Computerized technique for recording board defect data

Abstract

A computerized technique for recordihg board defect data has been developed that is faster and more accurate than manual techniques. The lumber database generated by this technique is necessary input to computer simulation models that estimate potential cutting yields from various lumber brt-dakdown sequences. The technique provides detailed information on the location and type of defects.

1998 data bank for kiln-dried red oak lumber

“…In this later sampling, we emphasized FAS, F1F, and Selects along with 3.5-to 5-inchwide boards in the Selects and lower grades. /3 2 75 1 2 and 3 50 3 and 4 66-2/3 1 4 and 5 50 5 to 7 66-2/3 2 6 and 7 50 8 to 10 66-2/3 3 8 and 9 50 11 to 13 66-2/3 4 10 and 11 50 14 and up 66-2/3 5 12 and 13 50 14 and up 50 3 to 10 feet surface measure will admit one 2 to 7 feet surface measure will admit one additional cutting to yield 75% clear face additional cutting to yield 66-2/3 percent clear face a From "Rules for the Measurement & Inspection of Hardwood & Cypress," 1990, National Hardwood Lumber Association, Memphis, TN. Data encoding procedures as described by Anderson et al (1993) were used to record the types (Table 3) and positions of all defects on both faces of each board. The lower left and upper right hand corners of the smallest rectangle containing each defect were recorded to an accuracy of 1/4 inch.…”

Impact of human error on lumber yield in rough mills

“…Thus, if you would lay a board flat and put one side against a wall, the middle of the board would not be touching the wall. The boards were digitized according to Anderson et al [12]. Fig.…”