Productivity through CIS/2 electronic data exchange format for steel structures - Invited Presentation

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Productivity through CIS/2 electronic data exchange format for steel structures - Invited Presentation

Productivity through CIS/2 electronic data

exchange format for steel structures

Presented at 2010 Canadian Institute for Steel Construction (CISC) Annual Convention, June 9-12, Kananaskis, AB

Ajit Pardasani

Acknowledgments

• Jitender Singh, The Walter Fedy Partnership, Waterloo • Terry Graf, Spencer Steel Ltd., Ingersoll

Outline

• Introduction, NRC

• Construction Process Inefficiencies • CIS/2

• Potential Savings • Barriers

National Research

Council

• National organization, federal government agency

• Over 4,200 full-time employees; over 1,446 guest workers • Labs and facilities across Canada

• Dissemination of S&T information to industry and scientific community

• Provides essential elements of national S&T infrastructure

The NRC Centre for

Computer-assisted

Construction Technologies

• Part of NRC Institute for Research in Construction

• Research and develop construction process technologies critical to address four issues in construction industry:

– the need to improve productivity – changing workforce demographics

– growing complexity of built environments – sustainable development

Construction Process

Inefficiencies

• Total Cost : $15.8 billions to U.S. Capital Facilities.

• Inefficiencies result from:

– Fragmented nature of industry

– Continued reliance on paper-based information systems resulting in manual reentry of data,

– Legal Contracts

• Solution: Interoperability - ability to exchange information Project

Conception

Project Delivery

Design Fabrication Operation/

Maintenance

Analysis Design Detailing

CIS/2

• CIMSteel Integration Standards (Version 2)

• Born out of the Eureka CIMsteel Project in 1998

– 10-year, $50 million, 70 organizations, 9 European countries.

• CIS/2 captures all information related to:

– Design, analysis, procurement, fabrication planning, fabrication automation, and the erection.

– Open standard, integrates the flow of information

CIS/2 structural steel

shapes

Source: Details of the mapping between the CIS/2 and IFC product data models for structural steel, January 2009 at http://www.itcon.org/2009/01

CIS/2:

Three Model

Views

Finite Element Model Fabrication Model

Potential Savings

Data Exchange with

CIS/2: A use case

Detailing Fabrication NIST VRML Translator Detailer Fabricator Fabtrol SDS/2 Design Analysis Structural Engineer RAM Structural CIS/2 KISS CIS/2 CIS/2 Verification VRML Viewer VRML

CIS/2 Integrates the

flow of information

Seamless flow of information leads to savings throughout the project

• Eliminate the need to re-input data

• Reduce errors by providing an accurate transfer of member sizes and locations

• The hours spent on checking for errors are greatly reduced • Erection could begin sooner

• Occupancy could occur earlier.

How much savings?

• Most savings occur in detailing

– 20% to 40% (AECbytes "Building the Future" Article (July 27, 2005)

• Savings are affected by accuracy of the Engineering Model

– Less accurate models will see more time spend in correction during the detailing

Project Size Software Schedule

Savings Presbyterian Hospital, Albuquerque, NM 150,000 sq. ft 1,200 tons RAM Structural System and SDS/2 8 weeks Baptist West Hospital in Knoxville 350,000 sq. ft RAM Structural System and SDS/2 4 weeks in detailing, 7 weeks total Casino of the Sun in

Tucson

Benefit of CIS/2 for

Steel Fabricator

CIS/2 supports fabrication

automation

• Quicker Quotation • Faster Detailing

• Earlier Materials Ordering • Reduced Errors.

• Supports NC Fabrication

– Bending, cutting, drilling, welding

Digital Fabrication

Robot Programming with CIS/2 (Example)

• StruCIM® (http://www.strucim.com) uses CIS/2 to import

assemblies from a manufacturing model.

Visualization of CIS/2

Model

• The NIST CIS/2 VRML translator imports CIS/2 files

– Exports VRML that can be viewed:

• In a VRML Browser

• In a web browser with VRML plug-in

– Exports IFC files that can be:

• Imported into many IFC viewers and CAD programs. • Converted to a DWG file imported into AutoCAD.

CIS/2 vs. IFC

CIS/2

• CIS/2 format integrates the

design, analysis, detailing, and fabrication processes vertically. • CIS/2 more expressive than IFC

for structural steel silo • CIS/2 supports detailed

fabrication models

IFC (Industry Foundation Classes) • Developed to serve the needs

for most architectural, GC, and FM

• Integrate the different design disciplines horizontally

• Lacks complete representation of structural eng.

• No distinction between design and detailed model

Integration of CIS/2, material handling and location data

Bill of Materials Web-server Material Handling wi-fi Location Data Fabricator/Construction Site CIS/2 Bill of Lading CSV Detailed Model

Prototype for Tracking

Structural Steel

Current Functionality

 Runs in a web browser  Shows location of a

piece on a map or a land survey

 Informs user if the piece is in the trailer  Capability to generate quantities payable  Applications in construction and maintenance projects.

Barriers to adoption

Logistics

Barriers:

• Design, fabrication, and erection of steel are concurrent activities in many projects

– Exchange of paper drawings more flexible

Solution:

Technical (1)

Barriers

• CIS/2 is not being universally implemented in same way in all steel design/analysis software.

• Confidence in Technology (Accuracy of import/export)

– Some Reported Errors at CIS/2 Google Group:

• Translation Errors e.g. Lost Members, Misinterpretation, Lost Data • Orientation Errors e.g. Wrong location/orientation of an element

– Some software implementations are better and more complete, and some have bugs

Technical (2)

Design and Analysis

Software

Detailing Software

Solution:

Business Model

Barriers:

• Current Business Model do not support EDI

• Only paper as a valid mechanism of information exchange. • No long existing terms of standard practice exist for EDI Solutions:

• Contract Documents that will allow for data in electronic format to be the deliverable

• Appendix J in Code of Standard Practice by CISC provides guidance for use of digital models

Compensation Issues

Barriers:

• Similar to other applications of EDI, benefits accrue through out the project life cycle.

• More time to create accurate design models

– Corrections on paper drawings can be quickly made

• Design-Bid-Build Projects – how to share benefits? • Compensation issues

Solutions:

– Negotiations, Guidelines, Engineers could save time during reviews

Legal Issues

Barriers

• Who is responsible for errors in the product model? • Ownership of Data

• Traceability of Changes Solutions:

Integrated Project

Delivery

References

• CIMsteel Integration Standards, www.cis2.org

• CIS/2 and IFC - Product Data Standards for Structural Steel (http://cic.nist.gov/vrml/cis2.html#IFC)

• Cost Analysis of Inadequate Interoperability in the U.S. Capital Facilities Industry. Michael P. et. al. NIST GCR 04-867

• The CIS/2 Format: Another AEC Interoperability Standard,

http://www.aecbytes.com/buildingthefuture/2005/CIS2format.html

• Interoperability and the construction process, A white paper for building owners and project decision makers, Coleman, G.S. AISC

• American Institute for Steel Construction, http://www.aisc.org • Utilizing Interoperability & eCommerce,

http://www.aisc.org/template.cfm?template=/ContentManagement/ContentDisplay.cfm& ContentID=31814

• Building Better, Modern Steel Construction, June 003

NRC Construction:

Bringing Quality to the

Built Environment