Jim explains that schedules can be used in a set of construction drawings to convey a list of information and specifications in a table format. Schedules can be an efficient way of grouping information such as a list of the doors, windows, or mechanical, plumbing, or electrical fixtures.
- [Instructor] As we've stepped through our different drawing types I've pointed out several different examples of tables or schedules of value that contain information that we need to build this structure. Now these schedules are just another way that the designer can present information to us. And sometimes a schedule or a table really is the most organized way to present that information to us. So let's go back and look at some of the schedules on our plumbing drawings that we found on sheet P 601. I'll go ahead and open up my Bookmarks and navigate here to 601, our plumbing risers and schedules sheet.
Again, remember that these schedules on the plumbing drawings present very specialized information that generally only means something to the trade who is doing this work, in this case, the plumbing company. But let's look at some of the information you can find if you know what to look for. So we're going to go ahead and zoom in on the Plumbing Fixture Schedule. And you'll see here that there's a unit number, in this case we're going to look at P-3, and that indicates that this is information about a tub, or a bathtub. So back on our plan view there should be a bathtub that says this is bathtub number P-3.
We come to P-3 in the schedule and we can find several different pieces of information. CW indicates that the cold water line that leads to this tub is a 1/2 inch pipe, the hot water is a 1/2 inch pipe. The waste or drain line is a two inch diameter pipe. And then there's an inch and 1/2 vent that probably goes up through the ceiling. So, again, nice organized way to provide information that's not probably otherwise shown in the plan view. So we need to consult the schedule to find these dimensions out or this information out.
Let's go ahead and scroll over and look at one of the other schedules here for, oh, any of these, the Mixing Valve Schedule, or the Expansion Tank Schedule. You'll notice here that there's a column that says manufacturer and model number. So in this case the designers actually listed a model number, a manufacturer for this valve and for these tanks. This is, again, important information to consult, because it's what you have to supply to this project. If you want to supply something different, because you think it's equivalent, then you would have to get the designer's permission in order to do that, because they've specified this particular manufacturer and model number.
So, again, this is the kind of information you can find in these tables or schedules of values. Now I also previous pointed out a window and door schedule back on sheet A 601. So let's go back and take a look at that too. We use our Bookmarks to navigate through our architectural drawings and jump again to A 601, window and door schedules. So here you can see first on this side of the page that we have a detail that shows us different window types and each one of these window types has a call out underneath it.
This is window type A, this is window type B, this is window type C, and next to that is a Window Schedule. This Window Schedule gives us more information about each one of those window types. So, for example, that window type A has a frame size that's three foot by five foot five inches. It tells us that it's a double hung window, the frame is fiberglass, and then this is information that tells us about the glass that goes inside that window.
Also, you notice there's a column that says notes, so note 1, 4, 5, 7, and 8 all pertain to windows type A. If we go down here we can see that some of these notes are specific about a particular window or a particular location of window type A. So under type A we have a note number 4. If we come down here to note number 4 it says the window in bedroom number 4 must have tempered glass.
So, again, you really need to pull all of this information together, because what they've done here at first glance is they've made it look like all of the window type As are double hung, fiberglass windows with this type of glass, but then they threw us a little curve ball here with note 4 and said, oh yeah, except for that one in bedroom 4 and it needs to have tempered glass. So, again, make sure you follow everything through to conclusion. If there's a note make sure you look it up and understand how that might affect what you're supplying to the job or installing at the job.
Now speaking of supplying parts and pieces, you'll notice also in this Window Schedule they're nice enough to give us quantities, so there's 13 type A windows, there's 7 type B windows. Now I'm going to tell you that this is nice and the designer has used this to identify whether or not they've got enough paths in and out of the building for emergency access and that type of things, that's what this column meets egress requirements means, but as a contractor and as somebody bidding this project it's really not a good idea to rely solely on the quantities in this schedule.
Should they be right? Yes, they should. Are they always right? No, they're not. Sometimes they get miscounted. So as a contractor, especially when I'm pricing this job out or getting ready to order materials, I'm always going to go to my plan view and I'm going to count up my own number of type A windows and type B windows and so forth, and if those happen to match the quantities in this schedule that's great, that gives me some validation that I counted correctly. If they don't match it tells me I need to go back and look again and make sure that I didn't miss anything or make sure that the designer got their quantities right in here.
And again, you always want to compare that information and verify before you go ordering materials or giving a price to somebody for the materials on the project. So hopefully, as you can see, these schedules are really just another way for the designer to present us with information. And again, as you can see in some of these tables, it is a very clear and concise way of presenting this information, rather than putting more and more notes in our plan view on the drawing. Now keep in mind that, for example, this particular schedule might contain notes about all the windows, it's also possible that there are notes throughout the project that alter some of this information.
We looked at one example here right in the schedule where note 4 alters the glass in the window in bedroom 4 and we might also have some information on the plan sheets that isn't shown here in the schedule, but on the plan sheet they say, oh yeah, by the way, this window gets this type of glass. So, again, you just need to correlate all this information and don't forget about the project specifications. When we start talking about parts and pieces, like plumbing fixtures, doors, windows, handles, that type of thing, always remember that in addition to this information you need to go back to that project spec book and read through the text there and see if it gives you any more additional information about what needs to be supplied.
So, so far I've shown you where to find information on the drawings that were created by the design team, so that includes these construction drawings and the project specifications, but if you remember back when we looked at the general notes we saw a note that stated that we were to follow the truss manufacturer's shop drawings. But if I go ahead and zoom back out and navigate to our cover sheet with our drawing index you notice I don't see anything here that's call shop drawings.
So stick with me and let's move to the next video and figure out what that means and where I'm going to find these things called shop drawings.
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