Can't modify maximum number of risings.

[Anonymous]

Hello everyone!

I'm recreating a street set of stairs that is located by my site area, and as such need to place exactly 19 risers, but I can't do it at all. Everytime I enter the desired number of risers it gets grayed out and Revit "forces" me to have only 15-17 risers.

I'm sorry if this is a basic task, but I'm really new to revit (I have had only one class friday and I'm trying to learn it on my own since then)

Thanks in advance!

[barthbradley]

your formula for calculating riser/tread is ruling. You need to override rules. 

[Anonymous]

Thanks for replying!

Well, I tried changing the formula, but all that Revit lets me do is modify acceptable values for Blondel's formula. I changed it to minimum 6 and maximum 7 and it still wouldn't work! Do you have any suggestions as to where to
change this?

[ToanDN]

What is the height of the stair?  Did  you edit stair type and check Stair Calculator?  I would keep it off so you have more freedom control the dimensions.

Start the stair command, just enter 19 for the Desire Number of Risers and Revit will adjust the riser height.

I don't know of a way to modify the number of risers of an existing stair without changing the overall stair height.  When I run into such cases, I just simply recreate the stairs  edit the existing stair, delete the existing run, and create a new run with the desired number of risers.

[RDAOU · Accepted solution]

 Hello @Anonymous

I am a Little bit confused with everything on this post and the mix of Information transmitted so I am just going to type what I know

1. I have never previously heard of Max No. of Risings/Risers...There is a desired Number of Riser and an Actual Number of Risers.
2. The Desired number of risers is a figure which the user Inputs. It is not dictated by revit and definitely not governed by a formula/calculation rule
3. The formula in Stair calculator; (if checked) would calculate the Initial target slope when the user first places the stair. After the user finish/Ends sketch mode, user can still mess up with the Slop again regardless of the formula (so it is not restrictive or constraining)
4. When user first starts the stair; the user may Input any value for Desired no. of Risers based on which Revit subsequently calculates  the height of a riser required to achieve a certain slope and reach a certain Level using a Treads of a given depth
5. as Long as the hight of such risers does not exceed the Maximum height of a riser which is given by the user, Revit will allow the user to place the desired stair. If the calculation results a higher riser (Dimension - not Count), Revit will prompt the user for Action; yet will allow the user to continue and place the stair overriding the max riser height initially given by the user (So again it is non-restrictive)

AFTER PLACING THE STAIR AND EXITING SKETCH MODE

1. To Change the Riser height; select the stair and the Number of Desired Number of Risers
2. To fix the Actual Number of Risers (which is greyed out)...select stair and edit it to enter scetch mode > select the Run in plan or section view > then drag the end.

I heve never before seen the stair tool (as crumbersome as it is) changing or dictating a specific number of desired risers no matter how the user changes it

[ToanDN]

@RDAOU

Drag and stretch the stair end grip will add or remove steps, and also increase or decrease the overall stair height. The riser height remains unchanged.

[RDAOU]

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@ToanDN wrote:
@RDAOU

Drag and stretch the stair end grip will add or remove steps, and also increase or decrease the overall stair height. The riser height remains unchanged.

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@ToanDN

Isn't a step a riser after all? and the number of steps is = to number of risers?

Nonetheless, I think it is what I said (increase or decrease the number of risers/steps)...IF ONE NEEDS TO CHANGE RISER HEIGHT after placing the stair. One has more or less entered Manual mode where Actual no. of Risers is now fixed (as per Initial Placement). So unless one wants to increase the height of the riser and maintain the number of steps; one will need to adjust them to go with the total height required to reach a certain Level/floor

1. Increasing the desired number of risers FORCES tool to recalculate riser height
2. When one amends the riser height, Revit will not Change the actual number of risers to ... Hence unless the user wants to maintain that number if steps, To fix the Actual Number of Risers (which is greyed out)...select stair and edit it to enter scetch mode > select the Run in plan or section view > then drag the end. (ie: when one can't have 2 steps of 50cm high each to reach a 3 meters high Level...or when the steps of 50cm heigh turns out too many)

Edit: It is an observation of how it functions and not a recommendation of what OP should do

If it is only the number of riser to increase then just dragging the run in edit mode suffice...

