Tuesday, 26 July 2011

Reusing data in Revit

Need to reuse details from project to project? (of course!) Did you know that you can directly copy views from one project to another? Simply select and copy them from the project browser. Then paste them (ctrl+v) into the work area of another project!

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This works on:

  • Drafting Views
  • Schedules
  • Empty Sheets
  • Entire Sheets with only Drafting Views on them
  • Legends will not work!

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(Depending on your browser organization) the views will show up in the same position they did in the previous project.

Revit - 2D vs. 3D AutoCAD Backgrounds

Did you know there are two very different types of CAD backgrounds?
  • Flattened “2D” backgrounds that are overlaid onto a view
  • Model element “3D” backgrounds that have a physical location within the model
The easiest and preferred method to link in a dwg is as a 2D background.

How can you tell them apart?
Select a CAD background.. if you are able to specify foreground / background from the options bar, then it is a 2D background.
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When would you want to use a 3D background?
3D doesn’t necessarily mean a dwg will be given depth; what it really means is that the dwg will be created as a model element
  • 3D backgrounds will be visible in all views where they are within the view range. Therefore if you link a CAD plan in, all floor plan views will automatically show the background!
  • If you want to see the dwg in a 3D Isometric or Perspective view
  • If you want to see dwg elements that were modeled in 3D
  • Because 3D backgrounds have a physical location, they can be obscured by other elements such as walls, ceilings or finish floors
  • A 3D background is not flattened, so any linework that has a height (Z value) other than 0” may show in unexpected places or not at all.
  • A 3D dwg linked into a floor plan will not show on an RCP even if you “copy/paste” it into the view UNLESS you give it a positive offset (such as 9’-0”) to bring it into the RCP view range
  • The seemingly random, bulgy, coloured linework in an elevation is usually a 3D dwg being seen from the side. These can be easily hidden by turning off “Imported Categories” through VG.
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Setting an Offset
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CAD Obscured Hidden Line by Ceiling
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Same CAD visible in wireframe

When would you want to use a 2D background?
In most cases a 2D background is the easiest to work with because they cannot be obscured by other elements
  • A specific background (such as furniture) that does not need to automatically show in all views
  • RCP backgrounds
  • Elevations, Sections or other views where there is no real workplane for the dwg to be placed on
  • Sending the dwg link to foreground will show the CAD on top of all model elements. Sending the dwg link to background will place it behind model elements.
  • 2D views WILL NOT show up in all views automatically, however they can be copy/pasted into other views (the link will still update)

So how do you choose to link a dwg as 3D or 2D background?
Actually it doesn’t specifically say annotation or model, 2D or 3D… the option is found in the dialog box when you are first linking the background as “Current view only”
  • Checked will create a 2D background
  • Unchecked will create a 3D background
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Revit Architecture – underlay

Kevin Shumbera explains how the underlay feature can assist when generating a reflected ceiling plan & then coordinating with the furniture layout.

Kevin says – “When working in a reflected ceiling plan, it is helpful to know where the furniture occurs”.

Revit provides UNDERLAY tools to make this easier.

You can work in the Ceiling Plan while viewing the Floor Plan as an Underlay.

NEW – You can work in the Floor Plan while viewing the Ceiling Plan as an Underlay.  (this can be useful for MEP tasks).

The examples below, show a floor plan and a reflected ceiling plan

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To see the furniture in the RCP, turn on the UNDERLAY in the VIEW PROPERTIES, as shown below:

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What is new is that it is possible to see the Ceiling in a Plan view.

Turn on the UNDERLAY and change the UNDERLAY ORIENTATION from Plan to REFLECTED CEILING PLAN:

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Note:  It is also possible to see an underlay from a level different from the current level, if needed.

Looking for something?

confused

Kevin Shumbra from HOK’s Houston offices shares some wisdom on “stuff” which goes missing in Revit. Revit likes to play hide and seek… here is the process I use to find missing elements (beginning with the most likely cause)

General

Element is visible in other Views

Open another view or draw a new one.. If the element shows up, it may be one of the follow settings:

Workset
What Workset is the element on? Check the setting in element properties from a view where it is visible and  then check the VG settings in the view where it isn’t visible. Or turn on ALL Worksets through VG.

Wireframe
Elements can be covered up by other elements or even masking regions, change the view to wireframe to make sure this isn’t happening. If so, is the element at the right elevation? The family may need to be modified to show correctly, or the covering element can be made transparent.

Reveal Hidden
The element may be hidden in the view, or by VG category. Turn on the light bulb to shows elements hidden one at a time or by category.
*Elements hidden by Workset will not show up in this mode.

Visibility Graphics
Check the VG settings to make sure the category isn’t turned off.

Visibility Graphics II – Revit Link
If the element is coming from a linked model, you may need to check the custom VG settings in the Revit Links tab. If a link is set to custom or “by linked view” then it’s VG settings won’t come from the regular view settings.

View Range
Is the element within of the view range? Draw a section where the element should be and see what elevation the element is at. The default cut plane is at 4’-0”, so elements above this will not show, nor will elements below the view depth. You may need to reposition the element, change the view range, or modify the family to make it show.

Design Options
Is the project using Design Options? Cycle through each of the options in the VG Design Options menu.

Phasing
Is the project using phasing? In View properties set the “Phase Filter” to none, this will ignore the phase of an element and show everything. If the element reappears, it may have the wrong phase or the view properties may be set incorrectly.

Filter
Does the view have filters applied? Check in VG and turn on ALL of the filters.

Family Properties
Edit the Family and go into the view that you are trying to see the element in (Plan, Front or Side Elevation etc.. ) Select a single part of the element and go to the “Visibility Settings” button from the toolbar. These settings can turn off any element in plan or elevation views and coarse, medium or fine detail levels. Within the project you can also change the detail level of the view between coarse, medium and fine.

Element is not visible in other Views

Workset
Is the element on a Workset that is turned off by default? Turn on all Worksets on in VG

Worksets II
Go to the Workset manager from the Collaborate menu and check that the Workset is open and not closed. Closed Worksets are unloaded from all views in the model.

Detail Lines
Element drafted with details lines, symbols or detail components will only exist in the view where they are drawn.

Family Properties
Edit the Family and go into the view that you are trying to see the element in (Plan, Front or Side Elevation etc.. ) Select a single part of the element and go to the “Visibility Settings” button from the toolbar. These settings can turn off any element in plan or elevation views and coarse, medium or fine detail levels. Within the project you can also change the detail level of the view between coarse, medium and fine.

Design Options
Is the project using Design Options? Cycle through each of the options in the VG Design Options menu.

Phasing
Is the project using phasing? In View properties set the “Phase Filter” to none, this will ignore the phase of an element and show everything. If the element reappears, it may have the wrong phase or the view properties may be set wrong