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Chapter 27 



M 148 578 

 Figure 27-1 5A. — Selects — Predicted yield of 1 -inch-wide cuttings when lumber is pro- 

 cessed by gong ripping first. (Drawing after Hallock 1980.) 



The indicated percent is 35.7. Now the yield for the next longest cutting will be 

 predicted. This yield is determined by finding the intersection of a line projected 

 vertically from the 60-inch primary cutting and the 48-inch "Length of Subse- 

 quent Cutting" curve. From this point, project a horizontal line to the far left 

 scale. The percent yield is seen to be 45.0 percent. The other two subsequent 

 length cuttings of 26 and 12 inches are determined in the same manner as the 48- 

 inch cutting. 



These yields will be found to be 57.4 percent and 61.8 percent, respectively. 

 All values are entered in the calculation form, table 27-121. 



The values shown on the nomogram are for a rip width of 1 inch. Rip widths 

 other than 1 inch require adjustment by the use of the width adjustment nomo- 

 gram (fig 27-16B). In this case, the rip width is 1.5 inches. Beginning with the 



