67 



The average contents of bridge ties is 58.6 board feet, and of 

 switch ties, 44 board feet. About one third of these classes are bridge 

 ties, and the remainder switch ties, giving an average content for both 

 classes, of 48.867 board feet. Converting the board-foot contents by 

 this factor into ties, indicates the number so used in 1920 as 430,601, 

 and that used in 1921 as 428,737. 



The total number of board feet for bridge and switch ties, as taken 

 from the tables for 1920 and 1921, arfe respectively 21,012.204 and 20. 

 951,122 board feet. Converting the cross-ties into their equivalent in 

 board feet by using 35 board feet, gives for 1920 a total of 210.377,650 

 board feet, and for 1921, 202.502,300. or an equivalent in number of ties 

 of 6.010,790 (1920) and 5.785.780 (1921). 



The total number of all ties consumed becomes 6.441, 39'l for 1920 

 and 6,214.317 for 1921, and the total number of board feet for this 

 number of ties is 231,419,854 for 1920 and 223,453,422 for 1921. 



Consumption ix 1921 

 Cross-ties, Pieces 



Ties laid 



in replacement 



and betterment 



4.812,200 



236.380 



491.978 



Class 



Large roads 



Medium and small roads 



Switching and terminal companies. 



Totals 



Per cent 



5.540,558 

 95.7 



Ties laid 

 in new track 

 232.535 

 7.916 



4,771 



245.222 

 4.3 



Switch and Bridge Ties. Board Feet 



Large roads 15,343,954 1,182.347 



Medium and small roads 448.564 37.625 



Switcliing and terminal companies.. 3,728,336 210,296 



Totals 



Per cent 



10,520,854 

 93.2 



1,430.268 

 6.8 



Total ties 



5.044.735 



244.296 



496,749 



5,785.780 

 100 



16.526.301 



486.189 



3,938,632 



20.951,122 

 100 



The following table conveniently summarizes the foregoing details. 



RKrAPITflJlTION FOR THK Yk.\RS 1920 AND 1921 



Average for the two years 6.327,854 227,436,638 



