Hello Gentlemen,
Are you familiar with the geometric method on the drawing board to make a helical staircase stringer and the plan and elevation tracing and development of the piece?
Height 100 cm
Pitch 100cm
Rectangular section 20 by 10cm
Thank you in advance
Kind regards
Hello
Some links found:
http://lionel.ponnelle.pagesperso-orange.fr/Balancement_herse.htm
http://philippe.berger2.free.fr/Bois/Systemes%20Constructifs/Escaliers/les_escaliers.htm
From a question about Lynkoa here:
http://www.lynkoa.com/forum/solidworks/escalier-14-tournant-et-autre
Hello
Be a little + precise in your request, make us a sketch for example.
My descro classes are far away unfortunately, but you have to find it on the net...
Hi @ Alain, it's all links that have already been provided on the site
some of whose questions have not yet been resolved
but the gentleman asks for the geometrical method of tracing on a plate
http://lionel.ponnelle.pagesperso-orange.fr/Escalier_colimacon.htm
@+ ;-)
Here is a file made with my SpaceClaim,
But I would like the geometric method, plan, elevation and development on the drawing board.
In the meantime, thank you
David
@ David if you look at my previous message you have a spiral staircase link in 2 D
repetition.........
http://lionel.ponnelle.pagesperso-orange.fr/Escalier_colimacon.htm
@+ ;-)
See this link also
https://www.google.fr/search?q=plan+escalier+helicoidal&rlz=1C1CHFX_frFR512FR512&tbm=isch&tbo=u&source=univ&sa=X&ei=jpw6U5LFIcW_0QXFm4CQDA&ved=0CDAQsAQ&biw=1101&bih=770
@+ ;-)
Another link:
http://lionel.ponnelle.pagesperso-orange.fr/Escalier_colimacon.htm
@ Alain
you wrote
1 April, 2014 - 13:43 | /!\ Report abuse
Another link:
http://lionel.ponnelle.pagesperso-orange.fr/Escalier_colimacon.htm
I put exactly the same link 2 and 4 discussions + top ;-)
@+ ;-)
in fact it is a rectangel triangle that wraps around a cylinder
the base of the rectangle makes Diam cylinder x Pi x nb turns
Height is the total height of the staircase
So all you have to do is convert the linear coordinate system into a circular coordinate system
Hello
The development of a spiral staircase stringer is a parallelogram, nothing more.
The angle between the sides is equal to the slope of the stairs. The length of the short side is equal to the height of the section. The one on the long side to the length of a helix coil x the number of turns.
For a thin sheet metal, it doesn't matter where the measurement is. For a thick section like in your example, you have to take the neutral line (about in the middle of the thickness but this can vary depending on the material).
The easiest way is to measure it directly on your CAD since it works. Otherwise, if you really want to do it by hand, wikipedia is your friend:
http://fr.wikipedia.org/wiki/H%C3%A9lice_%28g%C3%A9om%C3%A9trie%29
Since you have a CAD, I don't think you really wanted to draw a helix in plan by hand?
To check your development, just roll up the sheet on itself...
Edit: I hadn't seen jfaradon's answer but the method is interesting too.