Re: The Helix

Posted by Geoff Hamway on
URL: http://c-sng-discussion-forum.254.s1.nabble.com/The-Helix-tp9915p9978.html

Jim,

Rather than trying to cut special joints in your 1/2" plywood arcs, you might consider laminating 1/4" arcs with staggered joints.  More work to cut and assemble (twice as much woodworking fun!), but eliminating the 1/2" splice plate would reduce the grade considerably.  I've also experimented with steel Strong-ties (Home Depot) to splice plywood sections in some places, with good results.  Caveat:  I haven't used the plates where there's a vertical curve or into less than 3/4" plywood, but that's not to say they wouldn't work.

You might also reconsider the 1/2" homasote -- I think the 1/8" stuff (actually 3.5 mm) is plenty, but there are those who don't use any in their helix and don't miss it.  I expect that my resulting grade will be back in the 2.1% range, which should allow my little consolidations to pull a caboose AND a freight car or two to the top!  

Geoff