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Designing Connections in Autodesk® Revit® Structure to Drive BIM Models to Fabrication Doug Evans Michelle McCarthy.

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Presentation on theme: "Designing Connections in Autodesk® Revit® Structure to Drive BIM Models to Fabrication Doug Evans Michelle McCarthy."— Presentation transcript:

1 Designing Connections in Autodesk® Revit® Structure to Drive BIM Models to Fabrication
Doug Evans Michelle McCarthy

2 This class will focus on:
Manufacturing’s role in the BIM process The basics of operating SDS/2 Connect The code-based joint analysis involved in designing connections Demonstrating how the Autodesk® Revit® Structure model can be sent downstream for detailing. Addressing audience questions and FAQ’s asked by newer users

3 Manufacturing’s Impact on BIM
Manufacturing concerns impact a structure throughout the construction cycle, not just during actual fabrication Bidding, Pre-construction, Design, Scheduling, Shipping, Construction Most are currently communicating with BIM models at a design level Engineer to Fabricator Using a BIM with LOD 200 at best If you’re interested in connection design inside Revit Structure, you’re interested in at least LOD 300

4 What is Level of Development ?
Level of Development (LOD) is a description of the steps through which a BIM element can logically progress from the lowest level of conceptual approximation to the highest level of representational precision. LOD 100 Conceptual LOD 200 Approximate geometry LOD 300 Precise geometry LOD 400 Fabrication LOD 500 As-built

5 Manufacturing’s Impact on BIM
LOD 400 information can enhance the BIM in various areas Target Value Design (TVD) or Target Costing A Lean Construction principle Cost is a consideration in design and requires rapid cost feedback Integrated Project Delivery (IPD) Improve Model based estimating Ties in with TVD Detailed manufacturing info = more accurate estimates Can perform cost comparisons Clash detection Scheduling

6 Communicating with Manufacturers
Data loss and misinterpretation Inefficient use of time recreating information Difficult to quickly compare alternatives Cost prohibitive

7 Communicating with Manufacturers
Quicker turnaround Take advantage of all available information Design can be more fluid 80/20 Rule Easier for manufacturers to react and perform Manufacturers are becoming part of the project team Can react and propose ideas for construction that may enhance the project. i.e. modular erection

8 Using Revit to Communicate with Manufacturing Tools
Manufacturers use many different tools in their day-to-day operation MRP CNC Field Clash detection Scheduling In-house Design models and manufacturing models are DIFFERENT How do you bridge the gap? MRP-StruMIS, Fabtrol, Fabsuite CNC- Machinery, plate nesting

9 What is SDS/2 Connect? Add-in to Revit Structure developed by Autodesk Partner, Design Data SDS/2 connection design, complete with longhand calculation Includes model roundtripping with the Revit Structure model Overview Video

10 The Value of Connections in Revit
Quick access to connection design calculations Value Engineering in Revit Quickly test connection scenarios Full joint analysis An API based model transfer between Revit and SDS/2 for BIM. Structural & connections Works better than IFC or CIS2 for connections and structural components

11 SDS/2 Connect Tour

12 SDS/2 Connect: Help Menus
Includes a connection guide In-depth explanation for how connections are designed in SDS/2 Connect Topics > Connections > Connection Design

13 SDS/2 Connect: Tools Options Setup Family & Material options
Revit Optimization Import CXL loads Imports loads from CSC Fastrak Settings for moment and shear loads For Revit loads, SDS/2 Connect can use the stored in Revit Structure

14 Example of Setup screen for connection design

15 Video of CSC Import

16 SDS/2 Connect: Tools Edit
Edit a single connection through a user interface Select nodes or connection materials to access interface Report Generate calculations to verify connections Expanded calculations with “show our work”

17 Example of expanded design calculation

18 SDS/2 Connect: Tools AutoStd Applies connections to selected members
Can be changed to various connection types Design All Will design all connections on a project This can be limited to design only pre-designed connections

