BOXES AND BOX SHOOKS 255 



sizes of cans which each box is designed to contain, the thickness and 

 sizes of the individual shooks used in boxes and the number of nails. 

 These specifications were based on years of experience followed by tests 

 made at the U. S. Forest Products Laboratory and were adopted in 1917 

 by the National Association of Box Manufacturers, the National Can- 

 ners' Association and the National Wholesale Grocers' Association. 



STANDARD SPECIFICATIONS FOR CANNED FOOD BOXES 



DOMESTIC 



Style A: NaUed Wooden Boxes. 

 Style B: Lock Corner Wooden Boxes. 



Boxes must be well manufactured from lumber which is sound (free from decay or 

 dote), and well seasoned. Boxes when stored after nailing should not be placed in a 

 heated room. Lumber must be free from knot holes, loose or rotten knots greater 

 than i in. in diameter. No knots will be permitted which will interfere with the 

 proper nailing of the box. 



The grouping of woods with the specifications following will govern: 



GROUP i 



White pine Basswood White fir 



Aspen Cypress Cedar 



Spruce Southern yellow pine Redwood 



Western yellow pine Hemlock Butternut 



Cottonwood Virginia and Carolina pine Cucumber 



Yellow poplar Willow Alpine fir 



Balsam fir Noble fir Lodgepole pine 



Chestnut Magnolia Douglas fir 



Sugar pine Buckeye Larch 



Boxes to Carry: 



24 No. 2\ cans; 

 24 No. 3 cans; 

 6 No. 8 cans; 

 6 No. 10 cans; 

 And other cans of approximately the same content. 



NAILED CONSTRUCTION" 



Ends. 



Xot less than f in. thick one or two pieces. 1 Two-piece ends, cleated or fastened 

 with three corrugated fasteners. When one-piece sides are used the third corrugated 

 fastener may be omitted. 



1 The thicknesses specified herein are to allow for an occasional unavoidable variation in manufac- 

 -ure, but that variation shall not exceed one sixty-fourth of an inch below the thicknesses specified. 



