Helix - not one full turn - HOWTO?
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Well, true that not exactlythe same dimensions... Especially the "walkline" - I used completely different measures so this is just an example.
The 18 is handy because 360 can be divided by 18. Then you take two of them and have a very similar number as your 324,xxx degrees (exactly 320).
When working with segmented curves in SU, it is extremely hard to count with those long decimal digits.
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Had I realized you wanted to make 'spiral stairs' I would have suggested my 'Grow' tool...
Unzip this Grow.zip file and put the resultant Grow.rb into the Plugins folder and the growCursor.png into the Plugins/Icons folder [just as they are zipped].
The attached skps have some tutorials on how to make a helical [spiral] stair and also helices in general...Grow.zipGrowHelicalSteps.skpGrowHelix.skp
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When making spiral steps there are often rules/codes to adhere to..
In the UK on narrower flights <1m [typically domestic or small commercial flights] you must have at least 50mm of plan-tread at the innermost part and the plan-tread on the centerline should be even for every step, and follow the rule 2R+G >=550mm <=700mm - where R is the Rise and G is the Going [plan-tread].
If you draw this in plan it limits the relative angle of adjacent nosings and effectively sets a limit on the taper angle between them = ~15degrees depending on the configuration etc...
For wider stairs you measure in from both edges [strings] 270mm and the same max/min pitch applies, 2R+G >=550mm <=700mm to the two locations
Any landings shall be the same length as their width measured along their centerline.
The minimum/maximum allowable Rise and Going varies with the building type too.
'Private Stair'[one dwelling] R >=155mm <=220mm and G >=223mm <=300mm [vertical pitch is also limited to 42 degrees - usually trapped by 2R+G rules]
'Institutional and Assembly Stair' R >=135mm <=180mm and G >=280mm <=340mm
'Other Stair' R >=150mm <=190mm and G >=250mm <=320mm
BUT AD-Part-M [accessible/disabled=all commercial/public building etc] R <= 170mm G >= 250mm
It's best to draw some test treads and place rotate a couple to see it they are right before committing to a complex 3D assembly...
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I have fixed the problems with
drawhelix13.rb.
It now allows turns that are not whole numbers...
Here it isdrawhelix13_TIGd.rb -
Nice information TIG.
Did you use another ruby for the stringer?
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No - it's made as a part of the tread and
Grown...
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Hi TIG, thanks a tremendous lot for your input
Greatly appreciated (Gaieus too b.t.w)
I did explain the spiral stair stuff though, see herehttp://forums.sketchucation.com/viewtopic.php?f=79&t=26214I'll give your attachments a whirl soon and post back.
Although I must say my last experiments with Goh's toolkit are promising. (I've not found how to change direction of rotation clockwise/counterclockwise though)
One advantage I see in using Goh's plugin is that the treads are more detailed i.e. the outside of the tread are 'curved' instead of straight.Nevertheless a couple of questions:
I'm native Dutch (Flemish) speaking, our stairmaker is French, and out here we're talking English, certainly with this kind of lingo I need some vocabulary helpLet me first paraphrase the layout of our stairs to be:
Hellicoïdal with hollow core with R=200 mm
Riser = 182,3 mm for V1
Riser = 189,2 mm for V2
Going = 230 mm (Giron in French)
LF = Ligne de foulée ~= "walkline" ~= plan-tread (??)
Plan-tread @ R = 650 mm -> V1 = 3/4T + 1/8T +107 mm
-> V2 = 3/4T - 70 mmI really think, in conjunction with what I learnt from the stairmaker, the best way is to draft a plan and side view (like the picture I posted before), and build your model from there, as I also found in a post from TaffGoh here http://forums.sketchucation.com/viewtopic.php?f=79&t=12511
I must say, although the ruby depot is a tremendous help, it's lacking responsiveness, and certainly for newcomers, clarity and a little more context.
E.g. most rb-scripts are already several years old and have often already been improved upon or contained within newer / other ones. Also a minimal documentation including ONE picture would often help to at least give an impression of what it's all about.One request remaining:
For clarity's sake and certainly for others researching this 'specialized' knowledge - would you mind drafting a quick SU image adding the lingo 'terms' to exclude misinterpretation?Thanks again for this great and responsive forum and all the help!!
Erwin
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@tig said:
I have fixed the problems with
drawhelix13.rb.
It now allows turns that are not whole numbers...
Here it is[attachment=0:1sjnwqr5]<!-- ia0 -->drawhelix13_TIGd.rb<!-- ia0 -->[/attachment:1sjnwqr5]Jeez, TIG you fix faster than I can think & write
))Erwin
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B.t.w How do I get URL's right??
That is: to not show up as the full URL, but as a 'clickable' word?
I've had a look [url]http://www.phpbb.com/community/faq.php?mode=bbcode/]here[/url], but this doesn't seem to work..
Allthough the one below DOES work ?@unknownuser said:
Linking to another site
phpBB BBCode supports a number of ways of creating URIs (Uniform Resource Indicators) better known as URLs.* The first of these uses the tag, whatever you type after the = sign will cause the contents of that tag to act as a URL. For example to link to phpBB.com you could use: [Visit phpBB!](http://www.phpbb.com/) This would generate the following link, Visit phpBB! Please notice that the link opens in the same window or a new window depending on the users browser preferences.Erwin
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@unknownuser said:
I'm native Dutch (Flemish) speaking...
Haha... We know that1s not the same (I had a Flemish room-mate when I went to an American univ. for a semester
)Anyway, for staircase building, TIG's Grow is definitely a good tool (and thanks TIG for a revised version or the helix plugin, too).
@lexje said:
B.t.w How do I get URL's right??
This is not the correct way:
[url]http://www.phpbb.com/community/faq.php?mode=bbcode/]here[/url]But do it like this:
[url=http://www.phpbb.com/community/faq.php?mode=bbcode/]here[/url]And the result will be this:
here
Edit: wow, does somebody read the FAQ???
You have a bright future here, my friend! (Just look at what our other moderator, solo has in his signature about this)
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Edit; wow, does somebody read the FAQ??? You have a bright future here, my friend! (Just look at what our other moderator, solo has in his signature about this) ;) As a matter of fact, I did search the FAQ, and it simply is not there (correct me if I'm wrong)Off course being the better than average user, I searched phpBB's faq for this... Hence..Solo doesn't seem to have too much of a Stoppelbaard
Erwin
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Hi,
I have just tried the plugin about Helix and it works perfectly!.
So I want to thank you, guys, for the script and the info.
Then I have a question:
I would like draw my helix/spiral giving the radius and the pitch information but I would like to decide the height of the spiral.
For example
In the image I have a fixed height 11590mm and in the whole height I have to build my helix. I have tried with some parameters in terms of radius and pitch (the radius is fixed as well) but it is smaller.
Any tips? -
Once the helix is made with the expected turns etc you can Scale it in the Z, typing in 1590mm [note the units 'mm'] - it then scales to that exact z-size rather than by a factor...
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Thank you TIG.
I have tried and it works.
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I'm currently working on a plugin that can produce a highly customizable curved or spiral staircase in SketchUp.
I hope to release it soon, but in the meantime, take a look at this page:
http://www.freesketchupplugins.co.uk/spiral_staircase.phpAs for a helix, I also have a tool that will make one. Unlike helix.rb or drawhelix13.rb, this will automatically give it a thickness based on a value you can specify. http://www.freesketchupplugins.co.uk/springtool.php
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Seems you have one inside 1001bits
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The plugin on 1001 bits is nothing to do with me. This one is freeware, not a trial:
http://www.freesketchupplugins.co.uk/springtool.php
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