Place rebar with Expand to Host in Revit

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You can add reinforcement elements, such as rebar, to a Revit model.

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Rebar can be added to valid hosts, like concrete beams, columns, structural floors, foundations,

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and other approved concrete elements.

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One of the placement options for rebar is Expand to Host,

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which places rebar by expanding the rebar shape to fill the space provided within a concrete element host.

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To begin, open the Section 1 view, which cuts through the floor and a beam.

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On the Structure ribbon, in the Reinforcement panel, click Rebar to activate the Structural Rebar tool.

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Now, with that tool active, you can choose from multiple options on the contextual ribbon.

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On the Modify | Place Rebar contextual tab, in the Placement Methods panel, confirm that the default Expand to Host option is selected.

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You can set the Placement Plane to Current Work Plane, Near Cover Reference, or Far Cover Reference.

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The Current Work Plane option uses the current active work plane,

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whereas the cover options use the specified cover reference of the host element.

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For this example, select Current Work Plane.

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Next, set the Placement Orientation to Parallel to Work Plane, Parallel to Cover, or Perpendicular to Cover.

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Note that each button has an image indicating how the rebar will be oriented.

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In this case, select Parallel to Work Plane.

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After that, in either the Options Bar or in the Rebar Shape Browser, you can choose the Rebar Shape.

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The browser shows a preview of the shape, but the Options Bar only has a drop-down.

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Choose Rebar Shape 00.

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Now, from the Type Selector, select the rebar size you want to place.

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You can also control the Layout from the Modify | Place Rebar contextual ribbon, in the Rebar Set panel.

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Then, depending on your Layout, you can control the Quantity or Spacing.

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For this instance, leave it set to Single.

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Notice that, when you hover your cursor over a valid host element, like a beam, you see a preview of the rebar.

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You can also press the SPACEBAR to rotate the orientation of the rebar shape within the reference.

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If you want to lock the rebar parallel to a host face, press SHIFT when the preview is near the face.

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In the Rebar Shape Browser, select Rebar Shape T1.

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Now, hover the cursor over the beam and press the SPACEBAR until the hooks are at the top.

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Once your rebar is oriented properly, click to place it.

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Next, choose Rebar Shape 00, and then, in the ribbon, click Parallel to Cover.

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Now, when you move your cursor into the drawing area, you can see a preview of the rebar that looks like a dot.

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At each of the bottom corners of the T1 shape, click to place rebar in those locations.

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Then, click Modify to end the command.

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After placing rebar, you can modify any of the instance or type properties, as well as adjust the Layout.