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  • 8/17/2019 S05 Designing Connections Within Revit Structure to Drive BIM Models to Fabrication-Doug Evans_Handout

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    Session 5

    Designing Connections within Autodesk®Revit® Structure to Drive BIM Models to

    Fabrication Doug Evans & Michelle McCarthy, Design Data

    Class Description

    Model accuracy is vital to BIM projects and connections are a critical

    component of making the model accurate. The ability to create as-manufactured model data for fabrication inside Autodesk® Revit®

    Structure is within reach — down to the connections. This class will focus on

    the code-based connection design in Revit Structure using SDS/2

    Connect. Revit Users can communicate the engineer's detailed design

    information downstream, driving the BIM model to fabrication.

    This class will focus on:

    • A "tour" of the SDS/2 Connect Add-in, familiarizing attendees with

    commands and setup

    • Explaining the code-based full joint analysis that takes place during the

    design of connections

    • Showing how Revit Structure models, including connections, can be sent

    downstream for fabrication

    • Demonstrating the various uses for SDS/2 Connect based on the user's

    role in a project

    • Addressing most common issues reported by new users. 

    Brought to you by Autodesk Partner, Design Data, SDS/2 Connect can

    significantly improve the quality of design in your structure. Whether it is

    simply used as a sketch and analysis tool or as a full BIM Round-tripping

    tool with Revit Structure, your projects will benefit from a more accurate

    model complete with connection design information.

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    Designing Connections within Revit Structure

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    About the Speakers:

    Doug Evans Design Data's vice president of sales, has been with the

    company for over 20 years. Throughout his two decades in the steel

    fabrication industry, He has been a part of many technology initiatives

    and panels. Evans was involved with the design and delivery of some of

    the first CNC interfaces between CAD systems and fabrication equipment

    in the early 1990s. Evans also has served on the Intergraph Structural

    Committee and continues to serve on AISC advisory boards that are

    involved in maintaining industry file transfer standards and presentingindustry awards. He has helped concept many products for Design Data

    over the years, with the latest being the rebranding effort that is seen

    today from Design Data. Before joining Design Data, Evans spent five

    years as the director of marketing for the Gallup organization. Doug has a

    bachelor's degree in business administration from Nebraska Wesleyan

    University, with a minor in computer science.

    Michelle McCarthy is strategic sales manager at Design Data, makers of

    SDS/2 software solutions for connection design, fabrication, and detailingsectors. McCarthy presents and sells SDS/2 software products which

    produce as-built models that provide automatic detailing, engineering

    information, fabrication data and much more, reducing the time required

    to design, detail, fabricate and erect structures. Additionally, McCarthy

    has influenced several new additions to the SDS/2 product line as a part

    of the company rebranding. McCarthy received her bachelor’s degree

    from the University of Nebraska-Lincoln, and her master's degree in

    management from Doane College.

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    Designing Connections within Revit Structure

    Doug Evans & Michelle McCarthy, Design Data

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    What is SDS/2 Connect?

    SDS/2 Connect is a Revit Structure add-in that makes it possible for Revit

    Structure users to automatically design steel connections inside of their

    Revit Structure model. These steel connections and members in the Revit

    Structure model will transfer downstream to and from SDS/2 Detailing

    software. Once in the SDS/2 Detailing model, these connections and the

    steel materials may be updated and any changes sent back to Revit

    Structure for seamless updates of the structural model.

    SDS/2 Connect Overview Video 

    Understanding SDS/2 Connect

    SDS/2 Connect provides users with the ability to design and display

    connections inside Revit Structure. There are some basic principles of

    connection design tool that, once understood, will improve your

    productivity with creating and communicating data.

    This first section will introduce help menus, commands, and setup

    options — information necessary for maximizing results from both RevitStructure and SDS/2 Connect.

    SDS/2 Connect Help Menu

    The SDS/2 Connect help menus are built to match Revit Structure help

    menus and navigate in a similar manner. In our help menus, you can find

    our connection guide, outlining the connections that can be designed by

    SDS/2.

    The help menus for SDS/2 Connect are accessible in the upper left hand

    corner of the setup screen or in the lower left hand corner of the

    connection edit screen. Information regarding installation details and

    deeper explanation of the setup screens, along with other pertinent

    details, are available to users from the help menus.

