I would also use pine, fir, etc. You can stain or paint it to suit you. Here is a recent post of mine regarding ridge poles:
Loc: Mazomanie, Wis.
Registered on 04/08/03
06/11/08 05:50 PM - Post#579652
In response to mothernatureson
What I have done in the past is glue two 1 X 3s together, making sure the grain of one is opposite of the other. Just paint glue on both boards and then clamp/screw together about every 2 feet or so. This makes a very strong ridge pole. If you want an even stronger pole, you could use 1 X 4s the same way. Paint or varnish would be a good idea to protect the glue joint. You can also utilize shorter boards this way, staggering the joints on each side. Emery
I have also made upright poles the same way using two 1 X 2s for each; makes a very sturdy pole!