Discover the process of establishing low point elevations and ridge elevations, and understand how the roof will slope. Learn how to adjust all high point elevations around the perimeter of the roof and the ridges, and examine the impact of these adjustments in 3D perspective and section views.
Key Insights
- The initial step in roofing involves establishing low point elevations and ridge elevations, and then determining how the roof will slope.
- Adjusting the high point elevations around the roof perimeter and the ridges can be efficiently performed by selecting the roof and using the modify sub element option. These adjustments become evident when viewed in 3D perspective.
- The roof section's structure can be modified to accommodate tapered insulation that slopes, resulting in a thicker roof section that is flat across the bottom. This modification significantly impacts the sectional view of the roof but has no impact on the 3D view of the roof's top.
Note: These materials offer prospective students a preview of how our classes are structured. Students enrolled in this course will receive access to the full set of materials, including video lectures, project-based assignments, and instructor feedback.
This process here is going to be two steps: the first will be establishing our low point elevations and our ridge elevations. And then the next thing that we do is we'll determine how we want the roof to slope. If I just go in and modify the roof right now, what it'll do is it'll slope the entire roof itself, but we can tell it to only slope within one of the sections of the assembly of the roof, which is what we're going to do in this case.
And so we'll set the elevations first, take a look at it in section, and then we'll jump over into the roof properties and review what we can do to make it stay flat on the bottom or if we want to keep it sloped. And so first things first, we'll need to adjust all of our high point elevations, which we can do by selecting the roof and going to Modify Sub-Elements. And so we want to have all of the points around the perimeter of the roof and all of these lines here, the ridges, to have the same elevation.
And so what I could do is I could select all of these here and I could do it all at the same time because it just makes it easier that way. Then I'll go down the middle and at those two grid lines. So these are the high points for our roof here.
And so I'll set that elevation to one foot, three and three eighths of an inch. And then I'm going to set these here, which are our drain elevations, to four inches.
And so if we look at this in 3D now, we'll see that the roof has some slope to it with these being the low points all the way around. And so if we were to look at this in section now, I'm going to copy this one over. So it's at a low point, and you can see the whole roof diaphragm is sloping, which would be common if this was a steel building because then we'd have it sloping at the steel.
Learn Revit
- Nationally accredited
- Create your own portfolio
- Free student software
- Learn at your convenience
- Authorized Autodesk training center
But then we'd also not want to have low points away from our columns there because that would just not be good. And so what I could do is I could go in and I can modify the section of the roof. So I can say edit type here and edit the structure.
And I can say that I want the insulation to be a tapered type insulation that slopes. And then I can check variable here. And what that'll do is it'll actually have it sloping, leaving the structure elements to be flat.
So I'll click OK to get out of that dialog. And now you can see the whole roof section is much thicker because the whole thing has to accommodate the slope there, but it's all flat across the bottom. When we look at it in 3D, it really has no impact on the roof surface.
But it certainly does when we look at it in section.
