Connect the two struts together with the
coupler, and secure the connection with two
zip ties that are inserted through the holes in
the sides of the struts..
After the dome is complete, check the width
of the dome to make sure it is correct, and
that it matches the width stated in the
Assembly Manual or on the Tunnel Dome
Calculator.
Tunnel Domes have a tendency to spread
out in the middle, and pulling the sides
together will make the Tunnel Dome much,
much stronger.