Hi I think the foam plugs do more harm than protection. Better to do some vent holes or gaps at the ends of the column to dry out the moisture condensation from inside of columns.
Ark. 2014-05-02 18:47 GMT+03:00 <mwfos...@earthlink.net>: > Don, > > Wow - very informative write-up. Yes, I am very interested in seeing a > SketchUp model. Can you show where you place the plugs (temporarily I > assume - until you move them to the ends to mount the assembly onto mill. > Can you also explain when and how you fill cavity with foam? > > Thank you for sharing your experience & wisdom. > > Thanks again. > > Mac > > > ----------------------------------------------------------------------------------------------- > > -----Original Message----- > From: Don Butler > Sent: May 2, 2014 9:54 AM > To: legacy-ornamental-mills@googlegroups.com > Subject: outdoor hollow columns > > In my practice with the LOM I have built a few outdoor columns. The > peculiar problems come with the harsher conditions outdoor woodwork has to > endure. > A solid column may crack due to the outside material shrinking much faster > than the core. I see 4x4 posts cracked like that all the time. To head > that > problem off I make hollow columns. > Now getting the workpiece ready for the mill presents considerable > difficulty but is well worth the effort. Tight, strong joinery is > essential > as is using a weatherproof glue. The one I use is Titebond III. There are > others, I haven't tried them. > The joinery I employ is to cut birdsmouths on the long edges of the boards. > To clarify: for a six sided figure the edge cuts are 30º and 60º on one > edge and the other edge is 90º. > A good way to achieve the glue up is the make 2 six sided plywood plugs to > go inside (They will be needed later anyway to mount the work in the mill) > and two stands shaped to hold the pieces from the outside. The first three > pieces are glued up and then the other ones are fit after the glue sets. > If anybody is interested I'll make up a SketchUp model and post some > drawings. > Best regards. > Don > > -- > You received this message because you are subscribed to the Google Groups > "Legacy Ornamental Mills" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to legacy-ornamental-mills+unsubscr...@googlegroups.com. > To post to this group, send email to > legacy-ornamental-mills@googlegroups.com. > Visit this group at http://groups.google.com/group/legacy-ornamental-mills > . > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Legacy Ornamental Mills" group. To unsubscribe from this group and stop receiving emails from it, send an email to legacy-ornamental-mills+unsubscr...@googlegroups.com. To post to this group, send email to legacy-ornamental-mills@googlegroups.com. Visit this group at http://groups.google.com/group/legacy-ornamental-mills. For more options, visit https://groups.google.com/d/optout.
