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Walls & Curbs

2.4_Walls & Curbs

0:01 Next on our grading to do list is walls and curbs.

0:06 Luckily, the grading plan shows that most of the walls are flat with a few sloped ones connecting the different park levels.

0:17 Let’s start pulling up our flat walls first.

0:24 The long wall next to the upper walk is two feet high from finished grade.

0:31 Then the other flat walls are 6 inches up along the middle walks so really, more like curbs on this side.

0:46 For walls that don’t have spots called out, it means they sit flush with their adjacent walks or plazas.

1:21 So that should do it for our flat walls.

1:24 Let’s now look at the few that slope.

1:28 Starting with the two flanking the slide and stadium seating, let’s assume a consistent slope and a height of 6 inches from the bottom.

1:38 Like most things in SketchUp, there are several ways to do this.

1:42 We’re going to aim for the simplest way by extruding the wall up to meet the height of the others behind which is 3 feet 6 inches.

1:50 Then, since we want the bottom to be 6” high, we’ll select and move the front edge down 3’.

2:05 You’ll notice that this splits the top face in two.

2:08 We’ll just use the eraser tool and while holding shift, hide that edge.

2:18 Let’s try the same technique for the wall on the other side of the slide.

2:23 One thing that I’ve found is that sometimes you have trouble lowering an edge if it's perpendicular edges are broken up into smaller line segments.

2:32 If this is the case, then we can just delete th

2:40 Then we should be able to select the edge again and move it down this time.

2:46 Let’s move onto the walls flanking the steps now.

2:51 We’ll do the same thing by extruding the walls up to their top height first.

3:04 Then erase any stray verticals that might have come up with it…

3:17 ...and this time move the front edge down ‘4.5’ feet in order to leave the wall 6 inches above the walk like the others.

3:41 Just a note that even with good CAD drafting, you may find yourself with a particularly troublesome wall or edge.

3:58 Here we may have no choice but to take it as far as we can...and then redraw any trouble some edges...and delete any geometry we don’t want.

4:11 For this particular wall, I’ve redrawn the bounding edges but am missing the top face now.

4:19 So I’ll just select the bounding edges and run Sandbox ‘From Contours’ on it.

4:26 Then I can explode it and we’ve got our top face back.

4:31 It’s actually a good thing that I ran into some trouble with my model here as it allowed me to demonstrate that a variety of different techniques can and should be used to accomplish your tasks.

4:45 Next, while not really a wall, let’s do the slope on either side of the slide.

4:51 This can be done using the Sandbox ‘From Contours’ method.

4:55 We just need to copy the back edge of the face up to the top walk elevation.

5:05 Then, with that edge still selected, select the bottom edge and then click the ‘From Contours’ icon.

5:16 I’ll do the same for the one on the right.

5:32 Then sample and apply the same material from below.

5:41 Now that the easy ones are out of the way, let’s do the more challenging one.

5:46 And by challenging, it’s not that it’s difficult, it’s that it’s not clear what the best approach is to use to make it.

5:54 Let’s start by going into the walk group that defines the curved slope that we want our wall to follow along.

6:01 This is the tricky part…rotating around and selecting so that we only get the just the edge selected that we want.

6:10 Hold shift to add to the selection.

6:14 Then with the all of the edges selected, copy them.

6:19 And then hop back into the walls group and paste them in place.

6:24 You don’t have to do this next step but it’s usually best to group things in order to keep them separate from other geometry.

6:31 We can always explode it later if desired.

6:37 So with the copied walk edge grouped and inside the walls group, we can now draw a 6” by 6” square along the face of the stair cheek wall.

6:47 You may have heard a key word earlier when trying to choose the best method to create this wall – given that want it to follow both the curve and the slope of the walk at the same time.

6:59 So we’ll want to use the ‘Follow Me’ tool for this.

7:02 In order to get the best results from 'FollowMe', it sometimes helps to first use an extension called ‘Weld’ that joins separate edges or lines together into one

7:13 Select all the edges again and then go to ‘Extensions/Weld’.

7:20 Now we're dealing with one long connected line.

7:24 Now we can use the ‘Follow Me’ tool.

7:28 Select the line first…then the ‘Follow Me’ icon…then the curb face.

7:35 And that’s it. Hopefully it's a lot easier than you were expecting.

7:45 Lastly, we can use the same ‘Follow Me’ technique for the remaining two sloped curbs.

7:52 Since the process is the same, we’ll speed the video up here for a minute.

9:08 As you can see, that’s it for walls and curbs.

9:13 Now it is time to move on to landscape grading in the next lesson.