SLACK COOPERAGE 137 



EQUIVALENTS 



There are no universally adopted figures of the number of hoops, 

 staves and heading of given sizes that may be cut from 1000 bd. ft. 

 of logs or from a cord of bolts. However, the following equivalents are 

 accepted by a large number of companies: 



For an average run of logs, about 2400 staves 30 in. in length and 4 in. 

 in width may be cut from 1000 bd. ft. of logs measured by the Doyle 

 rule. It is said that in Arkansas i cord of bolts 32 in. in length measured 

 with the bark will yield 1000 staves or without bark 1200 staves. Bolts 

 of this length are usually stacked 4 ft. and 12 ft. long, which makes the 

 standard cord of 128 cu. ft. 



When the dry thickness of heading is ^ in. and IQ| in. in diameter, 

 1000 bd. ft. of logs, Doyle rule, will yield 2000 pieces of heading, or 

 about 400 sets. 



Measured by the same rule, 1000 bd. ft. will yield 4000 cut hoops 

 or 3000 sawed hoops. 



STOCK WEIGHTS 



The following is a list of weights adopted by the National Slack Coop- 

 erage Manufacturers' Association in 1915. The heading is kiln-dried; 

 the staves are thoroughly air-dried, and the hoops are in the usual air- 

 dried condition for shipment. 



STAVES 



Elm, North of the Ohio River. Weight Per 



Thousand Pieces 



28^ in. staves, cut 5 to if in., avg. 4 in. wide 780 Ib. 



30 in. staves, cut 5 to if in., avg. 4 in. wide 830 Ib. 



32 in. staves, cut 5 to if in., avg. 4 in. wide 885 Ib. 



34 in. staves, cut 5 to if in., avg. 4 in. wide 945 Ib. 



33 in. staves, cut 5 to if in., avg. 4 in. wide 915 Ib. 



285 in. staves, cut 6 to 2 in., avg. 4 in. wide 680 Ib. 



Elm, South of the Ohio River. 



285 in. staves, cut 5 to if in., avg. 4 in. wide 800 Ib. 



30 in. staves, cut 5 to if in., avg. 4 in wide 840 Ib. 



32 in. staves, cut 5 to if in., avg. 4 in. wide 925 Ib. 



34 in. staves, cut 5 to if in., avg. 4 in. wide 1000 Ib. 



285 in. staves, cut 6 to 2 in., avg. 4 in. wide 700 Ib. 



Gum, Mixed Staves. 



285 in. staves, cut 6 to 2 in., avg. 4 in. wide 700 Ib. 



