If anyone is interested, I am in the process of building a spiral staircase for a renovation I am doing in my commercial building. I am documenting the process in the WingWalkers Forum. The tread assemblies and the metalwork are complete, and as soon as the metal is painted, assembly will commence. You can see the process here

If you are interested in where this is happening, go to The Center of the Universe There is an aerial shot of my little empire on page 3.

Bump for update on progress. Got it assembled today.

Go here if you don't feel like scrolling up to the top post.:)

Nice work!

Damn nice shop!

Wow, very nice work.

Some companies also make them so you just need to assemble them. Easier, but maybe not so much fun if you´re into woodworking.

http://www.youtube.com/watch?v=zmu8H11O02s

Absolutely amazing. I have no such skill and it's really cool watching someone who does.

More progress

Bump

Keep the updates coming Pierre! Looks great!

btw, what will you do with the center post? Will it just be a beam, or will you finish that too?

I think you may be talking about the temporary 2"x6" shoring post. It will be removed as soon as the engineering around the stair is finished. I will also be extending the center post (of the staircase) to the ceiling to anchor the railing along the edge of the loft floor. I am engineering as I go.

There will be a bedroom under the skylight with a 3' balcony for access. (See the pano and imagine that the curved edge of the loft framing is straight.) The railing along that edge will support the loft floor. It will probably be a truss resting on the center column of the spiral, and a yet to be built pony wall at the jog, with support in the middle provided by a tension member coming down from the peak of the roof. At the right end of the balcony, (where the edge jogs back) a stair will go up over the beam and lead to a door of some sort in the roof leading to a rooftop deck.

I have until Christmas to finish the whole project. Believe it or not, there are two tenants occupying the space. Everything gets built in my shop elsewhere on the property, and screwed in place when the tenants are at work.