How to handle between two different levels of aluminum slabs
The main keel above the top with a screw hanging on the roof, but also at least stay 1-2 cm height, that is, at least you the height of the board and the roof to stay 7CM or so, and this is still you do not install Yuba Circumstances, if you want to install Yuba, it would be 10 centimeters.
First ceiling to the dragon skeleton, the above is the main keel, the main keel hanging under the board of the vice keel, the main keel plus vice keel total of at least 5CM height space
