There are some streaks of discoloration in the timbers that I hope to use for my keel and other backbone members. The streaks are a lighter color than the surrounding wood. They almost look like the sapwood but are much too near the heart. They start as low as ring 24 of about 80 and good colored heartwood is both above and below them.
What is this and do I need to avoid putting it in my keel? Is it possible that sapwood formed but never matured into heartwood? If that happened could it then grow heartwood over top in an alternating pattern?
This was taken after a fresh coat of linseed oil. Before oiling it was not near as obvious. I would very much like to use this part of the beam for my keel but I wont if those light colored streaks do not have the normal rot resistance.
The bottom of the beam in this picture was pretty much the center of the tree and the top was milled to be free from sapwood. The wood in the log extended another several inches above the top of this beam but I cut it off to get rid of the sapwood.
Do any of the resident wood experts have a strong opinion one way or another about whether this wood is acceptable?