|Forum topic by DickB||posted 09-05-2014 12:24 AM||608 views||0 times favorited||5 replies|
09-05-2014 12:24 AM
I’ve made several of these large lake maps, about 2ft x 4ft, using select pine and have had no issues. The main panel is made from two 12” boards edge glued, and the frame typically 1×4, mitered joints held together with biscuits, with a routed slot in which the panel floats.
I made a larger one, about 3ft x 5 ft, and the project has warped. The 1×4 frame has not been sufficient to control warpage in this case.
I’m thinking I need to build a honeycomb-like subframe to be installed behind the project, not hexagonal but rectangular or square – maybe 8” squares? – out of 3/4” Baltic birch. The subframe would be hidden, but hopefully provide the necessary stiffness to prevent future warpage. (hopefully I have described this well enough to be understood.)
Any comments or suggestions?
-- Dick, http://www.carveshop.com