Optional: Stain them for a darker wood.
Next, you'll need to clean all of your steel pipe and fittings. My dad gave me this stuff- LPS Electro Contact cleaner but I think you can just use a warm, soapy rag to clean off all the gunk.
Now it's time to put all the pieces together. My dad did this part for me (he kind of took over) but what you do is grab some wrenches and just tighten this stuff together as much as you can. Start off with the top piece and attach the tees. Then the side pieces, the nipples and caps. And last, the floor flanges.
Then, measure out your top (from middle of one tee to the next) and screw floor flanges onto base accordingly.
Done! Here are some close up shots (: