Archive for the ‘Tips’ Category
- “Revit Extensions for Revit MEP 2009″ may be installed by users with the Administrator” or “Power User” rights (in the Windows VISTA operating system, only by users with the “Administrator” rights).
- “Revit Extensions for Revit MEP 2009″ installed by the user with the “Administrator” rights can be launched on a given computer also by users with the “User” and “Power User” rights.
- Before launching “Revit Extensions for Revit MEP 2009″ by the user with the “User” or “Power User” rights Revit should be launched one time by the user with the “Administrator” rights (in the Vista operating system, with an additional parameter “Run as an Administrator”).
- To launch “Revit Extensions for Revit MEP 2009″ first run “Revit MEP 2009″.
- A new toolbar is displayed containing 3 new icons:
- Click to launch the “Revit Extensions Manager”, run a particular extension or read help for further information.
Using the Compare models extension, you can compare 2 Revit® models. The extension presents differences between successive versions of a structure project.
When the extension starts, it recognizes the number of opened projects created in Revit®. If more than 2 structure projects are opened, a dialog displays where you can select 2 projects to be compared.
Comparing structure models that were created as a result of copying elements (for example, through the Clipboard) may not lead to good quality results. Original element identifiers (ID) may be changed in the extension, which makes element identification and correct comparison of models impossible.
After you have selected 2 Revit® models, the main dialog of the extension, used for comparing models, displays. The dialog consists of 3 tabs: General information, Elements, and Report.
After elements and positioning parameters are selected, element tags / names (for all elements or for selected ones) are generated in the Extension. Position tags are placed in the element properties (in the Mark cell), in the current (start) view, or in views you select (the option specified in the Extension).
Basic functionalities of the Extension:
· create a set of elements and divide them into categories and types
· sort elements depending on their location in the project (horizontal or vertical)
· add a tag describing a user-defined position at the location specified in a selected view.
The Extension allows loading necessary information from Revit MEP:
· object category (column, beam)
· object family (regular I sections)
· object type (I 100)
· object geometry
· object location (level)
· material of which the object is made (after you select the option)
· bars reinforcing RC elements (after you select the option).
If positioning is performed for standard levels, two descriptions may display for some elements: description of the element positioned below (for example, a column positioned on the lower level) and a description of the element positioned on a given level (see the image shown).
A solution to this problem (in particular, when dimensions of elements on two levels are identical) is to make a cross-section at a selected height in Revit ®; for this cross-section, a position number should be displayed.
All data defined during the element positioning can be edited using the Modify option.
Using the Freeze Drawings extension, you can separate a drawing / view from an object model so that the state of the drawing / view stays unchanged (frozen). The extension is based on the DWG Import and DWG Export mechanisms in Revit®.
All frozen drawings / views are placed in newly created views. Selected views are imported to DWG files with user-defined parameters.
Freezing of drawings does not include 3D views or sheets
Use the Text Generator Extension to generate text automatically in Revit®. You can type text directly in the relevant edit field or load text from an external file, and can also define the parameters.
There is a fast way to transfer the filters from one view to another whether you have already created the filter, or need to create a new filter for your views.
You can get to the View templates from the SETTINGS pulldown menu, and click on one of the existing View Template names on the left, and Edit the properties of that view template on the right. There you will create a new Filter that will apply to this template. You can also create a new View template on the left, and edit the view properties on the right.
Then you can apply that view template to as many views as you want. You can select multiple views, right click, and apply a view template to them.
If you already created a filter in another view, you can go to the VIEW pulldown menu and create a view template from the current view that you created the filter from already. Then go back into view template settings, and make any additional modifications to that view template. Then select all the views that you want to apply it to, right click, and apply this view template to them.
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The largest impact on View manipulation performance (scroll, pan, zoom operations) is the Model Graphics Style settings. The Hidden Line Style, due to the requirement to dynamically generate gaps and hidden lines when elements overlap in the View, requires the most processing and thus results in a noticeable performance impact in Views with many visible Elements. The following best practices will help to mitigate this performance impact and streamline project workflows.
In order to streamline project workflow, it is recommended to create both Modeling and Sheet Views for the same regions of the building.
Follow these guidelines
Modeling Views should be configured to utilize the Wireframe Model Graphics Style.
Sheet Views should be configured to utilize the Hidden Line Model Graphics Style to produce the desired appearance for Construction Documentation.
Use Dependent Views for your Sheet Views. This allows you to have multiple regions of an overall Level in different views, while not requiring duplicate Annotations.
