A. I do not know of any practical technique for measuring the core MC except for the pin meter or the destructive oven-drying tests. Note that you can use nails instead of pins with the meter and you will get the wettest MC along the length of the pin.
If you are concerned about the needle holes, you might try putting a few drops of water in the hole after you withdraw the needles. As you squished the fibers when you drove the pins, the water will cause the squished fibers to swell back to their original shape and fill the hole almost perfectly.
Q: We are having a problem with shrinkage. We make furniture, but someone else sells and delivers it. This person claims he did everything correctly, including opening the furniture wrapping (we wrapped the furniture with shrink-wrap and it was fairly well sealed) and letting it acclimate to the house climate. When the customer moved in, they said the furniture looked really wonderful, but within a week, it started to warp, open joints and crack in a few places. We are so careful to keep our plant at 40 percent RH and check the MC of the lumber. This is frustrating! Can you help?
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