In this session, we are going to create the indoor and outdoor stairs between B1F and 1F. We usually create stairs after all structural components. Since we have finished all of the structural components in both B1F and 1F, we may start to create the indoor and outdoor stairs in B1F. Let us start to create the outdoor stairs of B1F. Under the “Architecture” tab, find the “Stair” tool. Select “Stair by Component,” and then go to the “Properties” palette to select the stair type. Pick up “Outdoor RC Stair” here. According to the underlay, the run width of this stair is 208 cm. So on the “Options” bar, we input 208 into “Actual Run Width.” Open the “B1F” plan view. From the underlay, identify the center points of the first riser and the last riser. Then click on them sequentially to sketch the stair run. Under the “Modify | Create Stairs” tab, click the green check icon to finish creating the stairs. We can shift to the 3D view to examine the stairs that we just created. Next, since the default railing type is not the one needed, so we should modify it. Select the railing first. Then in the “Properties” palette, click on the type selector and select the railing type “Square Tube 110 cm.” In addition to the railing type, we need to adjust the position of the railings. In the plan view, select one of the railings first. Then under the “Modify | Railings” tab, click “Edit Path.” The railing is overlapping the column, and we shall align the railing path with the edge of the column. Click on the “Align” tool. Then select the edge of the column as the line reference for alignment, and then select the railing path to align. Now the railing is put into the right position. Following the same steps, let us adjust the other railing. We may go to the 3D view to see the complete outdoor stairs in B1F. Let us move on to model the indoor stairs in B1F. From the underlay, the indoor stairs are composed of four components: two runs and two landings. We will create these four components from bottom to top. Find the “Stair” tool under the “Architecture” tab. Select “Stair by Component.” Then in the “Properties” palette, pick up the stair type “B1F to 2F Indoor RC Stair.” Ensure the “Top Level” is set to “1F” and the “Base Level” is set to “B1.” Also, we need to change the “Actual Run Width” to 95 cm. Now, we may start to create the first run, which is between B1F and the first landing. From the underlay, we find the first riser and the last riser in this run. Click their center points sequentially to create the first run. The next step is to create the first landing. Under the “Modify | Creating Stairs” tab, select the “Landing” tool, and then select “Create Sketch.” We may use the “Rectangle” tool to sketch the boundaries of the first landing. Since the two landings should overlap, let us move the right-side edge to its right by 20 cm. First, click on the right-side edge. Then click on the “Move” tool. As we can see, a square is appearing on the edge. We drag this square to the right, and key in “20” to get precise displacement. Click the green check icon to finish editing the boundaries. For the second landing, please follow the same steps of creating the first landing. However, since Revit does not know the relative height between the first and the second landing, the default value of “Relative Height” is not correct for the second landing, and we should change that. “Relative Height” is the distance from base level to the top surface of the landing. After selecting the first landing in the “Properties” palette, we can see the “Relative Height” of the first landing is 166.76 cm. The second landing should be one riser higher than the first one, and we know the riser height of this stairs is 18.53 cm. Now, select the second landing. Go to the “Properties” palette, and in the “Relative Height” field, input formula “=166.76+18.53.” Then Revit will automatically calculate the value, which is 185.29 in this case. The last component is the other stair run. Let us follow the same procedure to model the stair run. Here we get a warning message: “The rail is not continuous.” Let us shift to the 3D view and use the “Section Box” to see what happened. As we can see, the railing breaks into several segments, so we shall edit the path of the railing. According to the underlay, we only need one of the railings, let us delete the other one. Then we select the remaining railing. In the “Properties” palette, change the railing type to “Square Tube 110 cm.” Under the “Modify | Railings” tab, select the “Edit Path” tool. Remove all the redundant segments and adjust the path to correct position. Now, let us shift to the 3D view to check the indoor stairs just created. In the 1F, nearby the elevator shaft, we need to model a set of stairs for connecting 1F and 2F. Since the type and height of the stairs are the same as those of the stairs in the B1F, we can directly duplicate the B1F stairs to 1F. Open the 3D view, use the “Section Box” to view the stairs, we can see the stairs from B1F to 1F. Select the stairs and, under the “Modify/Stair” tab, click “Copy to Clipboard.” Then in the “Paste” drop-down list, select “Aligned to Selected Levels.” In the pop-up window, select “1F.” Let us go to the 3D view to see the stairs we just created.
