28 



BULLETIN 1077, U, S. DEPARTMENT OF AGRICULTURE. 



edges of the concrete pavement, back filling the trench to the level 

 of the bottom of the pavement with stone or gravel. Whether the 

 tile should be used under both edges of the pavement will depend 



TYPICAL SECTION OF 9 FT, CONCRETE ROAD 



TYPICAL SECTION Of 18 FT CONCRETE ROAD 



wrTH CROWTICD SUBGRAOE 

 'C "SHObtO BE FMM 15 TO 5 



-^--^^1^=^; 



J 'rods J- 6 '/ar'g, ^Sc/oC- 



5ECTI0N WITH CURBS 





d Co/Jcrefe 



"~7 



^ rods J-6 /o/yg^ 8-S c fo 



SECTION WITH ONE CURB 

 rORSIDC HILL CUTS 



^s rods 3-6 /ong, ^S c.foc 



SECTION WITH CJHERS 



« STYLE or at/TTEB ACCORtl«6 Tt» COftOmOttS 



C SHOULD BC niOTI Ig TO a 



Fig. 7. — Typical pavement cross-sections. 



upon the location of the pavement. On sidehill work one line of 

 tile under the edge of the pavement nearest the hill will often suffice, 

 but through cuts it will probably be necessary to use the tile on 