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    The help menus include numerous images and instructions to help you get

    your desired connections. They also include a more detailed explanation

    of how connections are designed by SDS/2 Connect. This information can

    be found in the help menu by selecting

    TopicsConnectionsConnection Design. This outlines the steps that are

    taken in designing the connections.

    Commands in SDS/2 Connect

    There are currently eight major commands in the SDS/2 Connect add-in

    (from left to right in image below: Options, Import Fastrak Forces, Edit,

    Report, Connection Type (Auto Std, selectively designs connections),

    Design All, Export from Revit to SDS/2, and Import to Revit from SDS/2.

    SDS/2 Connect basic toolbar ribbon

    Accessing the various commands is intuitive. Any command on the SDS/2

    Connect toolbar with an arrow below it has multiple options for the user to

    choose from. Clicking on the arrow will provide access to setup menus

    and design preferences for SDS/2 Connect.

    Options

    This setup area is primarily designed for use when models are being

    transferred between Revit Structure and SDS/2. Choosing to design

    established connections will only allow Revit Structure to make

    adjustments to connections that have already been designed by Revit,

    and it will leave all un-designed areas alone. Designating the whole

    structure will work on every joint in the model. These options allow users to

    selectively design connections and also save processing time.

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    Materials

    The materials setup area is the interface through which SDS/2 Connect

    maps Revit Structure families to a form that is recognizable by SDS/2

    Detailing software.

    Setup

    The default setup can be used “out-of-the-box”; however, knowing your

    way around setup can help you achieve your desired results more quickly.

    These setup options match many options regarding connections in SDS/2

    Detailing. Most of the setup options in the menu affect connection design.

    The ones listed below will have brief descriptions that aid in understanding

    the way connections are designed by SDS/2 Connect. 

    Auto Standard Connections

    o  Automates connection design by letting users pre-determine

    connections that will be designed based on framing

    conditions that occur in the model.

    o  Due to full erectibility checks, certain framing conditions will

    override the auto standard connection.

     

    Schedule of Minimums

    o  Allow users to override connection design and simply apply a

    chosen number of rows of bolts based on member size.  Design Criteria

    o  Engineers may select from any available design codes.

    o  Includes settings for applying automatic loads to beam and

    bracing connections, selecting steel grades for connection

    materials and more.

    Check Project

    Users have two options here: to find orphaned connection material and

    to find undesignable members. These tools are available to identify such

    situations in the model so that they may be rectified.

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    Library

    In this area, users map to their Revit Structure families. Currently, SDS/2

    Connect works best with the Imperial library. NEED EXAMPLE OF HOW THIS

    MIGHT BE USED.

    Import Fastrak Forces

    Importing a CXL file allows users to transfer load information from CSC's

    Fastrak Building Designer into the SDS/2 Connect add-in. As part of this

    process, the user will answer a few questions on moment loaded

    connections, which will allow them more control over the design of those

    connections. This will apply loads automatically to connections in theproject and eliminates the need to input loads by hand into SDS/2

    Connect.

    Edit

    The Edit command will allow users to edit an existing connection, or

    create a new connection. All the options found in the connection edit

    window are linked to the same options that exist in SDS/2 Detailing — 

    allowing for this information to be exchanged and updated during the

    round tripping process.

    Through this command, users can edit connection types, loads, plate

    thicknesses and even weld information.

    Report

    Users can access connection design reactions, force checks and long-

    hand calculations through the Report command. Simply select the

    member or members you require a report for, and click the Report buttonon the toolbar to view a condensed version of the report. This can be

    expanded in a browser window to access the long hand calculations.

    Connections

      The Connection command will be populated with the connection

    type most recently used — Auto Std will be the default upon opening

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    Revit Structure. The various types of connections that SDS/2

    Connect can design for are:

      Auto Standard Connections

    o  These are any one of the below connection types, but are

    system determined, based on framing conditions.

      Plain End

    o  Does not design a connection, but allows users to keep the

    system from placing a connection on the member end.

      Clip Angle

    o  Single or double angles.

    o  Moment and safety connections can be applied.

