Structural Flakeboards and Composites 

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2973 



12 



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O 10 



II- ^^' 



ALIGNED FACES 



RANDOM 



45 46 47 48 49 50 51 52 



45 46 47 46 49 50 51 52 



44 45 46 47 48 49 50 51 



DENSITY (POUNDS PER CUBIC FOOT) 



Figure 24-38. — Relationship of modulus of elasticity (top), modulus of rupture (center), 

 and internal bond strength (bottom) to panel density in three-layer, 1/2-inch boards 

 made of lathe flakes, with random cores and either aligned or random faces. Cores 

 and faces contained 20 percent each of white oak, hickory, southern red oak, sweet- 

 gum, and southern pine. (Drawing after Hse et al. 1975, from Hse and Koch^) 



