Building Information Modeling Overview SUBMITTED BY: Brian K. Smith LJT & Associates Inc. 9881 Broken Land Parkway Suite 400 Columbia MD, 21046 Brian.Smith@ljtinc.com
EXECUTIVE SUMMARYLJT & Associates, Inc., chartered in 1994, is a diversified engineering services companyheadquartered in Montgomery, Alabama, and operated out of our Columbia, Marylandoffice. A small, veteran-owned disadvantaged business, LJT is certified by the U.S.Small Business Administration as a SDB firm through May 2011.LJT holds a Top Secret Facility Clearance and has more than 200 employees nationwideproviding system engineering, sustaining engineering, launch operations support, andgeneral engineering and administrative support to the U.S. Navy, the U.S. Air Force, theDefense Information Systems Agency (DISA), the National Aeronautics and SpaceAdministration (NASA), the Internal Revenue Service (IRS), and the National ScienceFoundation (NSF).Over the last five years, LJT has and continues to support a variety of critical functionsassociated with the United States Navy that includes Geographical Information Services,Information Technology Support, Anti Terrisom Force Protection and BuildingInformation Modeling. During this tenure, LJT has developed an experienced team ofprofessionals with many years of GIS, BIM, engineering, and program managementexperienceBIM ME UP SCOTTY!In the Architecture, Engineering and Construction (AEC) industry, Building InformationModeling (BIM) has been a buzz-word for quite a while. Integrating the results of BIMwith a Geographic Information System (GIS) will be the way everyone involved in thedevelopment, maintenance and management of land, buildings and asset information willcommunicate.First off, how did we get here and what is BIM? BIM is an enormous milestone on thetimeline of how we communicate information about a structure. Many years ago, thiswas done mainly by hand as architects and engineers drew construction documents onlinen, vellum and mylar. In the early 1980’s, 2D Computer Aided Drafting (CAD)systems were beginning to emerge. CAD drafting is essentially manual drafting on acomputer. The CAD Technician would draw lines, arcs, circles and text to represent thenecessary information.In the late 1980’s came the ability to create a 3D model on the computer. This wouldallow the industry to better visualize the design and solve issues that may have not beenapparent until actual construction. 3D modeling quickly evolved into Object Basedmodeling. Here, for example, if an architect was developing a commercial building,instead of electronically drawing lines to represent a wall or a door, he would “add” a“wall system” or a “door system” to the model. The model would know and understandhow to incorporate the wall or door with the other information in the model. Now themodel is starting to have some intelligence. Another example would be as the architectdevelops spaces within a model, he can associate other information that could range from
wall/floor finish information, information about the occupants of the space or engineeringdata that would be used in calculating heating, cooling and lighting requirements.BIM, in it’s most simple form, is the act of combining non-graphical (or tablature)information to graphical information (CAD model or object) to better understand thedesign and purpose the object. Utilizing advanced BIM software and procedures,architects and engineers use the BIM platform to solve many design and engineeringissues such as structural analysis, real time cost estimation, mechanical electrical andplumbing engineering, sustainable design, virtual reality visualization, etc. Theconstruction industry can take advantage of the 4D (time) aspects of BIM. Beforeconstruction begins, material staging, equipment placement, etc. can all be orchestratedand tested before the first truck drives onsite. Where the development of constructiondocuments was once the goal of the CAD technician, construction documents are now abi-product or “report” of the BIM model.BIM is certainly here to stay. The industry is responding with standards, ownershipoutlines and specialized consulting. Many developers and owners are specifying howBIM shall be used in their current and new projects. In FY08, a BIM deliverable isrequired for all military construction projects. Other facets of BIM are starting to emergesuch as Building Lifecycle Management which enjoys a single BIM model from designto space planning and facility management. Integrated Design techniques are also beingdeployed which allows many groups or disciplines to collaborate on a single BIM model.BIM is not just for new ConstructionMuch of the BIM discussion has been centered on new construction. What about thethousands of existing structures? Focused on government applications, groups withinLJT & Associates are developing an “As-Built BIM” procurement processes. Thisframework incorporates cutting edge laser scanning of facilities to develop a precise 3Dmodel as well as traditional in-person analysis to populate current spatial information andconnect to existing facility databases. Once established, the information collected andincorporated in BIM can significantly aid in operation and maintenance of the facility.LJT & BIM/Space ManagementNAVFAC MidAtlanticNAVFAC MidWestNAVFAC HawaiiNAVFAC NorthwestReturn on InvestmentIt is apparent we are diving much deeper into the information age. Organizations areenjoying an ever increasing ROI of 10 to 25% for BIM systems that are properlyimplemented. Processes are now being developed to access and integrate the vast amountof BIM data associated with individual structures into GIS. By combining standardimagery and feature classes that traditionally make up the GIS structure with the logicaland analytical BIM information, everyone that plays a part in the development,maintenance and management will benefit immensely. Soon hunting through mounds of
paper drawings to gather information about a parcel or structure will be a thing of thepast.About the AuthorBrian K. Smith is a CAD / GIS Analyst at LJT & Associates and has more than 20 yearsexperience in architectural CAD and visualization systems. Prior to his role at LJT &Associates, Mr. Smith was a project manager and technology consultant for a leadingAutodesk software solutions provider. He is located in Virginia Beach, Virginia.