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    weldergirl's Avatar
    weldergirl Posts: 14, Reputation: 1
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    #1

    Dec 3, 2008, 02:39 AM
    Installing spiral staircase
    I bought an old metal spiral staircase from the 70's to attach to my deck outside to get to the yard. I'm trying to stay within code for resale (this is a new house. I added extra ballisters, but a friend mentioned the steps are only 2 feet wide and he thought this was not within code nowadays. Is this true? If so, what is code width? I live in NC. Also The top will be bolted to the deck and the bottom of the pole is a 5" x 10" plate with 4 bolt holes. After I pour a footing and small landing pad, how do I attach this and is this plate large enough for today's codes?
    InspectorDan's Avatar
    InspectorDan Posts: 17, Reputation: 2
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    #2

    Dec 5, 2008, 07:54 AM
    Hi Welder Girl,

    Congratulations on undertaking a difficult project. My reading of the 2006 IRC stair code indicates that you need at least a 10" deep tread at a point that is 12" from the inner radius of the circular stair.

    If you go to Stairway to Webbin': Oops! We've Moved Upstairs! you might be able to get more specific info.

    Good Luck!
    weldergirl's Avatar
    weldergirl Posts: 14, Reputation: 1
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    #3

    Dec 6, 2008, 03:47 AM
    Quote Originally Posted by InspectorDan View Post
    Hi Welder Girl,

    Congratulations on undertaking a difficult project. My reading of the 2006 IRC stair code indicates that you need at least a 10" deep tread at a point that is 12" from the inner radius of the circular stair.

    If you go to Stairway to Webbin': Oops! We've Moved Upstairs! you might be able to get more specific info.

    Good Luck!
    Hi,
    This web link you gave goes to a web designer not spiral staircases. Interesting about the tread depth but does the code say anything about the width requirements (from the center radius outward)?
    InspectorDan's Avatar
    InspectorDan Posts: 17, Reputation: 2
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    #4

    Dec 6, 2008, 07:57 AM

    Sorry about the bad link WldrGrl. I took it off the pdf file in my reference folder. If you do a web search for IRC stair guidelines or some such thing you should be able to find a good recap of the requirements that talk about baluster spacing, railing height, handrail dimensions, tread and riser dimensions, etc. Best of luck to you in your project.

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