When finishing installing the first two arches, connect the Connection purlins onto them by using
screw M10x90
（
part code 10
）
.There are 5 pieces of Connection purlins (part code 4)
between two groups. Then install the third arch into base plate and connect the purlins. Finally
install the Support tube (part code 5) using Screw M8x60
（
part code10A
）
and Clip (part code 6).
By turns the assembly for the frame is finished.