      Bent Plate

    Single or double bent plates.  End Plate

    o  Moments, safety notches or offsets are supported.

      User Base/Cap Plate

    o  Draws from a user-defined plate set up.

      Auto Base/Cap Plate

    o  Will automatically detect steel and add base or cap plates to

    a column that is meeting a beam.

      Shear

    Single plate shear connections.

    o  Moments, thru-plates, multiple columns of bolts can be

    applied.

      Seated

      Splice

      Vertical Brace

    o  Handles L, LL, WT, HSS, WF and pipe.

     

    Horizontal Brace

    Handles L, LL, WT, HSS, WF and pipe.

    Export to SDS/2

    For the “Export Revit to SDS/2” command, the user has five export options.

    Based on the choice for export, there will be different results in the

    information transferred. From the different options, users can either export

    all structural elements, modified structural elements only, or a selection of

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    structural elements. This provides users the highest level of control over the

    information to be transferred between Revit Structure and SDS/2.

    Whichever method of export is chosen, the Revit model can be exported

    from Revit Structure to SDS/2 Detailing with OR WITHOUT having the

    connections designed.

    Import from SDS/2

    Importing a model from SDS/2 is as simple as clicking the import button

    and browsing to the file that is ready for import. This can populate a new

    Revit Structure project, or it can be an update to an existing model.

    It is important to note that if an engineer chooses not to design

    connections on the project, they can still use SDS/2 Connect to import

    connections back into the Revit Structure model for clash prevention or

    detection. If the engineer has SDS/2 Connect, they can export a model

    that will allow detailers with SDS/2 to design connections AND detail steel,

    then send a file that will enable most connections to be shown in the Revit

    Structure model.

    How Connection Design Works in SDS/2 Connect

    Many connection design software programs simply calculate loads and

    member sizes to design connections, but there are so many more factors

    that affect connection design on a project. All SDS/2 connection design

    products will automatically design connections considering loads,

    member sizes, steel grades, bolt types, framing conditions, entire joint

    analysis, fabricator's stock and equipment capbilities, and even fit-up and

    constructibility in the field. With all these manufacturing standards as a

    built-in part of the connection design, the overall design of the structure is

    better and more cost effective.

    The following sections will walk through several of these factors to show

    areas where users have more control and demonstrate how connections

    are developed by SDS/2 Connect.

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    Framing Conditions and Auto Standard Connections

    Framing conditions play an important role in SDS/2 Connect’s methods of

    connection design, particularly when using an Auto Standard

    Connection. Auto Standard Connections are connections that can

    automatically be applied and will “self-determine” the connection type

    to be applied, based on the Auto Standard Connection area in Setup.

    With these setup options, the user can automate the connection design

    process even further, allowing the system to do much of the work for them

    on simple connections. There is full control over the type of connection

    that can be selected for numerous framing conditions.

    Using Auto Standard Connections, companies can mold SDS/2 Connect

    to automatically create preferred standard connections for a project,

    and can significantly impact the time spent designing connections.

    Click here for YouTube video demonstrating framing conditions and auto

    standard connections. 

    Loads

    SDS/2 Connect can design connections for a specific end reaction. Loadsfor designing connections are either input at each node or automatically

    set by the Automatic Design Load in the Design Criteria section of Setup.

    The default is set for 50% uniform allowable load or maximum web shear,

    but can be changed to suit the user’s needs. If loads are present in the

    model from analysis done by an engineering software product, SDS/2

    Connect can import that information to supersede the automatic design

    load.

    When you manually change loads, SDS/2 Connect quickly shows results of

    this change in the newly designed connection based on the specific

    load. It may cause increases in bolt diameters, weld sizes (though welds

    aren’t shown in Revit Structure), plate thicknesses and the number of rows

    of bolts. Loads can also cause SDS/2 Connect to fail, or not design a

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    connection because with the given parameters, one of the members

    may not be capable of supporting the connection.

    Click here for YouTube video demonstrating the effect of loads in SDS/2

    Connect. 

    Connection Specifications

    SDS/2 Connect users gain further control over the connections inside Revit

    Structure through connection specifications. These areas allow you to

    make common adjustments to the connections, such as selecting steel

    near side or far side for a shear plate, setting up safety connections and

    choosing attachment methods like welded or bolted.

