https://www.posetteforever.com/viewtopic.php?f=64&t=3930&p=45117#p45117
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Nik
Saturday, 27 January 2018, 10:59 PM

Re: Poser11 Pro .... A Big Jump From P4 !!
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Turns out that a spiral stair with 18+2 segments per turn, 18º per segment, with a 5 inch rise, will be up by 20 inches when it reaches a landing on quarter-turn. 

And, a wall being two feet ( 24 inches) thick, that's just enough for four steps down with riser 5 inches and run 8 inches to access private room off the spiral. Think of those Medieval buildings with a peep-hole to watch proceedings in the Hall below...

Getting the straight VIP stairs for that wing just needed a 6 inch rise, 12 inch run, with a landing every 4 feet rise, the one at 8 feet rise being wider and 'U' shaped...