Differentiate Modeling Views from Sheet both in View Name and Sub-Discipline, as see to the right in Figure 1. This will provide a logical organization of the view for users, and help to ensure proper usage.
Utilize View Templates to streamline the creation of these Views and achieve consistency.
Utilize Duct and Pipe Color Fills only in your Modeling Views, where the Wireframe Model Graphics Style is used.
Figure 1 – Modeling and Sheet Views
Optimizing Hidden Line Performance
Performance in Views with the Hidden Line Model Graphics Style enabled is directly related to the number of Faces displayed in the View. While Elements appear as 2D Lines in a Revit View, they are 3D Objects made up of faces in the model. It is those faces that are processed Revit by the Revit graphics system and show up in the View as 2D Lines. Use the following best practices to optimize the performance of your Views with the Hidden Line Model Graphics Style enabled.
- Avoid using Fine detail level when working in mechanical views if not necessary, as this displays Pipes as 1-Line Medium detail level is useful for Views working with HVAC systems.
- If using complex 3D Components in your Building Service designs, turn off the visibility of the complex 3D geometry in your Sheet Views. In place of the complex 3D geometry, utilize Model Lines that convey the overall component shape in the Family definition. Make those Model Lines visible in the Detail Level defined in your Sheet Views.
- If not necessary for documentation of working on a View, set the Inside and Outside Gap settings for Hidden Lines to 0, as seen on the right in Figure 2. This can provide substantial performance improvements.
Model Manipulation Performance
Revit MEP allows users to create models of Building Services, often in the form of large connected networks. The powerful analytical capabilities of Revit MEP, in conjunction with the Revit Parametric Change Engine, allow data to flow throughout the connected network when manipulations are made.
Improper structure and configuration of large connected networks has been shown to have a severe impact on model manipulation performance. In comparative testing, models have been shown to perform up to perform significantly better when structured properly.
Testing of customer models with all elements on the Default System showed significant improvements when the connected network was re-structured as logical Systems.
Set Correct Connector Flow Directions
Create Strategic Breaks and/or Use Multiple Files
Strategic Breaks – Creating disconnections in a connected network stops data propagation during model manipulations, as well as the constraints engine that maintains connections. Product Team testing has determined that strategic breaks in a connected network produces the most significant improvements in model manipulation performance. The recommended practice for this strategy is to create disconnections at logical sections of the connected network. For example, in a VAV air distribution system, create disconnections at the upstream connection point on the VAV box. This allows the VAV flow to still be calculated based upon the downstream Air Terminals. A Duct System Schedule can then be used to manually coordinate flow at the Air Handler or Package Unit. The most efficient way to accomplish such a disconnect, while still maintaining proper appearance for documentation, is to model the upstream element without connecting to the VAV and then using the Align tool to locate the end of the Duct at the same location as the VAV connection. To download a video showing this procedure, click here.
Multiple Files – For large, complex buildings, using strategic breaks as well as the aforementioned best practices may still not provide optimum model manipulation performance. In these cases, the model should be built across multiple Revit Project files. There are two fundamental ways to structure the MEP project files, by MEP discipline and by region of the building. Both of these approaches have their benefits and drawbacks, and ultimately it is the choice of the BIM/CAD Manager.
By Discipline This strategy creates separate Project files for each MEP discipline, such as a Mechanical, Electrical, Plumbing, Fire Protection files.
By Region This strategy creates separate Project files for different regions of the building, keeping all disciplines in each file.
Simplify the Display of Architectural Elements
Simplifying the display of architectural elements may help improve performance by reducing the visible elements that must be generated and maintained within the view. This may be done by overriding the Detail Level in the view.
These settings may be configured in view templates and applied to your views to quickly simplify the detail level throughout your project.
Figure 3: Wall with medium detail level in medium detail view.
Figure 5: Wall with coarse detail level in medium detail view.
When you are using either a Mechanical or Electrical view disipline, the view will display those objects darker than the architectural objects or other MEP objects. You can see from this Mechanical 3D view below, the walls are light, and you can see the piping going through it.
If you change the view properties so it is displaying using a coordination disipline instead, the walls will become darker, and the piping will be hidden behind the wall objects. But it will not display the piping with hidden lines.
To do this, you’d probably need to use a basic line tool for this. Perhaps there will be more control provided for this feature in the future. For now the above workaround may help.
If your Revit MEP is on subscription, you can download the new Revit 2008 Worksharing Monitor Extension from your subscription website.
