topic Re: simple stair winders in Modeling

simple stair winders

Anonymous — Thu, 25 May 2023 14:59:36 GMT

I'm a new user trying to create a simple stair as shown in the attachment using stairmaker but I haven't found any combination of settings that does the trick - the winders always continue around the square landing area and won't meet at a single point.

I found an old post that indicated stairmaker just wasn't able to do this but since it was from 2004 I wanted to check in case there was an improvment made since then that would help.

I'll get archistair if needed but I was hoping to put it off a little longer as I just spent a good deal of money to by AC...

any help appreciated!

Re: simple stair winders

TomWaltz — Thu, 12 Jul 2007 20:46:11 GMT

Chris wrote:
I'm a new user trying to create a simple stair as shown in the attachment using stairmaker but I haven't found any combination of settings that does the trick - the winders always continue around the square landing area and won't meet at a single point.

I found an old post that indicated stairmaker just wasn't able to do this but since it was from 2004 I wanted to check in case there was an improvment made since then that would help.

I'll get archistair if needed but I was hoping to put it off a little longer as I just spent a good deal of money to by AC...

any help appreciated!

Stairmaker has not been updated since... uh .... 2000? 1999? so if it did not do it in 2004, it still doesn't, but I would not give up just yet on another way.

Is the screenshot what do want or what you do not want? Are you using the simple Archicad objects or building your own in Stairmaker?

Re: simple stair winders

Anonymous — Fri, 13 Jul 2007 01:41:12 GMT

the screenshot is what I want. I tried the stock AC stairs and also using stairmaker as well. I kept playing with the different values but no luck...

thanks for the help!

Re: simple stair winders

Stress Co_ — Fri, 13 Jul 2007 03:59:47 GMT

It maybe easier/faster to just model it out of slabs.

Re: simple stair winders

Jere — Fri, 13 Jul 2007 15:31:19 GMT

It can be done by modelling a custom stair using a fill pattern, line, and arc. It won't work with the points matching up unless you have a 0" nosing. That's actually realistic. Are you sure it's necessary to actually have them meet exactly? It's probably more tricky to build it that way.

Re: simple stair winders

Anonymous — Fri, 13 Jul 2007 15:48:11 GMT

Is that stair legal in Santa Barbara?

It's getting pretty hard to get winders to pass inspection.

BTW: I don't believe there is such a thing as a "simple" stair. I just finished making some custom stair parts for a client which are designed to make just the most basic concrete and steel stairs. Making them "simple" has been a terrifically complex task.

I have seen far more mistakes in designing, drawing and building stairs than any other building assembly. Cutting the stringers for just a single straight run of wood stairs takes a pretty skilled carpenter.

Re: simple stair winders

Dennis Lee — Fri, 13 Jul 2007 17:33:22 GMT

Matthew wrote:
Is that stair legal in Santa Barbara?

I believe the narrowest portion of the tread have to be 6" depth minimum according to CBC. It sure doesn't look right to me.

Re: simple stair winders

Anonymous — Fri, 13 Jul 2007 19:20:41 GMT

Matthew wrote:
Is that stair legal in Santa Barbara?

It's getting pretty hard to get winders to pass inspection.

As Dennis States below, the stairs are not legal.

Matthew wrote:
I have seen far more mistakes in designing, drawing and building stairs than any other building assembly. Cutting the stringers for just a single straight run of wood stairs takes a pretty skilled carpenter.

I do not want to go on a Engineer vs. Architect rampage (as most of you out here in cyberspace seem very conscientious), but Stair design, or the lack there of, is one of the weakest area in design an thought that I see in many plans.

Re: simple stair winders

Anonymous — Fri, 13 Jul 2007 19:28:08 GMT

Thanks for the input and suggestions. I should probably have mentioned that the plan is an as-built - as was mentioned, the stair would not be legal today but was in the past.

overalll, it sounds like I need to either model it myself or get archistair especially as even if it were a new stair, I don't like the apparent lack of control over which treads are angled and by how much.

Re: simple stair winders

rjwilden — Fri, 13 Jul 2007 19:29:24 GMT

Here in NZ the going or tread is measured at the walking line,which is 450mm out from the stringer. So that stair is legal here. Makes sence as you cant walk hard up against the handrail any way.

Richard.

Re: simple stair winders

Anonymous — Fri, 13 Jul 2007 19:34:41 GMT

rjwilden wrote:
Here in NZ the going or tread is measured at the walking line,which is 450mm out from the stringer. So that stair is legal here. Makes sence as you cant walk hard up against the handrail any way.

Richard.

Does the Stair still have to have a Minimum Walking width that does not include the 450mm?

Re: simple stair winders

Stress Co_ — Fri, 13 Jul 2007 23:17:14 GMT

Matthew wrote:
I have seen far more mistakes in designing, drawing and building stairs than any other building assembly.

My Favorite

Re: simple stair winders

Anonymous — Fri, 13 Jul 2007 23:53:52 GMT

2003 International Residential Code says:

311.5.3.2 Tread depth.
The minimum tread depth shall be 10 inches (254 mm). The tread depth shall be measured horizontally between the vertical planes of the foremost projection of adjacent treads and at a right angle to the tread's leading edge. The greatest tread depth within any flight of stairs shall not exceed the smallest by more than 3/8 inch (9.5 mm). Winder treads shall have a minimum tread depth of 10 inches (254 mm) measured as above at a point 12 inches (305) mm from the side where the treads are narrower. Winder treads shall have a minimum tread depth of 6 inches (152 mm) at any point. Within any flight of stairs, the greatest winder tread depth at the 12 inch (305 mm) walk line shall not exceed the smallest by more than 3/8 inch (9.5 mm).