I just googled out of curiosity and the first one that came up looks pretty good. There are probably lots of options if I was able to find this.

https://www.paragonstairs.com/code-steel-stair-kit/?utm_source=google&utm_medium=cpc&utm_campaign=PLA&utm_term=steel-emmett&device=c&gclid=Cj0KCQiAnKeCBhDPARIsAFDTLTLnu_LQGgSC0B8HcGedA3tSE6jF3IEqSbSJzUJgkfnw5JA37uXqnVQaAoclEALw_wcB

I'm confused. There are regulations in the residential code for them (we're in California) - in what way are they illegal?

Paragon and other spiral stair kit companies don't sell the parts separately. I already inquired =(

I posted that in case it wasn't up to code and needed to replace the whole thing. But I don't see anything that seems not to code. Here is how it is written for CA residential: R311.7.10.1 Spiral stairways. Spiral stairways are permitted, provided that the clear width at and below the handrail is not less than 26 inches (660 mm) and the walkline radius is not greater than 241 /2 inches (622 mm). Each tread shall have a depth of not less than 63 /4 inches (171 mm) at the walkline. All treads shall be identical, and the rise shall be not more than 91 /2 inches (241 mm). Headroom shall be not less than 6 feet 6 inches (1982 mm).

What about this site? https://www.salterspiralstair.com/railing-parts/tread-covers/

They are the other company I called - they don't sell them separately for stairs that aren't theirs. =/

Thanks for the follow-up - not to worry, the loft won't be used as a bedroom!

Have you pulled up the carpet to see what is underneath? You might be able to paint the wood underneath to hold you over until you can get new treads made.

I like to tell customers to budget 'roughly' $100 per tread. In a situation like this, with custom stuff you might have to increase that to $150 - $200 per tread.

The cost is the single biggest reason for carpet. Just so you know.

Those stairs are code.

Joe is right there is nothing wrong with this staircase.

They might be perfectly acceptable and 100% to code but if they get used with any regularity it is only a matter of time before someone ends up in a heap.

Yes, if never used spiral stairs before, you have to pay attention.

When I was in Amsterdam we had them in the hotel, (it seems there is a lack of fire regulations there as egress goes). and elevator you can barely fit 2 people so I used stairs all the time, they are fun and add nice detail in some circumstances especially when you tight on space, or if there is a loft, to down into the basement as the second stair, etc... but if you have small kids in the house, they can be dangerous if they're not careful.

As for code ith really depends where you are . The fact that the stairs go to a loft is probably why no code issue. As fro the treads those are best done by a staircase builder .Safety is an issue that seems to be a big deal in NA spiral stairs have been around forever in Europe and somehow people are still living with them in some cases the only option if you want to keep sq footage.

Looks like the balusters are welded into the treads too which would require notching to fit. Then trying to get each tread to fit flush with the pole. Oh my. I had a similar inquiry a few years back. They gave up on the idea.

I don't think the balusters are welded onto the frame. It looks like the standard bolted on tread to me. It only appears to require a notch because the carpet was wrapped around the treads.

This type of stairs comes as a kit they cannot be welded. The entire staircase has to be assembled on site.

P.S Found some images of the spiral staircase in my Hotel, this stairway would never meet our building code, the depth of the treads very narrow, not even talking about fire codes.

I am also looking for a similar fix for our spiral stair. Lisa, How did this go?