+Screencast

[ToanDN]

I thought the same and typed up a response about entering sketch mode and stretch the run. It did add risers but also made the stair taller, the riser height unchanged at all. I believe OP wants to add more risers but keep the stair height the same, aka reduce riser height. So, I had to delete the response and went for the replacing run in edit mode approach. I take that you are on mobile now so when you have a PC, verify it. I am 100% certain that I am correct.

[RDAOU]

@ToanDN no actually I am on PC but screencast slow to upload...bad weather connection

After placing the stair and then going back and editing it...the only way I know to recalculate the riser height is by changing the Desired number of risers.

Once that is changed (example making it less than ist Initial value ... say 150mm instead of 160mm), user has to ultimately increase the number of riser to reach Level or adjust dept to fix slope

And vise versa...if user wants to increase the number of step; as you mentioned, it will be higher than the Destination Level..so ultimately user has to reduce riser height and that goes via edit stair and adjust "Desired Numebr of Risers"

It is like saying the same sentence writen once in English and once in German... the german one tends to look/Sound like the same but backwards  (with subliminal Messages) ... me and my sense of Humor lol but hey they cant accuse me of racism for that...I am German rofl

Anyhow; I won't mention anything about skinning cats and the 1000000 ways to do it ...JUST IN CASE the moderator or some sneaky chipmunk turns out to be cat Lovers and take that metaphore literally...And you'll be surprised if you knew the everlasting Generation old  love Story between chipmunks and cats

[ToanDN]

Yup. Change Desired Number of Risers THEN Edit Stair and Stretch the end grip to change Actual Number of Risers. Or vice versa. Either will work.

[barthbradley]

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RDAOU wrote: I am a Little bit confused with everything on this post

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I feel the same way.

There seems to be way too many words here. I wonder if Ana, who is “new to revit” and “had only one class” will ever be able to understand all this.  I doubt it.

What she said she wants to do is: “recreate” a stair with an “exact” number of risers. Well, in the old days, we did this by dividing the overall stair rise by the number of risers desired. For instance: a 10 ft. rise divided by 20 risers = 0-6” Maximum Riser Height.

Done.  No brain surgery needed.

[RDAOU]

@barthbradley So thanks to the so many words at least you figured out it's not the formula...that's good enough 

you're welcome too 

[barthbradley]

It IS the "formula". Been using it for over 25 years. LOL.

But, if your point is that I didn't use enough words in my original post to Ana; okay, you got me! Maybe I could have better articulated and not been so cryptic. But, in my head, I knew exactly what I meant. HA! 

Prost

P.S. Nice Avatar. Is that the kid's new bike? Sweet. Did you put training wheels on it? 

[RDAOU]

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@Anonymous wrote:

It IS the "formula". Been using it for over 25 years. LOL.

But, if your point is that I didn't use enough words in my original post to Ana; okay, you got me! Maybe I could have better articulated and not been so cryptic. But, in my head, I knew exactly what I meant. HA! 

Prost

P.S. Nice Avatar. Is that the kid's new bike? Sweet. Did you put training wheels on it? 

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@barthbradley 

See that's why you shouldn't undermine beginners and their potential and capabilities to learn and understand things the right way 🙂 ... getting old might be something nice but it does have it's downfalls... example: Sight and vision (two things which are quite sharp when one is a beginner)

PS: try to avoid any critique on my bikes...there comes Christ the lord, family and straight after my bikes. So try to be cautious.

[ToanDN]

@RDAOU  Glad to see another motorcycle enthusiast 😉

[barthbradley]

There was no criticism at all, Buddy. It's a sweet picture. I would never make a derogatory remark about a man's bike, kid...or wife. That's not me. If it came across that way; my apologies. That was not my meaning.