Autodesk Revit Architecture 2011 No Experience Required - part 35 ppt

Chapter 7 • Roofs 314 Creating a Sloping Roof To begin the process of creating a sloping roof, we will cap off the west wing of our building. The exterior walls used for the perimeter need to be altered. You are already a pro at this, so let’s start right there: 1. Go to a 3D view. 2. Select the west wing exterior walls, as shown in Figure 7.38. 3. On the Properties panel select Exterior - Brick And CMU On MTL. Stud (No Parapet), as shown in Figure 7.38. FIGURE 7.38 Changing the walls to Exterior - Brick And CMU On MTL. Stud (No Parapet) 4. In the Project Browser, go to the West Roof floor plan. 5. On the Home tab, select Roof ➢ Roof By Footprint. 6. On the Draw panel, select the Pick Walls button. 7. On the Options bar, uncheck Defines Slope. 8. Type 1 ′–0″ for the Overhang value. Creating a Sloping Roof 315 9. Move your cursor over a wall. Make sure the overhang alignment line is facing outside the walls to the exterior. 10. Press the Tab key on your keyboard. All of the walls will be selected. 11. Pick the wall. The magenta lines are completely drawn in. Your sketch should look like Figure 7.39. FIGURE 7.39 The perimeter of the roof is set. Now it is time to set the slope. The objective here is to slope the roof starting at the northeast corner (as the low point) and ending at the southwest corner (the high point). This is done by adding a slope arrow: 1. On the Draw panel, select the Slope Arrow button, as shown in Figure 7.40. FIGURE 7.40 Clicking the Slope Arrow button on the Draw panel Chapter 7 • Roofs 316 2. Pick the corner at the upper right and then the corner at the lower left, as shown in Figure 7.41. 3. Press Esc. 4. Select the slope arrow you just added to the model. 5. In the Properties dialog, under Constraints change Specify to Slope. 6. Under Dimensions, change Slope to 3 ′ / 12″ (see Figure 7.42). 7. Click Finish Edit Mode on the Modify | Create Roof Footprint tab. FIGURE 7.41 Adding the slope arrow FIGURE 7.42 Changing the Slope Arrow properties Creating a Sloping Roof 317 Again, we have a view range issue. You can see only the corner of the roof that sits below the cut plane. You can change that with the view range: 1. Press Esc to display the view properties in the Properties dialog. 2. Scroll down the list until you arrive at the View Range row. When you do, click the Edit button. 3. In the View Range dialog, under Primary Range set Top to Unlimited. 4. Set the Cut Plane Offset to 40’–0” (see Figure 7.43). 5. Click OK. You can now see the entire roof. 6. Go to a 3D view. You now have a cool, sloping roof, as shown in Figure 7.44. FIGURE 7.43 Setting the view range FIGURE 7.44 The sloping roof Chapter 7 • Roofs 318 Of course there is a wall issue. You can attach most of the walls to the roof simply by selecting them and attaching the tops. You will, however, have to modify the profile for one wall: 1. In the 3D view, select all of the exterior west wing walls, excluding the one on the east side that is west of the corridor (you can see it in Figure 7.45). 2. On the Modify | Walls tab, select Attach Top/Base. 3. Pick Top from the Options bar (it is all the way to the left). 4. Pick the sloping roof (see Figure 7.45). 5. In the Project Browser, go to the section called West Corridor Section. 6. Select the wall that does not attach to the roof. 7. On the Mode panel, click Edit Profile. 8. Trace the roof with the line tool. Be sure you delete the magenta line that established the top of the wall. 9. On the Sketch tab, click Finish Edit Mode. You now have all of the walls joined to the roof. Right now would be a good time to check out the roof in 3D just to make sure the results are pleasing to you. 10. Save the model. FIGURE 7.45 Attaching the tops of the walls to the sloping roof Roofs by Extrusion 319 The next item to tackle will be creating a roof by extrusion. This is where you can design a custom roof. Roofs by Extrusion Creating a roof by extrusion is almost always done in an elevation or a section view. The concept here is to create unique geometry that cannot be accomplished by simply using a footprint in plan. A barrel vault or an eyebrow dormer comes to mind, but there are literally thousands of combinations that will influence how our roofs will be designed. To get started, the last roof left to be placed is the south jog in the west wing of the model. This is the perfect area for a funky roof! The first thing to do is to change the three walls defining the jog to the Exterior - Brick And CMU On MTL. Stud (No Parapet) wall type: 1. Go to a 3D view. 2. Select the three walls that comprise the jog in the south wall, as shown in Figure 7.46. 