Begveeeion Coefficient for Skidding Equipment: (from Brown (1967)) 



Medium Crawler; 



ai = 0.10518 



32 = 0.00201 



33 = 0.01257 

 3it = 0.00027 



Large Crawler: 



32 



as 

 ai+ 



0.10736 

 0.00133 

 0.01502 

 0.00048 



The computer output for this example follows (table 2), showing that the most 

 economic cost method is a medium skidding crawler and road spacing of 675 feet, with- 

 out landings. This solution, then, is the optimum for the conditions in the example, 



Table 2 . --Results of skidding evaluation 







: NO 



LANDINGS 





LANDINGS 





Construction 

 method 



: Skidding 

 : method 



: Cost 

 : $/MBF 



Horizontal 

 road 

 spacing 



: Cost : 

 : $/MBF : 



Horizontal : 

 road : 

 spacing : 



Landing 

 spac ing 









Feet 





- - - - - Feet 





Large 

 Crawler 



Medium 

 Crawler 



11.0020 



675 



11.0751 



775 



850 



Large 

 Crawler 



Large 

 Crawler 



12,4045 



575 



12.6840 



675 



750 



11 



