Adjusting pole diameters

[Finalyrproject]

What is the fastest way to increase all of of the diameters of metal poles in my structure? Is there a way to connect the circles in the sketch to the bodies?

Also, sometimes the image shows the poles extruding the base pole but when I zoom in this isn’t the case, is that an issue?

[SM1]

I’m assuming you want to adjust the horizontal pipes. You can do so like this:

Go into top view, and area select so you only select the faces of the pipes:

Then you can adjust all of them at once.