Loft problem

[lutcus]

Hi,

I really need help. I have two 3d plines and I need surface. I try to make it with LOFT command, but it's not working.. please help me, or show me another solution.

thanx!

3d-loft.dwg

[ReMark]

You're right, Loft doesn't work.

 

I tried using Rulesurf but with only the two profiles the result was less than satisfactory. I think you would need at least one more profile in-between the two that you currently show.

[lutcus]

3d-loft.dwg

 

i added dwg with staircase i try make in 3D. And I need to have bottom surface (to slice later).. so, have an idea how i could do it?

[ReMark]

First. That set of stairs would now be considered illegal by most building codes because of the triangular stair treads.

 

Second. What bottom are you trying to slice? The bottom of each riser?

Edited December 20, 2010 by ReMark
spelling

[lutcus]

First. That set of stairs would now be considered illegal by most building codes because of the triangular stair threads.

 

Second. What bottom are you trying to slice? The bottom of each riser?

 

I trying to slice the solids with surface between two yelow lines..and I can't to make the surface with loft command. Maybe there are another way to make this staircase in 3D?

 

By the way, it will real staircase in Sweden. I just try to make the geometry for manufacture.

[ReMark]

I still think you'll need a third profile or cross-section between the two that you currently show.

 

The set of stairs is dangerous and should not be built the way you have it shown.

 

OK...I got it to work. On ONE riser...so far. When I try it on the full set of stairs I get the error "Modeling Operation Error: Face has more than one loop. The selected entities are not valid."

 

So my suggestion is to do it one stair at a time. I still think the stairs should be redesigned.

[lutcus]

I still think you'll need a third profile or cross-section between the two that you currently show.

 

The set of stairs is dangerous and should not be built the way you have it shown.

 

OK...I got it to work. On ONE riser...so far. When I try it on the full set of stairs I get the error "Modeling Operation Error: Face has more than one loop. The selected entities are not valid."

 

So my suggestion is to do it one stair at a time. I still think the stairs should be redesigned.

 

Did you make the surface? of my 2 yelow lines?

[ReMark]

Please pay closer attention to what I posted. See the word ONE in bold letters?

 

Yes, I made ONE surface and was able to slice the bottom off the top stair. I had to change the slicing plane to make the result look better. I used a ruled surface to do it.

[ReMark]

Here is what I did. You can see the modification in the middle object that I made to the profile on the outside of the stair. There was also a mnor modification to the inside profile.

 

I used 3Dpolylines for my profiles.

 

[ReMark]

This is the result as a solid.

 

[lutcus]

Thank you ReMark for investintment of you time. i make it in this way: 3d polylines-loft surface-slice surface from solids- and I have the results I need.

staircase.pdf

[ReMark]

I'm glad to hear that you have the results you need but I see you did not change your design. Unless you are modelling an existing staircase your design is inherently dangerous and it also impedes two-way use. The contractor who builds this will put a lot of time and effort into some stairs that are barely usable. Please reconsider what you have done and change the design to make it safer and more usable.

[lutcus]

I'm glad to hear that you have the results you need but I see you did not change your design. Unless you are modelling an existing staircase your design is inherently dangerous and it also impedes two-way use. The contractor who builds this will put a lot of time and effort into some stairs that are barely usable. Please reconsider what you have done and change the design to make it safer and more usable.

 

ReMark, I know what do you mean about "dengerous triangle stair-step", but I'm not architect of this Sweden project. I just desing the structure of this staircase (reinforcement and geometry detailing for manufacturing). And I'm in Lithuania, not in Sweden and I really do not know the code of sweden..so.. I just do my job..

[ReMark]

You would be doing your job by pointing out how inherently dangerous the design is not to mention how inefficient it is too. Despite how wide the stairs are, some of the steps are really less than half usable because they are triangular in shape. The tendency for most people is to stay to the right when going up and down stairs. Imagine doing that here.

 

If you saw that a situation was dangerous would you not point it out to someone?

 

You're company better hope no one ever gets seriously injured or killed using these stairs because some high powered law firm is going to sue everyone invloved with the project.

[lutcus]

We asked about this problem for sweden architect. They know it and they said it's ok for customer of this house. So..