19 SDS/2 Connect: Tools Export
Exports the Revit Structure model to SDS/2 Detailing Several options provide fullest control over export Import Populates a new structure Updates an existing model Imports connections from detailer

20 Connection Design with SDS/2 Connect

21 Connection Design Framing Conditions Connection Specifications Loads
“Intelligent Connection Design” User Connections

22 Framing Conditions Auto Standard Connections Based on Setup
Connection type is determined by software Specified Connections Chosen by user System can override if necessary due to erectability or clashing

23 Loads Loads can be input or automatically set
Loads can be imported from CSC Fastrak If loads are stored in Revit Structure they can be used Revit currently only stores shear loads Changing loads may affect: Bolt Diameters Plate thickness & size Weld design Number of bolts

24 Connection Specifications
Gives users added control over: Safety Connections Attachment methods Near/Far side attachments Many other connection variations

25 Intelligent Connection Design
Considers fit-up and constructability as a part of connection design System will help redesign connection when possible Changes in framing condition cause connections to update automatically

26 User Connections Override system designed connections
Meet specific design requirements Cross-dependent entry fields update items related to the original change

27 User connection fields become editable with check box

28 Examples of more complicated connections

29 SDS/2 Connect: Technical Details
Initialization of the SDS/2 Connect Add-in will modify Revit Structure families Enables material operations necessary for connections, like copes Post-initialization, the file can be saved as a template, saving time on future projects. Custom Families are not addressed during initialization Usually have to be manually mapped Check Project Find undesignable members Searches out and identifies any material that hasn’t been mapped Custom Families are mapped by the user via the Material file Mapping tool

30 SDS/2 automatically modifies families during initialization
SDS/2 automatically modifies families during initialization. Users have access to map materials for some families manually.

31 SDS/2 Connect: Technical Details
SDS/2 Connect modifies these families: Wide Flange L-Angle LL-Angle W-Tee Channel HSS Rectangular Pipe HSS Round Modifications include adding the ability to add copes and other connection related material operations

32 SDS/2 Connect: Technical Details
SDS/2 Connect adds these families: Plate Angle RoundPlate Bolt StandardBolt StandardBolt Array BentPlate Specifically related to connection materials

33 SDS/2 Connect: Technical Details
Tips for improving Revit Structure performance: Avoid fine grain views Skip generating bolts Connections are still designed with bolts, simply not shown to speed up the model Holes and welds are not shown in Revit Structure Connections are still designed to include this information and will be visible once sent to SDS/2 Detailing

34 Welds are not shown in Revit, but are included in connection design

35 Potential Workflows with SDS/2 Connect

36 Connection Sketches Sketch Tool Quickly generate connection sketches
Design calculations are automatically provided Tags for some connection materials are available Create sketches from the actual model Create sketches from modeled framing conditions

37 Connection Scenarios Create connection scenarios
Quickly access calculations Test various configurations Choose best connections Perform target value costing/design In this usage of SDS/2 Connect is simply a connection design aid

38 Workflows Three “Paths” for Model-Based Connection Design
SDS/2 Connect can perform a one time model transfer like IFC or CIS/2 Currently only includes major structural members and connections Export model as a starting point for Detailer/Fabricator (D/F) to design connections and be imported back to Revit Structure Engineer designs specific connections that will appear in D/F model upon import Could be 10% of connections or 100% in the structure

39 Round-Tripping Round-tripping provides opportunity for communication through the model Better way to maintain model integrity Improves communication through models Integrates manufacturing-level information in the Revit Model Brings you closer to LOD 400

40 Connection Optimization for Design
Aesthetic vs. Structural considerations Union Pacific building in Omaha, NE Expansive glass façade Oversized Gussets required by design block natural light Can be avoided with early connection design and optimized connections Vital in TVD or Target Costing Cost savings on smaller section sizes may be lost when it comes time for connections Doublers, stiffeners and welds add up! Video example

