Good info.

rfriend, I am not experienced with this but I do not think fumigating will work if the pieces are stickered so the fumes can get to all wood surfaces. If the pile is packed tight, heating the pile in place might work, you just need to keep the heat on for weeks and you do not want to introduce moisture. Somewhere I heard that a temperature of 190 degrees will kill the little buggers. De-humidification might work, slowly. Oiling the timbers would permanently change the color. An old farmers trick I have heard of is to "paint" the timbers with turpentine. I do not know if this would change the color permanently and the obvious fire danger. I knew that putting a coating like paint or varnish on wood keeps these beetles from being able to lay their eggs in the wood but something I learned from the above link to the pest control site is that the coating will also keep pesticides out of the wood!

Were did this frame come from? I rarely see any beech in Maine.

Highland, where are you?

good luck;
Jim