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Forum topic by Stamper471 posted 04-01-2017 06:45 PM 865 views 0 times favorited 11 replies Add to Favorites Watch
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Stamper471

11 posts in 1048 days


04-01-2017 06:45 PM

Hi there all,

I am trying to design a set of collapsible spiral stairs like the attached pictures. I am struggling to find hardware that would work for the pivot. Barring being able to find appropriate hardware, I will probably try to design some way to pivot using wood. I am trying to achieve 3-4 ft of rise, and it needs to actually be weight bearing ( not just decorative).

Ideally I will be setting the pivot point in the wall.

I am not worried about this being ‘code’ by any means. But I am trying to achieve something very attractive and high quality in a very limited space (30” x 40”). And I do not want a drop down attic ladder.

Any help would be appreciated!

Stephanie


11 replies so far

View jerryminer's profile

jerryminer

800 posts in 1277 days


#1 posted 04-01-2017 06:55 PM

can’t you just use a strap hinge for each section?

-- Jerry, making sawdust professionally since 1976

View papadan's profile

papadan

3584 posts in 3204 days


#2 posted 04-01-2017 06:58 PM

You’re only needing 3-4 steps? Not following the “pivot set in the wall” part?

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Stamper471

11 posts in 1048 days


#3 posted 04-01-2017 07:55 PM

I need a strap hinge that essentially stacks (so the pin would be able to fit through all the hinges.

With regard to the ‘set in the wall’ comment, that is probably irrelevant for this topic. Sorry.

If I can achieve 3-4 feet of rise in this manner then I will be above the height of a cabinet that I am trying to preserve. Then I can change to a more conventional form of space saving stairs.

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papadan

3584 posts in 3204 days


#4 posted 04-01-2017 08:20 PM

If the “pin” and strap hinges can be metal then there is no problem getting or having them made. Otherwise, do you have a lathe that you can turn hardwood tubes and pin on?

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papadan

3584 posts in 3204 days


#5 posted 04-01-2017 11:01 PM

In the idea of your picture

View jerryminer's profile

jerryminer

800 posts in 1277 days


#6 posted 04-01-2017 11:06 PM



I need a strap hinge that essentially stacks (so the pin would be able to fit through all the hinges.
- Stamper471

Why a single pin? Why not just stack some individual hinges?

-- Jerry, making sawdust professionally since 1976

View Nick424's profile

Nick424

63 posts in 476 days


#7 posted 04-02-2017 01:10 AM

Could you use a piano hinge, and just cut the one side into multiple pieces for the different steps?

View Carloz's profile

Carloz

967 posts in 427 days


#8 posted 04-02-2017 01:44 AM

One metal strip for each step and one metal rod for the whole construction. Wrap the end of each strip around the rod and you are done. Pretty easy to make with just basic tools.
However.
I am not convinced this is a sound design no matter what hardware you use. You need at least two points of contact to make it acceptably rigid. With just one everything is bound to fall apart.

View Loren's profile (online now)

Loren

9623 posts in 3483 days


#9 posted 04-02-2017 01:49 AM

hire a welder.

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Stamper471

11 posts in 1048 days


#10 posted 04-02-2017 11:56 AM

Carloz, thanks for your second comment about that not being a sound design! That is exactly the kind of stuff I need to hear and the reasoning for why.

So I could get a welder to fabricate it for me… but the whole idea is for this to be mobile , collapsible. So I would still need to figure out a design that essentially acts like a stackable pivot hinge.

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Stamper471

11 posts in 1048 days


#11 posted 04-02-2017 12:03 PM

papadan.

Thanks for your reply and your terrific rendering. one day I hope to be able knock something like that out no problem!

While I don’t turn, I have plenty of friends that do and could ask/hire one of them to do that part.

I love your idea. But would like to explore the metal fab angle first. Anyone have any ballpark ideas on what this type of job would cost? I have never used custom metal fab guys at all!

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