Large Tower Five section Leg Drawing.
This is the left section of the crank up tower, showing the leg tube stock. Note that the horizontal bracers (tower steps) start at at 15 inches and the 5th outer section has become 38 inches wide, center to center. Like wise it can be seen that the first section leg tube diameter is one inch, the filth section is over two and a half inches. It is surprisingly when using this model to note that the final section diameter, and section width, is dependant on the first section rotator plate size. Therefore there is a direct relationship from one section to the next.
The first section having to be strong enough to support a reasonable sized antenna system at 100 foot, sets the foundation for the next outer section, and ultimately the final section size. Design cannot be done from the outside to inside. An important factor is safety, in the above drawing it can be seen that the filth section leg tube has reached 2 inches. The load and weight that this section supports is enormous, and the tube wall becomes very thick and heavy.