    Click here for YouTube video demonstrating changes in connection

    specifications. 

    "Intelligent" Connection Design

    SDS/2 Connect considers the entire framing situation when designing a

    connection. That means that during the connection design process, it

    takes into account opposing members, fit up and constructability in

    addition to the load. The best example of this is shown in this video.

    Click here for YouTube video showing intelligent connection design in

    SDS/2 Connect. 

    Framing conditions also play into the intelligent connection design found

    in SDS/2 Connect. To speed up the connection design process, this add-in

    will read the framing condition and can change the connection

    automatically. Whether it is the rotation of a column as seen in the video

    or interference from other members, the system can automaticallychoose another connection that will work, if the chosen connection fails.

    Going even further, connections that require consideration for the

    erector, like copes for bolt clearances or equipment, are automatically

    incorporated in the design. The ability to include this kind of

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    manufacturing knowledge in the connection design process results in

    better information and fewer Requests For Information or change orders

    later in the project.

    User Connections

    User connections allow users to override the system-designed connection

    and manipulate the connection to meet specific requirements. For each

    Connection Edit screen, there is a check box in the upper right hand

    corner that, when checked, allows users full editing capabilities over the

    design detail and end prep settings. The fields shown are all of the

    engineering dimensions in a connection. Whether changing plate or

    angle sizes, numbers of bolts, or materials used, the user has full control

    over the connection.

    An additional feature of this modification is the cross dependency of

    each field. As you enter into a field, for example rows of bolts, SDS/2

    Connect will show arrows indicating that other fields, such as length of

    plate, will update and need verification.

    This provides added control over the connection. If a particular

    connection cannot be obtained automatically, the user can simply make

    edits to connection materials to manipulate it into the desired

    connection.

    Click here for YouTube video showing user connections in SDS/2 Connect. 

    Technical Information on SDS/2 Connect and Revit

    Learning a little more about the technical side of the interaction between

    SDS/2 Connect and Revit Structure will be helpful as you start designing

    your own connections. With a basic understanding, it will enable you totrouble-shoot any issues and better manipulate the materials and

    connections in the Revit Structure model.

    For SDS/2 Connect to design connections inside of Revit Structure and

    transfer the information to and from SDS/2 Detailing, some data had to be

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    added to Revit Structure. The first major modification done by SDS/2

    Connect is to modify some of the Revit Structure families. Upon the

    initialization of the SDS/2 Connect add-in on your project, Revit Structure

    families are modified with more detailed information, which enables

    connection design.

    The following families are modified by SDS/2 Connect:

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    Wide Flange

    L-Angle

    LL-Angle

    W-Tee

    Channel

    HSS Rectangular

    Pipe

    HSS Round 

    SDS/2 Connect adds the following families during initialization:

    Plate

    Angle

    RoundPlate

    Bolt

    StandardBolt

    StandardBoltArray

    BentPlate

    These are very simple implementations of these materials and are not

    intended to be modified by hand once installed. Since SDS/2 and Revit

    Structure don't have all the same functionality, there will be instances

    where members may not transfer properly. For example, on a single or

    double angle vertical brace, SDS/2 Connect “shifts” the material of the

    angle so that the work line is on the material gauge line. That “shift” is

    something SDS/2 Connect adds to Revit Structure's families.

    Memory limitations can be a concern with the Revit Structure model.

    The number of elements required to display connections inside RevitStructure pushes its memory limitations for larger structures. This does

    impact performance of Revit Structure. During the development of

    SDS/2 Connect, steps were taken to get the best performance

    possible. Below are some tips that can improve performance on larger

    models:

      Avoid fine grain views when not viewing connections

      Set up SDS/2 Connect to skip generating bolts

      Holes and welds are not generated inside Revit Structure but will

    appear once transferred to SDS/2 Detailing

    These small modifications result in a big performance boost for your

    model, and the tradeoff is simply being unable to see the bolts and

    holes. It is possible to turn the bolts back on to view them later or just in

    small view ports.

