How to draw geometrical Staircase?

[nicolas]

Hi,

 

Is there anybody who has any experience drawing geometrical staircase? esp. the waist and soffit. The waist is supposed to be 150 mm.

 

Help is greatly welcomed. Thanks.

Geometrical Staircase.dwg

[ReMark]

I believe that is referred to as a winding or spiral staircase.

 

What material will be used for the stairs? Wood, steel, concrete, a combination of materials, other?

 

Are you going to do this in 2D or 3D?

 

I would suggest that you do a search here for "spiral stairs". This topic has come up several times in the past.

Edited December 4, 2014 by ReMark

[BIGAL]

Something like this ?

 

[nicolas]

The staircase is to be made of Reinforced Concrete with a waist of 150 mm (6 inches). The issues is the waist/soffit.

 

I don't think it is a spiral staircase which is round a central pillar. This one is fixed to the wall, a foundation to the first step and a beam holding the last step which is generally the slab above.

 

Thanks

[steven-g]

There are specialist programs out there that are designed for this sort of thing, usually an engineer has to work out the strengths and reinforcing steel, the program used here is Tecla structures, I wouldn't advise doing the work without calculations. Having said that I occasionally get requests to drww out the shuttering boards for staircases and attached is one of the methods I would use, but this is basically guess work.

Geometrical Staircase.dwg

[ReMark]

There was a thread about doing a similar type of concrete staircase (it happened to be a spiral) posted a while back. Do a search, like I suggested, and I'm sure you'll find it.

[BIGAL]

The one I posted is actually a single block copied, rotated, moved vertically. You could do the same for a concrete stair it just means working out the correct single concrete tread in 3d, like others you would need say min 100mm below tread for reo but it must be engineered, a Italian designer is famous for his concrete stairs including doubles, it will come to me.