Explore the intricacies of creating a roof plan for a building, including understanding the scale, noting specific components, and acknowledging the importance of dimensions and details. Discover the crucial elements that make up a roof plan, such as the title block, keynotes, and legends area, and how they contribute to the overall structure of the design.
Key Insights
- A roof plan, which provides a top-down view of a building, shares many similarities with floor plans, including the same scale and the inclusion of elements such as a title block, revision bubbles, keynotes, and project numbers.
- Details on a roof plan include building section cuts, overall dimensions, and specific features such as skylights and different types of roof structures. These are often referenced to specific images or sheets for further information.
- It's important to note that a "flat" roof on a project is never truly flat but usually has a minimal slope of half an inch to a foot. This is particularly true for institutional and government projects where the accepted minimal slope is half an inch to a foot.
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Let's begin working on sheet A6.1, which is the roof plan for the building. A roof plan is when you're way up in the sky, looking down, and you can see everything that is daylighted below.
The scale of a roof plan is the same scale as we have on floor plans, and when you look at the sheet, you'll once again see a lot of similarities. Of course, in the title block, we have the sheet number, we have the sheet name, we have the revision bubbles, we have the project number and who drew it, we have our keynotes. Again, the keynotes are sheet-specific.
You can see that we have a bubble area. We have some notes for this drawing, and we also have a legends area, but in this drawing, there's really no information that really makes having legends necessary. When you look at the drawing, you can once again see the building section cuts.
Again, the building section cuts are referenced on all of the plan drawings. You can see some overall dimensions. For example, I'm seeing that it's 90 foot 7 inches from the end of here, up and over, down to the end of here.
Again, I'm just showing overall building information. And then when I zoom in in this area, you can start to see again the building section cuts. You can see the reference to some details.
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Again, if you want to see the parapet condition, you would go on sheet D7.4 and look at the appropriate image. We have our keynotes that are talking about the different kinds of roof structure we have going on, and then we also have over here a keynote for the skylight and also a callout that says to learn more about the skylight. Go look at image 2 on page D7.4. You can also see that we have a flat roof that's going on up here.
When I'm in this area, the roof is flat. Now, a flat roof is never truly flat. A flat roof usually has a slope, and so this roof has a minimal slope of a half an inch to a foot.
When you start dealing with projects like institutional and government projects, you'll find that they never truly have a flat roof. The normally accepted minimal slope is half an inch to a foot. So a flat roof is never truly flat.
You can see when I look in this area that I'm showing that I have my standing seam metal roof. You can see that I'm again calling out for a slightly more modest slope. And again, the reason this slope can be more modest is because this is a metal roof, and with a metal roof, I'm less concerned about water and or snow building up on a metal roof than I am on a bituminous type of roof structure.
When I look at the drawing, I can see some dashed lines right in through here. Again, what's happening is I have a parapet that's running down this edge of the building, and there's a recess below. So I'm showing the recess below on the roof.
We have again symbols that are going on here for section cuts through different details. And again, everything is very similar to what we've had going on before.