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width of irregularly-shaped lumber for BF calculation2/26
What is the correct way to measure the width of an oddly-shaped board, as a basis for board-foot calculations? See attached photo.
Think, I'd sell by the piece. not BF...my 2¢
I normally sell by the slab due to each has different characteristics that change the value "per board foot".....BUT when it is necessary for customer specs to do B.F. and I've seen this as a common standard with live edge is measure from the wide side...IF they're fairly consistant in change we'll measure 3 spots (ex both ends and center and divide by 3 = average W) ...on extreme changing as yours shows I measure every 1 ft including starting end and divide accordingly...this is more accurate. DON'T forget the thickness and length in calculations. Yes they pay for the taper loss OR as I look at it the pay for the beautiful edge!!!
Thanks! That answers my question.
I also would sell by the piece and not the footage.
From a technical point of view, the NHLA Rules require that a piece of lumber be "well manufactured" which this slab is not...that is, it is not a piece of lumber, but is an unedged slab. So, the standard rules do not apply.
You could lay out a piece of lumber with some wane that you could make from this crooked piece and then say something like "potential of making xx BF of lumber."
Because lumber is assumed to have parallel sides most of the time, if there is taper to the piece, then the width is measured at a spot 1/3 the length from the narrow end rather than using an average width. This "penalty" is a good compromise solution.
For pieces with wane, the width does include the wane.