I'm not really qualified to comment, but my gut tells me that PVC does not have the rigidity or strength to serve as a direct substitution to a wood or aluminum plan... I'm guessing that it would also be pretty heavy.

: Hi, I was thinking of trying a PVC pipe scin-on-frame. I've heard people
: mention it here and elsewhere, but I don't hear much details. It seems a
: pretty streightforward substitution, but then again, I havn't tried it
: yet.
: Just wondering if there were some things to look out for, and if the frame
: requires additonal modification, etc.
: Thnaks for anything you can tell me,

: Tyler