Trillers
Civil/Environmental
- Feb 14, 2011
- 66
Happy New Year All:
I am designing a sewage lift station with 28' deep walls and liquid level will be maxed out at the 22' depth level. This work is being done for a general contractor who received this task as a change order to their contract. In the drawings provided for the contractor to price the change, the wall thicknesses are shown as 10".
The utility engineers provided this drawing.
My question is: All our previous work of this type conformed with ACI 350-6 which states that the minimum thickness of any wall 10' or higher, in contact with liquid, shall be 12". The utility designer is saying that the 10" thickness is acceptable since both sides of the lift station wall (liquid side and soil side) will be thoroughly sealed and the concrete protected against the moisture.
They also state that this exception is in the code (I'm assuming ACI?) but cannot tell me where and I cannot locate it.
Has anyone out there encountered this issue?
Can anyone provide guidance?
Thanks!!
Trillers
I am designing a sewage lift station with 28' deep walls and liquid level will be maxed out at the 22' depth level. This work is being done for a general contractor who received this task as a change order to their contract. In the drawings provided for the contractor to price the change, the wall thicknesses are shown as 10".
The utility engineers provided this drawing.
My question is: All our previous work of this type conformed with ACI 350-6 which states that the minimum thickness of any wall 10' or higher, in contact with liquid, shall be 12". The utility designer is saying that the 10" thickness is acceptable since both sides of the lift station wall (liquid side and soil side) will be thoroughly sealed and the concrete protected against the moisture.
They also state that this exception is in the code (I'm assuming ACI?) but cannot tell me where and I cannot locate it.
Has anyone out there encountered this issue?
Can anyone provide guidance?
Thanks!!
Trillers
