help me build the treehouse spiral staircase!

update: putting more thought into it and i think going with something closer to this design might be the way to go.

 

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now that the more supportive supports are in place, the next project is to make safe staircase. a ladder is just asking for trouble, especially when you ascending and descending at night in the dark while watching movies.

 

i think a spiral staircase would look great and not take up as much space a regular stairscase. i'm going to try and follow a modified version of this plan build mostly from wood and not metal (except for a few important parts ).

 

and you can help me build it! i need a metal plate that fits curve of 4" pole with 1" hole in center and 5/8" ( maybe 3/8" ) holes at corners. i could custom fab them but that would get spendy with number of them that i need.

 

surely such a thing must be available at specialty plumbing/electrical shops?

 

Done