In this video, Jim shows examples of plumbing drawings on a construction project. Jim explains that plumbing drawings may be drawn by the mechanical engineer, and are typically used by the project’s plumbing contractor to lay out and install the water and drain lines and the plumbing fixtures.
- [Instructor] Okay, we're back here on our cover sheet. In this video, we're going to take a look at the plumbing drawings, but while we're on the cover sheet, I want to point out one more thing before we move forward, and that is that I have a separate set of drawings called fire protection. In this case, fire protection refers to the fire sprinklers that are inside of this particular building. Again, sometimes those will be lumped into the plumbing drawings, because they're sprinkler lines. They carry water. Other times like this, you'll see them as a separate set of drawings.
Again, this is just one of those things to remember that as the project becomes more complex, they might continue to break things out of the drawings just to give you less information on a page. So in this case, instead of putting all of the first floor plumbing on the same page as the first floor sprinklers, which gets really cluttered, they've elected to break them out into a separate set of fire protection drawings. With that explanation, let's go ahead and use our hyperlinked sheet to jump to the first sheet in our set of plumbing drawings, P-101, and take a look at what information we have here.
If we zoom in, what we start to see here, since we are down on the basement level, is things like our hot water heaters. In this case, we have some storage tanks, because we're using solar hot water on this particular project. We start to see some lines. This is a dash line which would indicate that this is a line that is underneath our basement slab, and you can see there is a two-inch penetration coming up through our slab.
We have the up notation, so again just keep in mind those, what those different line styles mean as we walk through here. Let's go to the next page. You can start to get a little clearer picture of what these plumbing drawings are showing us. Now we're up on the first floor. You can see we're in the kitchen, and this is what appears to be the sink, and you can start to see fixture connections with piping that run in between the different plumbing fixtures.
Again, understand that what the designer is trying to convey is the way they want all of these lines connected. In this case, it says the line that we're looking at is the four-inch sanitary drain. DN stands for drain. The other term for sanitary drain would be the sewer system, so this is how the sinks are going to drain, and how that drain connects to this sink, this bathtub and the sinks and the toilets in the bathroom that is adjacent to the kitchen.
Again, these are more diagrams that show us how to connect to these fixtures. If I want to know precisely where these fixtures are located, I go back to the architectural drawings. This is another example of a set of drawings that's typically only going to be used by the plumbing contractor. I want to go ahead and walk forward to the last sheet in our plumbing drawings which is a, sort of, detail sheet. I want to point out a couple of things here.
One is another one-line drawing just like we saw in our electrical plans. In this case, it's the sanitary piping riser diagram. It's obviously not to scale and this just shows us the flow of how all of these pipes are connected, and how they eventually home-run and go to the city's sewer system. Just another example of a one-line drawing, in this case, used on the plumbing plans.
I also want to scroll up here, and you'll notice on this sheet the plumbing drawings seem to make extensive use of these tables, also known as schedules, and I'm going to come back and talk about precisely how to use the information in these schedules in a video in the next chapter. So we'll come back and look at what this information means on these schedules. With that, we're really finished reviewing our different drawing types. What we've covered here are really the basic drawing types present on most buildings.
Just keep in mind that as structures get more complex, there might be more and more types of drawings as the designers attempt to separate that information, so we don't get the pages cluttered to a point that they become unreadable. Remember again, I said this several times, this means that you might have to take some time flipping through pages to really understand all the different aspects of what's being built. With that, I want you to stay with me, and we're going to move to the next chapter and get further into the details.
In this course, learn how to read construction drawings. Jim Rogers helps you acquire this important skillset by taking you through the different components that make up construction plans, and helping you understand the language of construction drawings. He covers types of views, highlights different kinds of construction drawings—including architectural drawings, electrical drawings, and plumbing drawings—explains how to read general notes, and more.
- Deciphering the language of construction drawings
- Understanding line types
- Reviewing plan views, elevation views, section views, and isometric views
- Reviewing architectural drawings, structural drawings, and mechanical drawings
- Drilling down to the details
- Reviewing reference points on drawings
- Understanding schedules
- The future of construction drawings