Might want to take a look at the date of this thread...the OP hasn't logged in 5 years, so I doubt he's going to see this.Medic 9204,
You can substitute spruce with Douglas Fir (Oregon Pine) .I have made various experiments with spruce and pine and every time the pine was slightly stronger and the the grain run-out was superior. You could follow a grain line in an 1" square (planed) by 8 ft. piece from end to end. Colour vary from light cream to a reddish brown. I found the darker the colour, the stronger and slightly heavier the piece. Get some and do your own experiments
Another example of you making up your rubbish just to have something to post Steve -Kierie has been bumping several ancient threads.
That's all very well if the spruce is available. In Oz I don't think we have any grown here but we do have very high grade WRC, so if that was comparable why would you go to all the trouble of importing spruce? And that's quite apart from all the rigmarole involved in importing anything organic into Oz due to pest/disease control regulations.Just go with certified spruce for cryin out loud and be done with it...if it's that much more expensive for ya, then ya shouldn't even be fooling around with getting yourself more than 6 feet off the ground