I need to build a stand to elevate a water tank we're going to use to collect rainwater for watering the lawn & garden during dry weather. I'm planning to set 4x4 posts on Handi-Blocks and build a platform atop that, kind like a mini deck. I thought I would mortise stretchers between the 4 bys to give it some stability, kinda like a Roubo workbench. I figure it would save on the hardware expenses and give me some experience doing M&T joints and drawboring.

Never done anything quite like this, so I have questions:
  1. Anyone ever done a drawbore in treated lumber? I have a feeling it will be problematic.
  2. Should I just peg it instead of doing a drawbore?
  3. I have white oak logs on hand, but should I use something else for the pegs?
  4. Will it be more problematic, being out in the weather?
  5. Is this just a bad idea?


Thanks,
Charles