Setting Correct Structural Levels

 This may be a simple post and many of you may already be aware of the following but I am going to post it anyway! When modelling in Revit you will have a tendency to start at Level 0 but will later receive the correct or revised levels and need to change the levels. There is a simple way of achieving this rather than trying to move the entire structure, you can simply change the elevation base to shared.

In the above image you can see that the base level is set to 0.00m. To change this to the new required level, click the Manage ribbon and choose Coordinates – Specify Coordinates at Point. Click the Level you want to specify and then you can enter the correct level.

Nothing will change until you change the type properties of the Level and any Spot Levels you have on the model. Select a level and then choose type properties. You will need to change the Elevation Base from Project to Shared. This will then update all the levels within your project. You will need to also do this for your spot levels.

Hope this helps,

LawrenceH

Revit Structure 2012 to AutoCAD Structural Detailing Tutorial

 

As promised I am going to take you through the process of connecting a steel model created within Revit Structure 2012 to AutoCAD Structural Detailing 2012 (ASD) and generate some fabrication details that we can link back into Revit Structure utilising a drafting view.

http://www.youtube.com/watch?v=_R0ithtV8eM

 

ASD is a very comprehensive application that can generate fabrication drawings for steel detailers and also generate drawings and schedules for reinforced concrete. In this tutorial we will focus in on the steel fabrication. This can be really useful for providing typical connection details within your Revit Structure projects and is certainly quicker than creating the various 2D details within Revit, especially when more than one view is required.

I wanted to keep the tutorial fairly ‘snappy’ ,being restricted to just 15 minutes in YouTube, so have limited this to the basics but as with any complex design tool, templates rule! You will need to invest some time to get a good set of templates together for ASD and get the various dimension and annotation settings configured. This can be a very daunting task, see a typical dialog box below! mmm

However, once this is done, the production of fabrication drawings and CNC code becomes very quick and easy. Also it is worth noting that ASD contains quite a few links to ROBOT Structural analysis. Note that this will also import an engineer’s model from ROBOT which can be quite handy.

I hope that this has given you a basic introduction to the features and techniques needed to transfer models from Revit Structure to ASD.

http://www.youtube.com/watch?v=_R0ithtV8eM

LawrenceH

Revit Structure to ASD Steel Detailing

 With the new extension tools you can now pass your steel frame directly from Revit Structure to Autodesk structural detailing providing you have the extensions installed. This is a great way of providing typical connection details both in 2D and 3D within Revit Structure. You first create the steel frame in Revit Structure and then pass this to ASD (AutoCAD Structural Detailing) via the extensions link.

If anyone is interested in a full tutorial on the workflow in Revit Structure and ASD then let me know and I will produce a YouTube tutorial on this subject?

This will then pass the steelwork to ASD, you can either directly launch ASD or create a DWG file to load later if ASD is not installed on your machine. It is then a simple case of creating the various steel connections via the numerous macros that exist within ASD. Each connection is broken down into component parts and will require positioning ( unique part numbers). This is done by selecting all the parts and selecting Auto Positioning. You can then create automatic drawings from the parts and ASD then creates separate sheets with all the required fabrication drawings. These can then be directly linked in to Revit Structure via a drafting view. This is a great way of providing structural connections to prospective fabricators without having to draft them manually.

If anyone is interested in a full tutorial on the workflow in Revit Structure and ASD then let me know and I will produce a YouTube tutorial on this subject?

Hope this helps,

LawrenceH

eTransmit for Revit Structure 2012

eTransmit has been around for the past 10 years in AutoCAD and it is now available for Revit 2012 on Autodesk Labs as a technology preview:

http://labs.autodesk.com/utilities/revit_etransmit/

With eTransmit for Revit, you can:

  • Copy and detach a Revit model and associated files to a single folder for internet transmission. This removes the typical error messages when you copy central files using the operating system.
  • Locate dependent files automatically and include them in the transmittal folder, reducing the possibility of error. All dependent files are automatically converted to use relative paths to ensure that the dependent files can be located by the model.
  • Choose to include related dependent files such as linked Revit models, CAD files, DWF markups, decal images, and external keynote files. You can transmit any Revit (.rvt) model that has been upgraded to Revit Release 2012.
  • Transmit models that are using file-based worksharing or server-based worksharing. eTransmit for Revit will also work with non-workshared Revit models.

Common uses for eTransmit

  • Internal archiving
  • Sending deliverables to clients
  • Model exchange between consultants/partners
  • Model cleanup
  • Sharing models between disciplines

How to offset structural framing members

 

Link to YouTube video tutorial:

http://www.youtube.com/user/RevitStructureBlog?feature=mhum

Many projects require the offsetting of structural framing members in the horizontal direction and Revit Structure provides only one tool to enable the Horizontal offset of a structural frame. This is called lateral justification and is often quite limiting as it only offsets the member about the analytical line and does not allow full control.

You can try this by selecting a universal beam and choosing lateral justification and setting Centre, Side 1 and Side 2 and see the results. Make sure that you have the analytical model switched on so you can see the physical and analytical positions.

It is possible to create your own parameter to control the horizontal offset of the physical framing member whilst keeping the analytical model unchanged. Of course, you can edit the analytical model if necessary.

To begin, select your universal beam and choose edit family from the right click menu. This will open the family editor. You will see the 3D model of your beam. You are actually seeing two 3D sweeps, one model for the medium level of detail without a root fillet radius and the fine model which contains the root fillet.

Select both models as shown below and then choose the associate family parameter command.

In the associate family parameter dialog box, choose Add parameter. Add a parameter called Horizontal Offset, make it an instance parameter and group this under Constraints as shown below.

Click OK to both dialog boxes and then load this into your current project. Select a universal beam and you will now be able to control the horizontal offset as shown below.

Note that you will also have to edit the symbolic lines (Hidden detail) to make the beam look correct in a plan view. I will create a video at a later point to show this process.

Here is the link to my YouTube video tutorial:

http://www.youtube.com/user/RevitStructureBlog?feature=mhum

Hope this helps,

LawrenceH

Revit Structure 2012 Extensions

Many of us have eagerly awaited news and the release date of the Revit Structure 2012 extensions from Autodesk. I have now installed these tools and thought I would quickly post some of the new and improved features. Here is a list of the new and updated features:

  • Floor Vibrations Analyzer (New Feature)
  • Gravity Column Designer (New Feature)
  • Ribbon Integration (See above Image)
  • Column Reinforcement
  • Beam Reinforcement
  • Content Generator
  • Reinforcement Extensions
  • Rebar Interferences Extension
  • CIS/2 Import Extension
  • Steel Connections

There are too many improvements to these tools for one post so I will review each new and improved feature in the coming weeks. If you want to install the Revit Structure 2012 extensions then download them from the Autodesk Subscription site.

LawrenceH