STRENGTH REQUIREMENTS FOR ROUND CONDUIT 



751 



Ftp = 



12xMniax 



(3) 



where 

 Ftp 



r 



equivalent two-point load (lb/ft) 



maximum bending moment in conduit (in X lb) 



radius of conduit (in) 



I700 



1600 

 1500 

 1400 

 1300 

 lEOO 

 MOO 



</> 



m 1000 



_i 



o 



<t 900 



o 



^ 800 - 



5 



o 



700 - 



600 



^ 500 



5 



S '^oo 



300 

 200 



100 - 



10 



20 30 40 



HEIGHT OF COVER (IN) 



50 



60 



Fig. 12 — Equivalent two point load ver.sus height of cover for clay backfill. 



