Adding Pads and Piers

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SIMON JONES: Coauthoring a Structural Model in Revit,

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Creating the Substructure--

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this adding piers and pads video is

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going to present a workflow at the isolated foundation pads

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with and without peers to the substructure of our model.

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During this video, we shall place

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a series of individual rectangular pads

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under the bear wall in the lower level of the building.

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Place a series of rectangular pads

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with a peer that will connect to the steel columns

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in the main section of the building.

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And although not required for analysis,

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we should point separate foundation objects,

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so they merged together geometrically.

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We are in the ground floor plan and so select

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isolated from the foundation panel on the structure ribbon.

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In the properties palette, we shall select the footing

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rectangular, 6 foot by 6 foot by 1 foot 6 foundation type.

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And select a footing for the level

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as we should be placing the pad aligned of its top.

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And we shall simply play three pads

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at various gridded sections in the lower

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level of the building.

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Switching to the 3D structural only view

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we can see the new pads added to the model.

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Back in the ground floor plan, we shall once again

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select isolated from the foundation panel structure

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ribbon.

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In the properties palette, we shall select the 14 rectangular

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with peer three 6 foot by 6 foot, 1 foot 6 foundation type.

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The height of the peer needs to be specified.

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And we shall set this to 5 foot 1 with an actual 1 inch

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be provided by the top steel plate

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to give us the required 5 foot

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to the ground level.

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We shall then place a foundation underneath one

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of the steel columns.

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We can take a look at how the peer was determined.

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As we ought to familiarize ourselves with the family

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definition, it's important to do this

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to appreciate how the family functions in the model.

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To do this, select the instance, right click, and select

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Edit family from the menu.

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This will open up the family editor

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in which we see a 3D view of the foundation that

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includes the pad, the peer, and a steel plate.

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To see how the dimensions are assigned,

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open an elevation view such as front.

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Here, we can see that the total drop

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from the top to the reference level

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is the peer depth plus the steel plate thickness parameters.

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Simply close both fuse without saving the RFA file.

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We should place a few more pads with peers

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into the model at the base of the steel columns.

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Once done, we should switch to the 3D

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structural only view to see them added in 3D.

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Revit does not automatically merge to peers with the bearing

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walls.

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So the next objective is to understand

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how to achieve this by joining the substructure geometry.

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If we zoom in a bit and switch to the hidden line

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visual style, it could be seen that the peers have not

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merged with bearing walls.

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To resolve this, select the joint hole

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that is located on the geometry panel on the modified ribbon.

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Since a quarter overlaps with two bearing wells,

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we have the multiple joint option

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enabled on the options bar.

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First, select the peer that select each

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of the two intersecting walls.

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We shall now see a clean geometric intersection

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between the peer and the two walls.

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This is also demonstrated with the next peer.

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This could also be done in a callout detail.

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As we joined to the bearing wall,

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slab edge, and slab, notice how the hidden line geometry

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is removed from the detail that features

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the hidden lines illustrating the position of the steel

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plate underneath the column.