09-29-2009, 07:06 AM
1x5 (actually 3/4 x 4 1/2) select pine, or 3/4" cabinet grade (i.e. lots of layers) plywood ripped to a minimum of 4" is what we recommend for module construction at <!-- w --><a class="postlink" href="http://www.hotrak.ca">www.hotrak.ca</a><!-- w -->. We also have provisions for joining modules with bolts and T-nuts, so I'd say you are definitely on the right track! 
Andrew

Andrew