The Worksharing Monitor facilitates the use of Revit software in a worksharing environment, in which multiple people work on one project. For workshared projects, the Worksharing Monitor answers questions like the following:
Who is currently working on this project?
Is my local copy of the project up to date?
When will my Save to Central operation finish?
Has my request to borrow elements been granted?
Are any issues interfering with my work on a Revit project?
NOTE: The Worksharing Monitor is not useful for standalone Revit projects, which do not use worksharing to divide the work for a project among several people.
To install and run Worksharing Monitor for Revit 2008, you need to have at least one product from the Revit 2008 product family installed on your computer. You must have a 2008 version installed, with SP2 or SP3 (also known as WU or web updates). Available products include:
• Revit® Architecture 2008, SP2 or SP3
• Revit® Structure 2008, SP2 or SP3
• Revit® MEP 2008, SP2 or SP3
With any software program, different users use it in different ways. All of the methods and documentation has always been gears towards architects and how they should use the software. But what about the engineers? They use a different workflow than architects. Is the software capable of performing tasks much easier than documented for engineers?
When engineers get the architectural background in a Revit project format, how can you, and how should you create a new MEP project based off of the architectural views for that particular project? Every project is unique, and requires new views to be created. Architects start their projects using a project template, as should engineers. But the same MEP views will need to be created based off of the various Architectural views and levels that the project requires. Why recreate all of that when it’s already in a Revit project?
This blog describes a method where you can have the best of both worlds. You can use the architects project to create the MEP views the project requires rather than creating all of those views a second time yourself as the engineer. Then you can transfer your MEP project standards such as family types, line weights, materials, view templates and object styles into your project.
Open the Architects model. Switch to the Default 3D view and erase all of the elements, switch to a few of the floor plan views to confirm all elements have been deleted.
Use the Purge Unused (FILE->Purge Unused) command to remove all of the Architects “stuff” that is no longer needed.
Use the Transfer Project Standards command to transfer the Family Types, line weights, materials, View Templates, Filters, and object styles and any other settings that you have changed in the template.
Switch to a floor plan view and from the File pulldown and pick Import/Link ->Revit. Browse to the Architects model and link it in. Make sure to use Origin-to-Origin as the Positioning setting.
Select the views that you would like to use for your MEP plans and go to the view properties and modify what view template you want to apply to that view. Or you can use the Apply View Template command from the Right-click menu. This will apply your MEP view template that view.
With the views still selected, Right-click again and select Properties. Change the Discipline catagory to whatever discipline you want that view to apply to, and also set the Sub-Discipline.
You can copy those views and apply other discipline view templates and descipline catagories to them if you are a multi-discipline MEP firm.
Switch to a Floor Plan, and here you can turn off unwanted elements such as furniture. Type VG to start the visibility graphics. You can also control the elements in the Architects Model separately from the elements in your model by going to the Revit Links tab. One example for doing this would be to turn off the Architects plumbing fixtures after placing your Revit MEP fixtures that have connectors on them.
Use the Monitor option from the Copy/Monitor design panel and select the levels to copy from the Architects linked file to your MEP file.
Repeat this step for each of the levels, pick Finish mode when all of the levels have been selected.
Select the button under Display Settings, and choose Custom. Under the Basics tab change the Linked view: to a view in the Architects model that looks the way you want. Then switch to the Model Categories set the Model Categories to Custom and turn off elements you do not want to see.
Now you have the start of your MEP project. You can now begin to lay out your equipment and create your systems. When the architect sends you a new background and you replace the old version with the new version, your project link will update the background. You can then use the Coordination Review tool from the Tools Pulldown menu to see what changes were made. If new levels or views were created, you will need to create new MEP views to display those changes.
In any design software program, that are multiple ways to get similar tasks completed. This is just one way that you can start a project in Revit MEP.
If you look at your Revit MEP model, and you see the confusing winding of piping and duct running through your model, and wonder what system that pipe or duct belongs to? There are ways to show your systems in various colors to make it easier to understand and view your model at a quick glance. You can set up a filter to apply colors by System Type, or by System Name, whatever you want. Check out the Filters applied to the default template in RME 2008 as a guide.
2. Select a view in the Project Browser that you want to apply these filters on, go to Properties -> Visibility Graphics Overrides… -> Filters tab. Here you will select a filter you defined in step 1 and define visual overrides for elements that are returned by the filter.
Keep in mind that Filters can be part of a View Template, so you don’t need to define these for each individual view.