The 3.5 sched 40 for a slip fit is NOT going to happen,
unless I want to drop $142 for 20ft of it.
OK... let me spell out real clearly, what I am thinking of building here.
I am planning on building a 30ft gin tower With
one 20ft, 3"x3", 1/4" thick square structure pipe,
With one 12ft, 2.5"x2.5", 1/4" thick square structure pipe
(slid 1 OR 2 ft down inside the 3X3 and welded, making the 30ft mast)
With one 8ft Gin Pole made from 2.5"x2.5", 1/4 " thick square structure pipe
My base is 1200 pounds concrete with a 2x2ft, 1/2" steel plate
With two 4"x4" 5/16thick, 1.5ft long angle iron beams welded to it for the hinge.
If I am erecting this 30ft tower
weighing 288 pounds with an 8 ft gin pole weighing 57 pounds, (this includes a 7ft, 60pound turbine on the end) weighing a total of 344 pounds
how thick should my guy cables be?
I can bump up both square pipe sizes by .5 inchs wider, if you guys like...
but with the gin and the mast my weight will increase by 21 pounds (with turbine)
.
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