PIPE LINE STRUCTURES 



GATF.S 



After the pipe line is laid in the trench, the auxiliary structures 

 are built in place. Gate pits are located at frequent intervals, de- 

 pending on the fall, or gradient, and the location of laterals. A 



^E.CT10rf 



^E-CTIOM 



Fig 28. — Desig-n for square pit, with 

 bevelled-seat gate. Circular gate pits are 

 more easily reinforced and can be made 

 in sections in pipe molds. 



Pl.at^ 



