ROPES. TILE-DRAINING 

 Tensile Strengths of Ropes 



481 



Tile-draining 



Number of feet of drain tile required per acre when placed the specified 

 distances apart (Fippin) 



20 feet apart 2180 feet 



25 feet apart 1743 feet 



30 feet apart 1452 feet 



40 feet apart 1090 feet 



50 feet apart 872 feet 



100 feet apart 436 feet 



150 feet apart 290 feet 



200 feet apart 218 feet 



Limit of size of drain tile to grade and length (Elliott) 



2i 



