I posted my question because I couldn’t make sense of the tally on an Alder lumber I ordered. I was charged 11 BF for a pc 8/4 stock measuring 8 feet long and 7.25” wide.
I would expected this board to be come out at:
( 2 in x 7.25 in x 8 ft ) / 12 = 9.7 BF
Apparently, I have just learned, because the stock was kiln dried, there is a shrinkage factor applied to the nominal BF measure. In the case of my order it would seem somewhere around 10% was added to the tally to account for the shrinkage. Accordingly, the 9.7 BF measure was billed out to me at an even 11 BF.
This may be unique to stock expressed as X/4 but I'm not sure.
Alan I think your guy might have made a mistake OR it just happens on small orders they take it up to the next highest BF or round up the dollar value or something like that. check for a sign at the shop.
Your calc works out to 9.67bf actual or if if you think like a BF guy your order is 1.21% bigger than 8bf
7.25"/6"=1.21 rounded is 1.25 so 8BFx1.25 =10bf not 11bf could even be a typo
Where I but wood they always round off the the next inch in width to calculate BF. It can make a big difference. I bought some maple not long ago; when I eliminated the boards with quarter and half inches and replaced them with wider boards that had full inch widths I saved 50 bucks.
Last edited by Lost in the Woods; 06-07-2009 at 02:50 PM.