680.10 isn't about how weight on the raceway will affect it, though it is something that must be complied with.
the weight per square foot of the base of the pool isn't as much as one might think though.
Someone correct me if I am wrong, but wouldn't 40 inches deep water in the pool exert 40 inches of water column equally across the entire bottom of the pool? I also believe you would likely apply more force to the conduit if you used a mechanical compaction machine when backfilling the trench then this static load would ever exert on it.
I live for today, I'm just a day behind.
Bookmarks