Revit Structure Tutorial – Attaching Structural Objects Together

When modelling Structural objects such as walls, columns and trusses it is sometimes very useful to attach the top or bottom of these elements to other structural objects such as roofs, floor slabs and foundations etc. This technique will maintain a parametric relationship between the elements and accommodate edits such as slope and elevation.

Attach Top Base Columns and Walls

You can attach the following families to the references in the table below:

Revit Attach Top Base table

We will start by looking at attaching structural columns to Floors.

In-Situ Concrete Column to Floor

Select a column and then click Attach Top/Base from the Context panel as shown below.

Attach Top Base on Contect panel

On the Options Bar below the Ribbon you will see the followingOptions Bar - Columns

You can of course attach either the Top or the Bottom of the column to a floor slab, the attachment Justification allows for the following processing of the In Situ Concrete columns:

Revit In Situ Column Join options

As you can see the in Situ Concrete members will join as expected but the Steel, Timber and Precast columns will prove more problematic. These columns will not cut and a Reference plane will need to be utilised to create the required detail.

Revit Steel Column Join options

If a Structural Column is attached to a non-structural target such as a roof or ceiling then you will see the following warning, the column is still attached but the analytical model will have no connectivity and behave like a mast!

Error - Non-Structural Target

Walls have a similar workflow where you can attach either the top or base of a wall to a roof, floor, ceiling or another vertical wall. The below image shows a simple example of attaching a block work wall to two structural slabs.

Attach Wall to Floor

Things can get a little more challenging where you have a situation as shown below where your wall needs to attach to the underside of a beam. In this situation you will need to select the wall and then edit the profile and then use the pick lines tool to create the required geometry.

Revit Pick lines to edit wall profile

Also note that if you edit the profile of a wall then this will disassociate the constraints that the Attach Top/Base command adds.

Trusses can be attached to roofs and floors and enables the user to attach the top or bottom boom to various floor shapes. The below example shows a steel truss with the top chord attached to a sloping floor.

Revit - Steel Truss

Here are some more examples with a timber truss attached to a roof and a steel truss attached to a roof that was created as an extrusion.

Revit Roof with Trusses Attached

If the Top and Bottom chord are drastically different then you may have to make use of the Edit Profile tool on the contextual ribbon. This allows the user to create a sketch for both the top and the bottom chords. Also notice that once the truss has been created you can effectively ‘explode’ the truss to structural framing with the Remove Truss Family command.

Revit - modify Truss Ribbon

Enjoy,

 

lawrenceH

 

 

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Revit Structure 2015 – Commands and Shortcuts

I have now uploaded the Revit Structure 2015  commands and shortcuts for this release. I do plan to include the context ribbons and panels in a later post but here is the main ribbon ready for use.

Revit Structure 2015 Commands and Shortcuts – Structure Tab

The new 2015 commands are marked in Salmon whilst the 2014 new commands are marked in Light Green

Revit 2015 Commands and Shortcuts medium

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Autodesk Revit 2015 to Autodesk Robot Structural Analysis 2015

A small change has been made to the method of transferring models between Autodesk Revit 2015 and Autodesk Robot 2015 which is a little different from the 2014 products.

This change will only affect users that need to transfer data via a .rtd file, if you have Revit and Robot installed on the same machine then the transfer method is the same.

In the dialog box below you can see that the .rtd file has been removed and you now need to use the intermediate file (.smxx). This has been implemented to improve the data that can be shared between applications.

Intergration Dialog from Revit 2015

When importing the .smxx into Autodesk Robot Structural Analysis you will need to use the following method shown below. You cannot directly open the .smxx file.

Autodesk Robot 2015 to Revit 2015 .smxx

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Extended Revit Pile and Pile Cap Families

 

http://www.excitech.co.uk/products/Revit-Toolkit.asp

Here is a sneak preview of what will very soon be available as part of our Excitech Revit Toolkit, these familes have been designed to work with our toolkit to facilitate the scheduling of levels and piles.

Optimised for use with our Excitech Revit Toolkit, this extensive library of Pile and Pile Cap families will operate seamlessly within your structural projects and offers many new parameters to facilitate the creation of pile schedules and associated documentation. The range starts from singular piles up to groups of 14, supporting both round and square piles with differing configurations and presented using standard UK pile spacing and edge clearances in conformance to BS8110 and Eurocode 7.

Extended Revit Pile and Pile caps

We are also pleased to offer full integration with the Federation of Piling Specialists (FPS) and our schedules can be imported into the FPS Microsoft Excel spread sheet.

These are now live and available in 2013,2014 and 2015 formats.

http://www.excitech.co.uk/products/Revit-Toolkit.asp

 

LawrenceH

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Revit 2015 – Hidden Detail Control

In previous releases of Autodesk Revit you have to add your own hidden detail into family files or use Show Hidden lines and these are then shown in the relevant views.

