topic Re: AC 24 when does 21 = 20. When labelling Stair Flights in Documentation

AC 24 when does 21 = 20. When labelling Stair Flights

fuzzytnth3 — Thu, 06 Feb 2025 10:25:09 GMT

I was trying to use a Label to save me counting how many risers are in a Stair flight and discovered if you label it to show the toatl number of risers per flight it says in this case 9 : 11 total therefore = 20

Whereas if you label a Stair with the total number of Risers it says 21

The correct answer is the first flight has 10 risers and the second flight has 11 which is a total of 21

Me thinks sometimes ArchiCAD can't count!

Re: AC 24 when does 21 = 20. When labelling Stair Flights

Barry Kelly — Thu, 29 Apr 2021 14:41:30 GMT

Labeling the risers in a flight does not include the risers in the landing.
Where as the risers in a stair includes them all.
Same when you are scheduling.

I don't think you can label/schedule the risers in a landing though - although I have not had a good look at this.

Barry.

Re: AC 24 when does 21 = 20. When labelling Stair Flights

fuzzytnth3 — Thu, 29 Apr 2021 15:08:47 GMT

Seems a bit daft that.

Its modelled as a dog leg stair so the landing is part of the Stair, I don't see why it shouldn't count the risers per stair flight. You wouldn't say to the fabricator its a two flight stair one flight with 9 Risers and the other flight with 11 and oh yeah the Landing has one riser.

Which riser is counted as part of the Landing? The one going up or the one coming down?

Ah well I won't be using that bit of Autotext thats for sure

Re: AC 24 when does 21 = 20. When labelling Stair Flights

Barry Kelly — Thu, 29 Apr 2021 23:58:46 GMT

fuzzytnth3 wrote:
Seems a bit daft that.

Its modelled as a dog leg stair so the landing is part of the Stair, I don't see why it shouldn't count the risers per stair flight. You wouldn't say to the fabricator its a two flight stair one flight with 9 Risers and the other flight with 11 and oh yeah the Landing has one riser.

Which riser is counted as part of the Landing? The one going up or the one coming down?

Ah well I won't be using that bit of Autotext thats for sure

I totally agree it is a bit silly.
I would say the riser on the bottom flight is the one that belongs to the landing (it is a different colour in your image).
I would expect that it be counted with the landing - especially when you have a flat landing as in your image - to me that is the same as having a floor at that level.

If Archicad can count treads/risers in flights, it should also be able to count them in landings and winders (I am pretty sure it can't do this).
At least we can do it for the entire stair.

Barry.

Re: AC 24 when does 21 = 20. When labelling Stair Flights

Erwin Edel — Fri, 30 Apr 2021 14:39:35 GMT

I didn't know it could count per flight. I still think you an only set the total number for a stair with a landing in the settings. Odd!