nut with gasket will be used to connect the
angle iron into the hanging board. See pic 1, calculated the length of the angle iron,
and 16pcs M4*10 big flat screws and M4 nut with gasket will be used to connect the
angle iron and another angle iron ( the overlap length of angle iron can not less
100MM)
5. Let the one side of the expansion pipe go outside through the hole of 170MM, see
pic 3.
