3290 Chapter 27 



27-2 PRODUCT YIELDS AND MEASURES 



Most wood products are sold by measures distinctive to tlie product. The 

 paragraphs and tables in this section contain conversion information that has 

 been found useful. 



LUMBER 



The subsection THE BOARD FOOT— LUMBER SCALE defines the unit of 

 measure for lumber. Data on lumber yields, by volume, are given in this chapter 

 in paragraphs headed Cords to board feet lumber scale, page 3279; Board feet 

 log scale to board feet lumber scale, page 3281 (see also tables 27-106 through 

 27-111); figs. 27-9, 27-10); Cubic feet to board feet lumber scale, page 3287 

 (see tables 27-100, 27-109, 27-212); andLo^ weight to board feet lumber scale, 

 page 3289. 



Lumber and residue yields, in cubic feet, are listed in tables 1 8-57 through 1 8- 

 62 for six species by tree diameter and merchantable height. Chapter 18 also 

 discusses the effects of various sawing and machining practices on the amount of 

 lumber recovered. 



Lumber yields, by grade, from hardwood logs and trees are discussed in 

 sections 12-7 and 12-8 (see tables 12- 12 through 12-23, tables 12-26 through 12- 

 31, and tables 12-34 through 12-40ABC). See also Forest Prod. J. 35(1): 26-32. 



Volumes and value losses during lumber drying are covered in section 20-3 

 and tables 20-1 and 20-32. 



The weight of 1 ,000 bd ft of lumber is discussed in this chapter under the 

 paragraph heading Weight of lumber, page 3277. 



Woodfin (1964) provided tables of lumber yield by grade from mill-run 

 hardwood sawlogs when veneer grade logs are removed as opposed to when 

 veneer grade logs are not taken out but are sawn for lumber. 



VENEER AND PLYWOOD 



Although plywood is manufactured in a variety of thicknesses from a range of 

 thicknesses of veneer, the mensurational common denominator of the industry is 

 1,000 sq ft of yg-inch-thick plywood. Surface measure (square feet) of other 

 thicknesses can be converted to ys-inch basis if multiplied by the following 

 factors: 



Panel thickness 



