Measures and yields of products and residues 3449 



Table 27-115 — Recommended hardwood blank standard sizes of four qualities^ '^ 



CORE QUALITY, IN 26-INCH-WIDE PANELS^ 

 SOUND QUALITY, FOR CASE GOODS, IN 20-INCH-WIDE PANELS'* 



'Based on research conducted by the Northeastern Forest Experiment Station, USDA Forest 

 Service, Princeton, W.Va. 



^Quality definitions are as follows: 



Clear: CIF and C2F 



CIF (clear-one-face): This material is clear on one face, both edges, and both ends, and 



otherwise complies with the clear-two-faces quality, except that the reverse face may contain 



defects of sound quality. 



C2F (clear-two-faces): This material is clear on both faces, the edges, and the ends, except that 



sap wood, slight streaks, and small burls or swirls and light stain are permitted. 



Sound, for frames: This material may contain any defects that will not materially impair the 



strength of the individual piece for the use intended. 



Core: This material is sound on both faces, admitting tight sound knots, small worm holes, 



slight surface checks, or their equivalent. 



Sound, for case goods: Same as sound, for frames. 

 ^Core quality, in 16-inch- wide panels 



4/4 (15,18,21,23,26,29,34,40,50,60,70, and 95 inches long) 



5/4 (same as 4/4 except 85 inches is longest length) 

 "^Sound quality, for case goods, in 20-inch- wide panels 



4/4 (15, 18, 21, 25, 29, 34, 40, 50, 60, 70, and 95 inches long) 



