Mmmm... 14m long douglas fir beams. I think the sawmill owner would have an aneurism if I asked for that! :-)

Living on the east coast of the US with small trees, in comparison to the west coast and its doug fir, it is very possible to find 46' timber, this sawmill owner would find it a great pleasure to saw such plates. Just running it up the flag pole as a possibility. Perhaps in your part of the world this is not an option. Scarves are something to avoid, if possible. Sorry, for running on.