3. From the Properties dialog, switch these walls to Exterior - Brick And CMU On MTL. Stud (No Parapet), as shown in Figure 7.46. FIGURE 7.46 Changing the wall types as we have been doing all along 4. Go to the Level 1 floor plan. 5. On the View tab, select the Elevation button. 6. In the Properties dialog, be sure the elevation is a Building elevation (you are given the choice in the drop-down menu at the top of the dialog box). Chapter 7 • Roofs 320 7. Place the elevation as shown in Figure 7.47. 8. Pick the view extents (the blue grips at the ends of the elevation), and drag them in so you can see only the west wing. 9. Make sure you pull the view depth window back to see the wall beyond (see Figure 7.47). 10. Change View Scale to 1/2 ″ = 1′–0″. 11. Change Detail Level to Fine. 12. Change View Name to South Entry Elevation. 13. Click Apply. 14. On the Home tab, select the Ref Plane button; then, in the Draw panel, click the Pick Lines button. FIGURE 7.47 Adjusting the view 15. Set Offset to 1′–6″. 16. Pick the southmost wall and offset the reference plane away from the building (see Figure 7.48). 17. Press Esc twice to clear the command. 18. Select the reference plane. 19. In the Properties dialog, change the name to South Entry Overhang. 20. Click Apply. 21. Open the elevation called South Entry Elevation.  After you place the elevation, you will have no idea where the view is extended to. Is it to the end of the building? You just don’t know. If you pick the elevation arrow (the part of the elevation marker), you can then grip- edit the elevation to see what you need. Roofs by Extrusion 321 FIGURE 7.48 Adding a reference plane The importance of that reference plane you just added becomes obvious at this point. You needed to establish a clear starting point for the roof you are about to add. Because the roof will be added in an elevation, Revit does not know where to start the extrusion. This reference plane will serve as that starting point. 1. On the Home tab, select the Roof ➢ Roof By Extrusion command, as shown in Figure 7.49. 2. When you start the command, Revit will ask you to specify a refer- ence plane. Select Reference Plane: South Entry Overhang from the Name drop-down list, as shown in Figure 7.50. 3. Click OK. 4. In the next dialog, change the Level setting to Level 3, and click OK. 5. In the Home tab, select Reference Plane as shown in Figure 7.51, then click the Pick Lines button. 6. Offset a reference plane 3 ′–0″ to the left and to the right of the exte- rior walls, as shown by numbers 1 and 2 in Figure 7.51. 7. Offset a reference plane 4 ′–0″ up from the top of the wall, as shown by number 3 in Figure 7.51. 8. In the Properties dialog, click the Edit Type button. 9. Click Duplicate. 10. Call it Canopy Roof. While you are in Sketch Mode, when I tell you to click the Roof Properties button, you need to click the Roof Properties button on the right, not the one on the left. They are two different properties. O Chapter 7 • Roofs 322 FIGURE 7.49 The Roof ➢ Roof By Extrusion command FIGURE 7.50 Selecting the South Entry Overhang reference plane 11. Click the Edit button in the Structure row. 12. In the Edit Assembly dialog, change the structure thickness to 4 ″, as shown in Figure 7.52. 13. Click OK twice to get back to the model. Roofs by Extrusion 323 FIGURE 7.51 Adding reference planes to use as construction lines FIGURE 7.52 Changing the thickness of the canopy roof . Properties panel select Exterior - Brick And CMU On MTL. Stud (No Parapet), as shown in Figure 7.38. FIGURE 7.38 Changing the walls to Exterior - Brick And CMU On MTL. Stud (No Parapet) 4. In the Project. have no idea where the view is extended to. Is it to the end of the building? You just don’t know. If you pick the elevation arrow (the part of the elevation marker), you can then grip- edit. point for the roof you are about to add. Because the roof will be added in an elevation, Revit does not know where to start the extrusion. This reference plane will serve as that starting point.