41 Optimizing Connections for Manufacturing
Material choices matter! Bolted vs. welded Stock materials Example: Design calls for some shear connections to be 3/8” thick and some ½” thick. The fabricator may have surplus ½” thick bar stock and request that all shear connections are ½” thick. While they may be a little overdesigned, they can be manufactured at a lower cost. Engineering software may design structures choosing a variety of section sizes that may not be optimal for ordering. Choosing same depth sections when possible to optimize mill order SDS/2 links to MRP products that look at inventory schedules and can see what steel is readily available and what requires a mill order This can also help shorten timelines

42 Optimizing Connecitons for Manufacturing
The Rise of Shop Technology Becoming more like the auto industry CNC equipment & Robots The influence of new technology vs. old Example: WTee Shear connections Hole locations vary based on beam web thickness 5 1/2” Gauge is constant, but hole locations shift side to side CNC technology enables these connections to be efficient These connections would slow down shops that do not have CNC

43 Pre-Construction Bids and BIM
Engineer exports design model via SDS/2 Connect to Detailer/Fabricator’s SDS/2 model. Once imported to SDS/2, advance BOM’s can be obtained in minutes Connections are immediately designed, revealing opportunities for value engineering Changes to the structural model can be made and updated anytime, allowing for a quicker response

44 Pre-Construction Bids and BIM
Communication between pre-construction and as-manufactured models impacts: Accuracy of material take-offs Elimination of duplicate information Shorter turnaround from design to fabrication Value engineering starts earlier in the process Detailing can start earlier in the process (Early Steel Detailing) Immediate feedback with connection calculations Reduces steps required to obtain shop drawings

45 SDS/2 Connect Frequently Asked Questions

46 SDS/2 Connect: FAQ’s Difficulty applying and designing connections
3 common causes / solutions Export Warnings Revit Loads Tagging

47 SDS/2 Connect FAQ: Designing Connections
Beam or column is not recognized as a connectable member Structural usage is not set correctly To verify this, use “Check Project” command to locate undesignable members Correct structural usages Beams: Girder, Joist or Other Vertical braces: Vertical Bracing Horizontal braces: Horizontal Bracing

48 SDS/2 Connect FAQ: Designing Connections
Families may have been incorrectly modified Common when using custom families May not have been recognized during initialization This is corrected through the Material File Mapping window in setup Select custom family Choose section type Material file source Sections to be mapped Select “Modify this Family” check box

49 SDS/2 Connect FAQ: Designing Connections
Structural failure SDS/2 Connect will not design connections when: The desired connection isn’t physically possible Setup options like maximum plate thickness, max bolt diameter can come into play here High loads require more rows of bolts than the beam can hold The connection can’t be erected A connection is not yet supported This can be overridden to some extent in SDS/2 Connect and fully in SDS/2 Detailing

50 SDS/2 Connect FAQ: Export Warnings
“Project name is current against this file” User has exported the model twice containing no changes between the two exports Exports generated without importing an update between them Update was imported, but contained no changes More commonly, Libraries are set up incorrectly This issue is common in Revit Structure 2012

51 SDS/2 Connect FAQ: Export Warnings
Open Options in Revit, select the File Locations tab, and choose Places Library names should be: Imperial Library Metric Library

52 SDS/2 Connect FAQ: Revit Loads
SDS/2 Connect can import member end and moment loads from CSC’s Fastrak Building Designer SDS/2 Connect can read member end reactions stored in Revit Structure Newer feature to SDS/2 Connect Shear loads for beams are the only load that Revit Structure stores currently

53 SDS/2 Connect FAQ: Tagging
Users can tag plate descriptions and angle sizes only Done via a unique family created by Design Data 2013 version will include the tag families by default 2013 version will also add simple bolt descriptions Currently you can to get the family For more detailed drawings of connections, the model can be sent to SDS/2 Detailing

54 SDS/2 Connect: 2013 Enhancements
WTee and Channel are added as connection materials Channel column splices Smaller Vbrace connections WTee shear connections Connection Find tool Searches & filters connections according to certain parameters Bolts can be created individually

55 Doug Evans Michelle McCarthy

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