Interesting. Thanks for the cite and for the very helpful response. They mention the G-185 bracket, and my understanding is that's the normal rating you should use for any ACQ lumber (Z-max). As I think about it, if I use backfill of rocks, the underground bracket doesn't ever really touch the ground - just water, which should drain.
One curious thing: they don't show a J-bolt in the plan when the bracket's underground, but they do when it's above the surface. I can't believe that's a mistake. Does that make sense?
Finally, I am not sure how I know what my soil is. I poured some water into a footing hole before filling it with concrete, and it seemed to drain off pretty well. The soil isn't sandy, and when I look underground I see some clay but mostly little granules. I'm guessing this is fine for the rocks. Does that sound right? If the soil doesn't drain well, it seems that I would be better off just backfill with dirt. Not as much water that way to just sit in the hole.
Thanks for all the interesting and useful responses. |
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