Sketches showing position of reinforcement in circular sewers and conduits given in 

 accompanying tables. Note that when using one layer of reinforcement, the steel should be within 

 one inch of the inside surface at the top and bottom of the ring and within one inch of the outside 

 surface at the sides. When two layers of reinforcement are used they should be within one inch 

 of the inside and outside surface as shown in the above sketch. 



