In this session, I am going to show you how to use the Wall tool to create a wall in Revit. First, we have to know that there are two wall categories. They are the architectural wall and the structural wall. We choose the wall category based on whether the floor elements are structural member analytical models, like the way we choose floors. Here, according to the underlay, we choose the architectural wall. Under the “Architecture” tab, click on the. Then in the “Property Palette,” we can choose the wall type. For example, the thickness of the outer wall of this building is 20 cm. So we choose the wall type with 20 cm in thickness. In the previous lecture of creating columns, we’ve learned about how to set the constraining levels of a column by changing the settings on the “Options Bar.” We could select “Height” or “Depth” in this drop-down menu and specify the column height. Here we can do the same thing with the wall. This process also works for creating walls. But if you think this is not that intuitive, we can simply specify the base and top constraints in the “Property Palette.” For example, in the “Property Palette,” we set the “Base Constraint” to “1F” and “Top Constraint” to “Up to Level: 2F,” and set “Base offset” and “Top Offset” to zero. Then we will see the wall created like a column. Its base is on the first floor, and its top is attached to the second floor. Next, we can start creating a wall by specifying a start point and an endpoint. But note that, if we create walls in this way, it is important to ensure the wall is connected to columns if needed. If the wall is connected to a column, we should be able to see a square at the intersection of the two elements. Another way to create a wall is to directly specify its length. For instance, if we want to create a wall of 485cm long, simply click on the start point, and move the cursor toward the direction it needs to be extended. Input 485cm and press Enter to place the wall. If we want to change the wall’s orientation, simply press the spacebar to flip the wall. When we finished creating the walls, we may need to use the “Align” tool to align the walls with the column’s outer face. For example, go to the “Modify” tab and select the “Align” tool, then we align the wall with the face of this column. But it’s kind of troublesome to align all of them manually. So if we want these walls to automatically align with the faces of columns, we can simply change the default setting for the wall category during the creating process. Let me demonstrate this for you. On the “Options Bar,” in the “Location Line” drop-down menu, select “Core Face: Exterior,” and we can see the wall created aligning with the outer face of a column. There are still some frequently-used settings in the “Options Bar,” such as the “Chain” checkbox. If we check the checkbox, then we can repeatedly create walls in one operation and the wall elements we create will be linked together. Moreover, the “Offset” input field shifts the wall from its location line toward its perpendicular direction with the offset distance. This is useful whenever we don’t have a reference line or point to align with.