how to build a custom treehouse spiral staircase without spending a fortune. the first step.

how to build a custom treehouse spiral staircase without spending a fortune. the first step.

having procured the pole to build the staircase around, it was time to test the first step. i’ve spent endless hours trying to figure out how to build a secure staircase without spending thousands of dollars and i settled on a very basic design that uses heavy duty 20” angle brackets from home depot that are rated to hold 600 pounds. i hoped to get away with using one for each step but there was, predictably, a bit of wiggle when i attached the 12″ wide tread to the 1” bracket even when using some beefy lag bolts.

i was ruminating on how to make it more sturdy and odin said, “use two brackets?”

of course! it’s a little tricky to get the brackets lined up with the curvature of the pole and exactly in the right spot on the tread but it’s sooooooolid!

the brackets are $10 a piece and the most expensive part of the staircase so using two per step doubles my cost, but it’s worth it to ensure a stable step that will last for years and it’s still 1/10th of the cost of getting a custom staircase kit. i’m not happy about the white color but if you want a 20” angle bracket rated to 600 pounds you can have any color you want as long as it’s white.

this is just a test step. the pole is going to get sunk 3.5 feet in the ground and i’m going to build the staircase from the top down.

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