Prepared by the Civil Engineering Research Foundation. This report identifies key engineering research and construction issues for the 21st century that support sustainable development. The report reflects the findings of a two-phase Delphi survey involving construction industry experts from more than 20 countries and was prepared to provide the technical context for an international research symposium that will be hosted by the Civil Engineering Research Foundation in Washington, D.C., on February 4-8, 1996. The intended audience includes worldwide representatives from government, academia and business involved in engineering and construction research. The report is organized around five focus areas: Management and Business Practices, Design Technology and Practices, Construction and Equipment, Materials and Systems, and Public and Government Policy. A team of international experts from engineering and construction disciplines author the five papers comprising this report. Each paper covers research needs and barriers to implementation of new technologies and practices. The papers explore opportunities for international cooperation, present case studies of successful research efforts and offer preliminary recommendations to enhance the effectiveness of research in their respective areas. The papers are preceded by an introduction that address the conceptual links among the papers within the context of sustainable development.