GSA National 3D-4D-BIM Program



In 2003 the General Services Administration (GSA), through its Public Buildings Service (PBS) Office of Chief Architect (OCA), established the National 3D-4D-BIM Program. OCA has led over 30 projects in its capital program, and is assessing and supporting three dimensional (3D), four-dimensional (4D), and Building Information Modeling (BIM) applications in over 100 projects to date across the nation. The power of visualization, coordination, simulation, and optimization from 3D, 4D, and BIM computer technologies allow GSA to more effectively meet customer, design, construction, and program requirements. GSA is committed to a strategic and incremental adoption of 3D, 4D, and BIM technologies.

There is a progression from 2D to 3D, 4D, and BIM. While 3D models make valuable contributions to communications, not all 3D models qualify as BIM models since a 3D geometric representation is only part of the BIM concept.

Critical to successful integration of computer models into project coordination, simulation, and optimization is the inclusion of informationthe I in BIM to generate feedback. As a shared knowledge resource, BIM can serve as a reliable basis for decision making and reduce the need for re-gathering or re-formatting information. GSA is currently exploring the use of BIM technology throughout a projects lifecycle in the following areas: spatial program validation, 4D phasing, laser scanning, energy and sustainability, circulation and security validation, and building elements.

For all major projects (prospectus-level) receiving design funding in Fiscal Year 2007 and beyond, GSA requires spatial program BIMs be the minimum requirements for submission to OCA for Final Concept approvals by the PBS Commissioner and the Chief Architect. At the same time, all GSA projects are encouraged to deploy mature 3D, 4D, and BIM technologies spatial program validation and beyond at strategic project phases in support of specific project challenges.

General Services Administration (GSA) National 3D-4D-BIM Program

One of the highlights of the GSA National 3D-4D-BIM Program is:

Publishing BIM Guide Series:

  • Series 01 3D-4D-BIM Overview
  • Series 02 Spatial Program Validation
  • Series 03 3D Laser Scanning
  • Series 04 4D Phasing
  • Series 05 Energy Performance and Operations

Formulating additional BIM Guide Series:

  • Series 06 Circulation and Security Validation
  • Series 07 Building Elements
  • Series 08 Facility Management


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