    Design Data and Autodesk are working together on the future

    development of this technology. This mutually beneficial partnershipallows the Revit Structure model to be more manufacturing-friendly

    and leads to SDS/2 being included earlier in the BIM concept and

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    design phase. Work on both SDS/2 Connect and future Revit Structure

    versions continues. Revit Structure 2012 has advanced features for

    cutting and coping due to this add-in and SDS/2 is adding changes to

    work more seamlessly with the Revit Structure model.

    Potential Workflows

    SDS/2 Connect offers both connection design capabilities and BIM

    functionality in the form of model round-tripping. There are several real-

    world applications for SDS/2 Connect, based on the user’s role in the

    construction process. Improvements to the work process for

    fabricators/detailers, general contractors, architects and engineers

    can be achieved in a variety of ways with SDS/2 Connect.

    The way that SDS/2 Connect designs connections with considerations

    for the needs of engineers, fabricators and erectors makes it a perfect

    tool for aiding in value engineering. Value engineering can save as

    much as 20 percent in steel costs on a project, when you consider how

    it can reduce the cost of materials used, welding necessary, man-hours

    and time that is spent in fabricating the steel. With the ability to quickly

    generate connections, SDS/2 Connect can help engineers analyze

    and compare several connection configurations and design reactions

    in a few minutes.

    Being able to access this type of connection information inside the

    Revit Structure model brings it one step closer to the accuracy needed

    for manufacturing structures. SDS/2 Connect also enables engineers to

    send a more accurate model to detailers and fabricators and drives

    information more quickly to the manufacturing level.

    SDS/2 Connect has several implementations for an engineer. Any way

    you use it, SDS/2 Connect helps value engineer a structure — it can act

    as a simple connection design and sketch-generating tool, aid in

    round-tripping functionality to attain better pre-construction models, or

    simply eliminate wasted time and lost information through other BIM file

    transfer methods. The following sections will discuss these uses for SDS/2

    Connect.

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    Connection Design and Sketch Tool

    As a simple connection design tool, SDS/2 Connect can drastically

    save time for engineers. It eliminates a significant amount of time spent

    creating standard connection sketches from Revit Structure by

    automating the design process and adding connection materials all in

    one step. Once you have the connection in sketch form, users can

    add any additional information necessary, such as dimensions or

    callouts.

    An engineer using SDS/2 Connect to help determine the best

    connection to use in a given situation can simulate various connection

    types and the accompanying design calcuations in only a fewseconds per connection. This method can help engineers quickly test

    and determine the preferred connections, and automates calcuations

    that were previously done by hand or spreadsheet.

    This would be done mostly by engineers who choose to generate

    connection tables and sketches that are to be sent downstream to the

    fabricators and detailers producing the manufacturing models.

    Model-Based Connection Design

    Model-based connection design can be facilitated in two ways by

    SDS/2 Connect. The first method follows the work flow that many

    projects currently use, which is to allow the fabricator/detailer to design

    the connections, subject to approval by the engineer. A second option

    is that engineers can use SDS/2 Connect to design the critical

    connections in the design model and provide generic sketches for the

    rest of the project. We will discuss both options.

    There are several methods of approving connections designed by

    fabricator/detailers. SDS/2 Connect can help expedite the connection

    design and the approval process. Using the SDS/2 Connect add-in,

    engineers can export their design model (prior to any connection

    design) to the manufacturer, who will import it into SDS/2 Detailing.

    Once imported, the fabricator/detailer can design connections on the

    model and roundtrip the model, with connections, back to the Revit

    Structure model for the engineer to view and approve. Because of thetight integration achieved through SDS/2 Connect, all the connection

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    information (connection materials, copes and calculations) is available

    for review in the design model.

    So without adding connection design to the work of the engineer,SDS/2 Connect can facilitate the communication of connection

    geometry and information necessary for approval. With these

    connections in place, an added benefit for BIM projects, is that clash

    detection and prevention for gusset connections can be performed

    earlier.

    The second work flow example of model-based connection design

    powered by SDS/2 Connect is the ability for engineers to design their

    own connections in their Revit Structure design model. In this example

    work process, the engineer may choose to utilize SDS/2 Connect to

    design only the critical connections, say about 10 percent of the

    connections on the project. Connection tables and sketches can

    communicate the rest of the basic information downstream for the

    fabricator/detailer to provide.

