460 SELLING LUMBER 



Cubical contents shall not be used as basis for obtaining per- 

 centage of heartwood under this rule. 



47. No. 1 COMMON CAR SILLS AND FRAMING will 

 admit of sound knots, provided they are not in groups, the 

 mean or average diameter of which shall not exceed 2 inches, 

 pitch, pitch pockets, slight shake, seasoning checks, sap, sap 

 stain or other defects which will not impair' its strength more 

 than the defects aforementioned. Must be sawed true to meas- 

 urements and from sound timber free from dote or rotten red 

 heart; must be square cornered, except that 1 inch of wane 

 on one corner or ^ inch of wane on two corners is admissible. 



48. SIZES up to 6 inches in width shall measure full 

 when green, and not more than */-inch scant when dry or part 

 dry. Sizes 6 to 12 inches in width shall measure full when 

 green and not more than J4~ mcn scant when dry or part dry. 

 Sizes 12 to 16 inches in width shall measure full when green 

 and not more than %-inch scant when dry or part dry. Un- 

 less otherwise specified, one-fourth inch shall be allowed for 

 each side which is to be dressed. In pieces 3 by 6 inches and 

 under when ordered in lengths exceeding 30 feet, sound knots 

 shall not exceed one-quarter the width of the face through which 

 they project, and the grains shall not cross sufficiently to impair 

 the strength. 



STANDARD LENGTHS. 

 CAR SIDING 8, 9, 10 and 12 feet or multiples. 



CAR LINING 8, 9, 10, 12, 14, 16, 18 and 20 feet or mul- 

 tiples. 



CAR ROOFING 5 feet or multiples. 



CAR DECKING OR FLOORING 9 and 10 feet or mul- 

 tiples. 



All orders shall be shipped in standard lengths unless other- 

 wise specified, but no lengths of either car siding, lining or 

 roofing shall be shipped, except in the lengths specified or mul- 

 tiples thereof. When stock is not desired in multiple lengths, 

 order should so specify. 