Revit - Show and Remove Hidden lines

However, there are issues with this method. Consider the image below showing the structural framing on a roof plan. Notice that the raking steels do not show the hidden detail of the web because they are not 90 degrees (Normal) to the view!

Revit Hidden Lines not shown on raking beams

A quick fix for this in Revit 2015 is to use the new feature of Show Hidden Lines which is found in the Properties Palette for views such as plans, elevations, sections etc. Revit 2015 - Properties - Show Hidden Lines

In the below example I have set this feature to all so all hidden detail is shown. Note that you may have to change your View range settings to allow Revit to show hidden detail of objects outside of this range.

 

Hidden Detail - Revit 2015

The new Show Hidden Lines command has the following options:

Revit 2015 - Options

LawrenceH

 

 

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Revit 2015 – Structural Framing Enhancements

This will be a very interesting year with regards to steel detailing, fabrication and Autodesk software. A few months back Autodesk purchased Graitec Advance Steel and Advance Concrete to extend their offering in the steel detailing & fabrication industry. The only other Autodesk product was AutoCAD Structural Detailing which I would imagine will start to disappear from the various Autodesk suites that included this as there have been very few developments with this software for the past couple of years

Revit 2015 Splash Screen

This year Revit 2015 has seem some great interface improvements with regards to the justification points on steel and precast members and member offsets. We will begin by looking at the justification point tool.

Revit 2015 - Justification Points

This is essentially an ease of use improvement to an existing set of tools to offset steel, timber or precast member both laterally or vertically from the original position to predefined points. This will only reposition the physical position of the member and leave the analytical model unchanged.  The tool can be used equally well in plan, elevation and sections as well as 3D views.

Revit 2015 - Beam Justification points

The offset command will reposition the framing member graphically in the Y and Z axis. This is a much easier way of offsetting the structural framing members.

Revit 2015 - Y and Z graphical Offset

 

The change Reference tool is perhaps my favourite new framing tool in Revit 2015, this tool allows the user to select a new reference for the end of a joined beam and then cycle between these references by using the Change Reference command. See the image below.

Revit 2015 - Picked Reference on Structural FramingRevit 2015 - Change Reference

Another interesting feature is an existing tool from Revit 2013, the humble shape handle. For those of you that didn’t use Revit 2013 or earlier releases the shape handles allowed a steel, precast or timber framing member to have its physical length changed graphically. Revit 2014 omitted this tool and instead relied on the user inputting values into the Properties Palette which was slightly frustrating!

Revit 2015 - Shape Handles

Structural Framing members can now also carry more information about the members physical dimension as well as analysis properties. Each Framing family now has a new category called Section Shape Property.

Revit 2015 - New Section Shape parameter

Once again I will create a detailed tutorial video on these features when I have access to the final shipping release of Revit 2015.

Enjoy,

lawrenceh

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Revit Structure 2015 – New Reinforcement Tools

Link to YouTube Tutorial: http://youtu.be/XCrTi2KEJ7g

As with all my blog posts about new Autodesk releases I will break down each new feature in separate posts and show the full scope of the new tools and features with a UK focus. Those of you that regularly read my posts will know that I keep a very close eye on the reinforcement tools and any new features or extensions that come to market. This year Autodesk have again focussed on the reinforcement and analytical tools for the specific structural enhancements for 2015. The primary goal with reinforcement is to give the RC detailer a better set of tools for the production of 2D RC drawings and accurate schedules.

Revit Structure 2015 Rebar

In previous releases the RC drawings would show every bar but the user now how the choice of selecting the first and last bar in the set, a middle bar or user selected bars. This feature allows the correct presentation of bars in plan and elevation using a similar system to AutoCAD Structural Detailing.

Revit 2015 - Rebar Presentation Panel

The Reinforcement descriptions have had a complete overhaul and can now detail bar with a range indicator and the correct terminators and leaders. This has been achieved by combining a dimension style with a rebar tag.

Revit 2015 - Typical Foundation Detail

The other issue was with bar marks, Revit 2014 would allow multiple bars with the same dimensions to have the same bar mark! In Revit 2015 the bar mark is automatically generated and can be sequenced with a variety of differing options. Partitions are for setting bar marks for each element, you can also see the feature for removing gaps in bar marks and once this is enabled the process is automatic.

Revit 2015 - Reinforcement Numbers

Another interesting concept is that parts can now host rebar, this has some potential but I do really think that families should be authored with parametric rebar, this would make more sense and give a huge amount of flexibility.

All the information and data can now be compiled into a full RC schedule that’s compliant with BS8666-2005.

Revit 2015 RC Schedule - Revit Structure 2015

When the ‘shipping’ version of Revit 2015 is released I will produce a full video showing the capabilities.

Link to YouTube Tutorial: http://youtu.be/XCrTi2KEJ7g

Hope this helps,

lawrenceH

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