The desire was to make a BIG lighted Christmas tree to celebrate the holiday season. So after Christmas last year, we went to Walmart and bought up all the lights that were on super SALE. I think that we paid about 1.99 a piece for the lights. And then they sat in the basement for about 11 and 1/2 months.....
Step 1: Some trig
The lighted section of the lights was 23 feet. So that was the hypotenuse of the triangle. I figured the angle of the tree would be about 70 degrees, so I did some math to see what the other sides would be. With the angles, the center of the tree should be about 21 feet 7 inches. So I built the center of the tree with 6 2X4 studs 8 feet long.
I laid them out 8 8 8 and then backed them with 4 8 8 4 as you can see in the drawing. Initially I put them back to back, but they were too wobbly, so i put them together in a "T".
I added two 1x4 sections with a "U" cut out in the top to lay the lights in. See photo. This created two "valleys" for the light strings to go through.
When I had the 24 foot pole put together, i dug about a 3 foot hole, and put the pole in it.