    By designing and representing these critical connections in the model

    earlier, engineers can make better informed decisions on the project.Access to this type of connection information earlier in the project

    allows proactive clash prevention to be performed between gussets

    and the piping in the structure, instead of reacting to clashes later in

    the process or as they happen in the field. Simple connections can be

    handled by the detailer in SDS/2 and imported back into Revit

    Structure via SDS/2 Connect, if necessary.

    Pre-Construction Bids & BIM

    Whether or not engineers are designing connections within the Revit

    Structure model, the round-tripping functionality of SDS/2 Connect can

    be utilized by engineers to create a more accurate BIM model. Often

    as a part of the bidding process, detailers and fabricators receive the

    Revit Structure model and use it for the basis of their bids.

    Think about how this can affect costs and turnaround time if you allow

    that model to be utilized to its fullest potential. A fabricator/detailer

    with SDS/2 can import a model exported via SDS/2 Connect to get

    more accurate material take-offs and advance bills of material

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    allowing for users to resolve any connection or design issues before

    they reach the manufacturing stage and incur more cost. This also

    results in more immediate and reliable material take-offs, accurate

    fabrication drawings, and cuts down on the time needed to fabricatethe structure. Depending on the completeness of the pre-construction

    model, they could also eliminate the need to re-input major structural

    members and start the detailing process more immediately after the

    bid is won.

    Looking further into this workflow, after the bid is won, suppose an

    engineer sends a detailer/fabricator their more complete design

    model from Revit Structure, using SDS/2 Connect to facilitate the

    export. The detailer would begin by making some simple checks for

    accuracy and then use SDS/2 to design any connections not already

    designed in Revit, input miscellaneous steel like handrails, stairs, etc.,

    and create drawings and reports. Any time throughout this process,

    changes to the structural model can be sent to Revit Structure, bringing

    the pre-construction model closer to the as-manufactured model.

    Communication between pre-construction models and as-

    manufactured models has the most positive effect on:  Accuracy of material take-offs result in better model-based

    estimates

      Elimination of duplicate information

      Shorter turnaround time from design model to fabrication model

      Connection design/approval in native environments

      Design decisions can be influenced by fabrication needs earlier

    on, resulting in a structure that is less expensive to manufacture

      Generation of connection calculations is almost immediate

      Reduces number of steps necessary to get to shop drawings

    SDS/2 Connect FAQs

    One of the goals of this presentation and handout is that attendees

    can leave with enough knowledge to download, use and evaluate a

    trial of SDS/2 Connect. With that in mind, the next section covers a few

    of the questions most frequently asked of SDS/2 Connect Support.

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    Connections are Not Being Designed

    There are three main causes for connections failing to be designed

    when using SDS/2 Connect.

    At times, new users may have trouble simply applying connections or

    editing existing connections. Often in this situation, SDS/2 Connect is

    not recognizing the beam or column as a connectable member. This is

    usually because the Structural Usage is not set correctly. To see if this is

    the case, users can invoke the "Check Project" command and click on

    "Find undesignable members." This will identify the members in the

    project that have their structural usage set incorrectly for connection

    design. The correct structural usage for a beam is either Girder, Joist, orOther. Don't get confused here, because SDS/2 Connect doesn't

    actually design bar joist connections inside Revit Structure yet. In the

    case of vertical brace connections, the structural usage must be set to

    Vertical Bracing and for horizontal brace connections it must be set to

    Horizontal Bracing.

    The other cause for undesignable members is that the families may not

    have been modified correctly. This is particularly common for

    companies that are not using default families or have developed

    custom, in-house families. During the initialization process of SDS/2

    Connect, these custom families may not be recognized and will not be

    modified to accept connections.

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    In most cases, this can easily be corrected by mapping the custom

    families correctly in the Material File Mapping window, found in the

    SDS/2 Connect setup options. To manually map custom families

    correctly, users will select the custom family from the left hand column,

    then choose the section type, material file source, the sections to be

    mapped, and click OK. It is very important to note that the check box

    "Modify this family" must be selected as well.

    The W-I-sections are not from the default families and cannot automatically be

    mapped in SDS/2 Connect. This is what you will see if you have a custom family.

