Junction Box Riser

[Rpardo_A36]

Hello,
I would like some clarification on the design of a riser to a junction box.
Should be pretty simple, but this riser I need to analysis is 36' long underground and I know you will need to consider pressure from the soil and live load at the top of the riser.
For my calculations, if I am doing it correctly. Results in large loads that gives me trouble using houston standard design for risers.
any information will help.
Thanks

 

[DoubleStud]

Are you talking about round risers? You don't design it. You just follow ASTM standard reinforcement I believe.

 

[Rpardo_A36]

In the details, it's shown as a square riser.
It does have the suggested size and spacing of rebars, but I would like to reassure the current design is adequate.
Please see below for attached details.