Non-horisontal roof ridge

[Anonymous]

Hi.

I'm struggling with how to make a roof ridge that is not horizontal. I'm just beginning this BIM model and will naturally be working on it for the next 2-3 years so the solution has to be practical in terms of future skylight, sections...

What is the best way to approach this?

[Erwin Edel]

Unless the gutter is sloped as well or your building footprint is not a rectangle, you will have to bend or curve the roof planes to do that.

If you do want a sloped gutter or a trapezium footprint, the ridge will be sloped.

Build your model with cardboard and you will see how the roof planes work.

[Anonymous]

There should be no need to curve that roof...

[Erwin Edel]

If you want to re-invent the rules of geometry, I'm not stopping you

[Anonymous]

But I'm not inventing anything... The roof is flat.

[Erwin Edel]

Your roof pivot lines need to form a trapezium shape, that is the only way you will make that shape, without splitting that triangle in to two triangles or twisting the roof in to a curved shape.

[runxel]

I'd just like to drop the Mesh to Roof command.
Might be helpful here.

[Anonymous]

Thank you, both of you.

I was hoping there would be a solution where I could use the multi-plane roof, and easily adjust the angles as the project develop. It seems I have to use single-plane roofs, which is OK, but a bit more work...

[Stephen Dolbee]

If your roof planes are not parallel with each other, your ridge will not be horizontal. It will slope up or down.

[Anonymous]

Yes, the multi-plane does that...

Unfortunately the moment the footprint becomes something else than a rectangle the top ridge point is un-movable? That is very inconveniant at such an early stage...but probably because of geometry constraints.