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    The final reason that connections can't be designed is due to structural

    failure SDS/2 Connect will purposefully not design connections that are

    not physically possible, or are not yet included as a supported

    connection type. If a connection fails for this reason, users will find a

    warning on the bottom of the connection edit window that offers an

    explanation for the failure. For example, a very high load on a beam

    with a shear plate connection may cause it to fail because the beam isnot deep enough for the number of rows of bolts required for the

    connection with the load applied.

    Export Warning

    Another common question asked by users is related to a warning that

    pops up upon export. It will come up when a user is attempting to

    export the model from Revit Structure, and a message that states

    "Project name is current against this file" will appear.

    When mapping custom families, Users can select Section type, Material file and even

    make changes to any of the variable fields if necessary.

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    This has two potential causes. The first, most simple explanation is that

    the user has exported the model twice without detecting any change

    between the export. The two exports may have occurred without

    importing an update between the instances of generating the exports,or an update was imported, but contained no changes. Either way, it is

    indicating that the project is actually current and up to date.

    More often, the problem is that Libraries are not set up correctly. This is

    corrected by going to the Revit logo in the upper left corner and

    selecting Options. Once in the Options dialogue, go to the File

    Locations tab and finally select Places. In the Places window, the

    correct setup should be a Library Name of Imperial Library for imperial

     jobs and Metric Library for metric jobs, as shown in the screenshot. The

    Library Path on your

    own computer may not

    match this path

    exactly, but should

    point to the location

    where the families are

    stored on your network.

    The path shown in thescreenshot should be

    where these are

    installed by default.

    This library mapping

    issue has come up

    commonly for

    customers on new

    license installs of Revit

    Structure 2012.

    Revit Loads

    Many SDS/2 Connect users have asked if SDS/2 Connect can use loads

    imported from other analysis programs such as RAM and RISA. In

    currently available versions, SDS/2 Connect can already import

    member end and moment loads from CSC's Fastrak Building Designer.

    Correctly map Libraries by clicking on the Places

    button in the Options dialogue box.

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    In the next release of SDS/2 Connect, it will also read member end

    reactions stored in Revit Structure. This is a newer feature that will allow

    users to take advantage of loads sent to Revit Structure by analysis

    programs like RAM and RISA. Currently, the only member end load thatRevit Structure stores in its database is shear loads for beams. This

    limitation in turn limits SDS/2 Connect to only reading shear loads as

    that is the only information available.

    Tagging

    Material tagging has become a common request for SDS/2 Connect.

    Currently, it is possible for users to tag plate descriptions and angle sizes

    only, for connections designed with SDS/2 Connect. This is done via a

    unique family created by Design Data, that allows this specific

    information to be pulled from the connection material. Users interested

    in accessing this information can contact SDS/2 Connect support and

    request this family. In later releases, it may be integrated into the

    installation of SDS/2 Connect.

    SDS/2 Connect is a connection design tool, made to improve the

    connection design process by integrating manufacturing knowledge in

    the Revit Structure model and providing engineers a quicker way to

    get design reactions and connection validation. SDS/2 Connect is not

    a detailing tool, because Revit Structure is not a detailing tool.

    For users that are looking for a highly detailed as-fabricated model, or

    a model that is prepared for fabrication, with information like cope

    lengths, bolt diameters, bolt counts, and weld sizes, you are looking for

    a steel detailing product, not a design model authoring tool. SDS/2

    Connect allows users to send the design model informationdownstream to SDS/2 Detailing and other SDS/2 products, where that

    information is easily and quickly obtained. That is not a function of

    SDS/2 Connect, nor of Revit Structure.

    Revit Structure is clearly a superior authoring tool for the pre-

    construction model, but is not designed to contain the detail down to

    the level necessary for manufacturing. SDS/2 Connect helps Revit

    Structure get closer as it can include some of that manufacturing

    information. However, its strongest point is that SDS/2 Connect helps

    Revit Structure communicate with the manufacturing model in SDS/2

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    Detailing, tying together the pre-construction model with the as-

    manufactured model.

    For More Information About SDS/2 Connect

    To learn more about the SDS/2 Connect add-in for Revit Structure and

    download your own free trial, please visit www.sds2connect.com.