<P>60The Military Engineer l November-December l 2009 Civil 3D are helping designers and con- tractors ?nd the best ?t, allowing cli- ents to make smart budget decisions. This type of cost modeling became immediately valuable in the pre-award planning stages of the Fort Knox Hu- man Resource Center of Excellence at Fort Knox, Ky. The design team devel- oped a modi?ed double-chevron build- ing solution and presented it to the military as a more cost-effective design than what was proposed in the original request for proposals. By performing an analysis of the ex- isting site, we could better integrate a new data center, dining facilities and other buildings, Bakri said. This change alone signi?cantly reduced equipment, labor and material expenses by mini- mizing the need for costly earthwork. Improving Design Documentation By their very nature, 3D models are visual tools. Combined with BIM data, they are helping to provide new immer- sive testing environments for facility owners and users. For the Fort Lee (N.J.) Central Cam- pus Complex project, we inserted BIM information into a gaming engine so instructors could conduct virtual walk- throughs of classrooms and laborato- ries, said Mark Rengel, HNTB Senior Project Architect. This capability not only allowed us to provide precise depic- tions of complex spaces such as welding bays, it also permitted instructors to in- teract with the spaces and provide feed- back early in the design process. BIM also improves coordination and collaboration among multiple design disciplines. Mechanical, structural, electrical and plumbing engineers, as well as architects, building contractors and owners can be engaged early in the process using a timeline-based model. Work can be viewed independently or coordination with other disciplines by overlapping models such as structural and mechanical. According to Bakri, real-time coordination and early col- laboration using Autodesk Revit Ar- chitecture software and HNTBs Pre-D Notes helped speed the Fort Lee project from award to start of construction in less than ?ve months. Beginning in 2008, facilities con- tracted by the U.S. Army Corps of En- gineers and U.S. Naval Facilities Com- mand have been mandated to achieve, at minimum, the Silver level of certi?- cation under the U.S. Green Building Councils Leadership in Energy and En- vironmental Design (LEED) program. BIM models are being applied increas- ingly to help document the LEED cer- ti?cation process, such as in one chal- lenging proposal for the Third Army Headquarters at Shaw Air Force Base, S.C., that included secure work areas below ground. To achieve the mandatory LEED daylighting credit, a U-shaped build- ing was proposed, said Eddy Krygiel, HNTB Sustainability Manager. In or- der to locate programmed areas on the ?rst ?oor with direct access to other areas, a thin ?oor plate was proposed to provide perimeter daylighting. Ad- ditionally, the use of commercial- grade light tubes on the interior of the U shape extended daylight to employ- ees in the secure operations areas. Us- ing Autodesk 3D Max, we were able to simulate and con?rm the design would earn the LEED credit. Streamlining Construction BIM clash detection applications pro- vide a view inside the walls of a build- ing to visualize systems and equipment such as pipes, ducts and structural el- ements, allowing con?icts to be easily identi?ed and solved before they mani- fest on the job site. At the Fort Lee Cen- tral Campus, the project team identi?ed and resolved an issue with the place- ment of electrical and telecommunica- tions facilities. Underground utilities are not typi- cally modeled, so the extra step in ap- plying 3D modeling to electrical and telecommunication duct banks helped prevent major rework, Rengel said. The alternative would have required extensive rerouting above ground or foundation modi?cations. Either alter- native would have drastically escalated costs and delayed the project. By iden- tifying the issue early, the electrical and telecommunications facilities were re- con?gured before the building founda- tions were set. Prepared for Tomorrow Recent studies show operations and maintenance account for approximately 60 percent to 85 percent of a buildings total cost of ownership. Partly to blame are inef?ciencies, such as when data are manually reentered or paper-based plans are found to be inaccurate. When BIM data is provided, maintained and updated in the database, BIM has the ability to continue providing value as a facility management tool. For example, BIM data can track when materials were installed and when they are due for re- placement. The long-predicted evolution to an integrated design, build and manage- ment process using 3D technology is becoming a reality. In the near future, building designers, engineers and man- agers will rely on 3D visualization and sharing tools and data in every aspect of their work, from design conception to proposals and in all deliverables. It will be common for designers, en- gineers and clients to walk through and interact with designs virtually. Eventu- ally, a buildings 3D design and data will be integrated even more seamlessly into the BIM data of the surrounding utilities and roadways, allowing comprehensive studies of how all three interact. Already 3D visualizations and BIM data allow users to conduct energy analyses, sun studies, speci?cation management, constructability analy- sis, trade coordination, clash detection and cost estimation. As BIM processes evolve, more users also will begin using BIM as the cornerstone of a 4D con- struction planning process. By includ- ing schedule data in a BIM design, a buildings design will not only serve as a virtual blueprint for its construction, but also as a management tool to over- see the progress of the project. Ultimately, BIM represents a para- digm shift in how design, construction and management are undertaken. Once its value is recognized, theres no telling what additional uses will be conceived of years into the future. Bradley Schulz, M.SAME, is Vice President, Federal Architecture Market, HNTB Architec- ture; 202-628-7525, or bschulz@hntb.com.</p> <UL><LI><a href="http://www.stallionpublishers.com/publication/18/oigsnclgz/1/1/">Cover-Page</a></LI> <LI><a href="http://www.stallionpublishers.com/publication/18/oigsnclgz/2/2/">Inside-Cover</a></LI> <LI><a href="http://www.stallionpublishers.com/publication/18/oigsnclgz/3/3/">Page-1</a></LI> <LI><a href="http://www.stallionpublishers.com/publication/18/oigsnclgz/4/4/">Page-2</a></LI> <LI><a href="http://www.stallionpublishers.com/publication/18/oigsnclgz/5/5/">Page-3</a></LI> <LI><a href="http://www.stallionpublishers.com/publication/18/oigsnclgz/6/6/">Page-4</a></LI> <LI><a href="http://www.stallionpublishers.com/publication/18/oigsnclgz/7/7/">Page-5</a></LI> <LI><a href="http://www.stallionpublishers.com/publication/18/oigsnclgz/8/8/">Page-6</a></LI> <LI><a href="http://www.stallionpublishers.com/publication/18/oigsnclgz/9/9/">Page-7</a></LI> <LI><a 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