Work with slab edges

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A slab can be attached to a structural foundation slab or floor.

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The slap edge geometry is defined within a profile family

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which allows for a wide range of shapes to be accommodated

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in the

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image shown to the right.

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You can see that a slab edge has been added to represent a thickening.

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The slab edges can have a vertical and horizontal

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offset from the horizontal edge that you select.

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It is worth noting that a slab edge cannot host

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reinforcement bar and will not have an analytical model.

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If this is a requirement, then it is recommended that you use a structural beam.

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However, for simple slab edges, you can host a reinforcement bar into the slab.

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In this video, we're going to use the slab edge tool to add some

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shavers around the edge of the core

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and also provide a local thickening on our level one slab.

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Let's begin by rotating the 3d foundation view.

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So we can see the core in a bit more detail

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to help us see the slay bit. We're going to remove the visibility of walls.

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Let's select one of the walls

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and on the view control toolbar, we'll select temporary hide, isolate

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and hide the category.

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You can now clearly see the edge of the slab.

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This is where we're going to add our shamp for details.

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Before we can add the sham.

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For details,

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we will first need to load in the profile that we're going to use within our slab edge

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to do this. We'll select the inserts ribbon

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and on the inserts ribbon, we'll select load family

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in the load family dialog box. Let's go ahead and select the profile M 03-03.

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Shan for profile underscore RVT 2021

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we can then go ahead and select open.

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So that Shan for profile that we've just

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loaded in will now be available for slab edges

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to launch the slab edge tool. We will first select the structure ribbon

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and on the structure ribbon under the foundation panel,

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we'll select the structural slab pull down

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and select floor slab edge

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in the properties pallet in the type selector. You'll note here.

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We currently have a type called slab edge thickened 24 inch by 12 inch.

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Let's select edit type

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and in the type properties dialog box, we'll select duplicate.

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We'll give this a type name Sham

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for four inch

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and then go ahead and select OK

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for the profile. We'll now switch this from slab edge thickened to Sham.

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And you'll see here. We have two types.

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In this case, we're going to select the four inch sham.

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We'd also check that the material is set to

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concrete normal weight for K si which it is.

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And we can then go ahead and select, OK.

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In order to place the slab edge, we'll select the edge of the slab opening.

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And you can see here as we go around and pick the slab opening edge,

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you can see the slab edge is applied.

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Notice here,

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we have tools to flip the horizontal and vertical axis of the slab edge if required.

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And we'd also continue to add the champ

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around this edge here as well. So we can pick these edges

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and we'll just rotate the model just to

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confirm that the slab edges are placed correctly

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and that's looking good.

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OK. Let's exit the slab

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edge family by selecting the modify tool,

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we'll now reset the temporary hide isolate.

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So on the view control toolbar, let's go ahead and select temporary hide, isolate

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and reset, temporary hide isolate.

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And now we can rotate the 3D foundation view round.

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So we can see the top of the structure.

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And what we're going to do now is add a slab

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which is going to create a local thickening in this area here.

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So once again, we'll start by loading in a profile that we want to use.

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So we go to the insert ribbon

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and on the insert ribbon, we'll select load family

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in the low family dialog box.

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Let's go ahead and select M 03-03 thickening profile underscore RVT 2021

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and click open,

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we'll then repeat the slab edge tool.

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So in this example, I'm going to right mouse, click,

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go to recent commands and then go ahead and select floor slab edge

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in the properties panel in the type selector.

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You'll know that we've got our last lab that we created.

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Let's go ahead and select edit type,

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we'll duplicate

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and we call this one slab thickening,

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then click. OK.

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Of course. Now we can swap our profile. So we go to the pull down menu here.

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And in this example, we're going to choose the profile M 03-03 thickening profile.

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And here we're going to use the 24 inch by 12 inch.

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We can then select, OK.

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And now to place this, we'll select this lower edge of the slab.

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OK?

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Let's exit the slab edge command by going

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to the context ribbon and selecting modifier.

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What we now want to do is give this slab edge a

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horizontal offset to place it 11 ft away from its current edge

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to do this, we can select the slab edge.

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And if we now look at the instance parameters in the properties paddock,

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we can see here, we have a vertical profile offset

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and a horizontal profile offset

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for the horizontal profile offset. Let's type in 11 ft.

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We'll now go ahead and view this slab edge in a plain view

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in the project browser under structural plans.

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Let's go ahead and open up the top of foundation.

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We can now clearly see our slab

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edge,

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we need to now edit the length of this slab.

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This needs to terminate on grid C

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to do this.

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If we zoom in,

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you can now see here we have these special grips to allow

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us to adjust the segment end at the start and the end.

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So I'm just going to drag this back until it intersects with grid C.

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And that's now set our slab edge length.

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OK. Let's just now review that in 3D.

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So we'll go back and switch to our 3D foundation view.

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We'll orbit around

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and now we can clearly see our champers in place and also our local thickening.

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OK.

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So in summary,

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you can see that the slab edge tool is very useful for adding champers around the

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edges of slabs if required and also for

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adding thickening underneath slabs as we discussed earlier.

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This cannot host reinforcement bar or appear in an analytical model.

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But if that was a requirement, we could have used a beam instead of the slab edge.