Here's a look of a piece of tower

A tower section is 6m long
The vertical angles are 24mmx5mm
the diagonal angles are 18mmx2.5mm
Tower side is 22cm
Bolts are 6mm


Here's a close-up
The complete 6m section has 240 bolts






use a fishing line to keep the
angles in a straight line


first build 2 sides then join them




The full tower is first assembled on the ground...


then  the whole 18 meter tower is raised up with the help of a winch...