DRAINAGE 



285 



taken in the same order in which they are to be dug. If 

 for immediate use, tile should be strung along the line of 

 the proposed trench placed end to end, four extras being 

 left for every hundred 

 feet to cover shortage and 

 inspection (Fig. 233). In 

 pasture fields where there 

 is stock, or in cultivated 

 fields where there is likely 

 to be a delay of some 

 weeks before they are 

 placed in the trench, they 

 should be unloaded in 

 piles of twenty-five to 

 fifty. If they are to lie 

 out through freezing 

 weather, or for several 

 months before construc- 

 tion, it is best to -.place 

 them in piles of one 

 hundred. 



Some tile-layers prefer 

 to have the tile placed at right angles to the trench. For 

 hand trenching the tile can be unloaded within 6 feet of 

 the right side of the stake line as one looks down. As 

 broken tile are valuable for covering cracks and open joints, 

 all pieces should be hauled out and scattered along the line, 

 especially at curves and junctions. These pieces fit better 

 if they are from tile at least 1 inch larger in diameter than 

 the tile with which they are to be used. 



Trenching. In trenching by hand a line is stretched at 

 a uniform distance from the stake line. The edge of 

 the ditch should come as near the stakes as it can be dug 

 without disturbing them. This line marks one edge of 

 of the trench. The width of the trench at the surface 

 varies with the depth of the ditch, being just wide enough 



Fig. 233. 



After University of Minnesota 



Distributing tile on the line 

 of trench 



