I have been told (Meaning I don't know if it is really true or not.) that in Colonial New England that birch dowels were used in the granite quarries to knock out big chunks of stone. The dowels were dried to as close to 0% moisture content as possible. Then these dowels were forced into the holes drilled in the granite. Finally water was allowed to permeate the birch dowels. The dowels would expand enough to break the granite loose. In winter time water was used for the same task and as it froze the result was the same.
TRUE and in the South it was used also in the hard limestone we have. IF I'm not mistaken , one elderly man told me dogwood wedges were the TOUGHEST!!!
You know, ive always heard the same anecdote and wondered just how true it is. In my head, theres no way that the wood would be capable of expanding with enough force to crack granite, we use dynamite for that for a reason. On the other hand, i dont know a thing about stone quarries
It WILL !!! LOL!!! I have a few stones in front of this house that have the hand drilled holes that they split by.
My question has always been kiln dried VS air dried lumber. Should you always buy kiln dried lumber or will air dried be okay. I have read that some woodworkers prefer air dried lumber. I have heard just about everything.
There's NOTHING wrong with either, nor even GREEN ....IF you know the proper techniques to apply with them.. the BIG SECRET.....there's NOT much to very little difference, IT'S ALL about proper joinery and knowing how/how much it's possibly going to move.
Dry is dry regardless of the method. I think the advantage to kiln drying is the much shorter timeframe for drying and that it kills off any fungi and critters. But 8% is 8%, at least in my book. YMMV...
LOL!!!! YES and NO!!! 8 is 8......NOT, it depends on how you get there!!!
.... dry is dry ....
there are exceptions. actually, in my experience most seem to be exceptions with a few non-exceptions.
suppliers who work in a big hurry dry it hot and quick in a kiln. they get the "surface moisture" content down (as measure by prong type instruments) or they get the "average moisture" down (as measured by destructive 'oven bake' weight methods.)
however the wood has not had time to reach the "dry state" in equilibrium. which shows up in the KD pretzel shapes one finds at the big box stores. basically the surface has been "over dried" to a depth of ? but the core wood beyond that is not dried to nearly the 'spec' -
it takes times for moisture to migrate through wood so that it reaches a stable moisture content throughout it's thickness. not every lowest cost supplier does that 'right'
BINGO!!! Pretty good quick explanation...LOL!!!!