Indicadores Directos de Tensión
2012 Construcción Metálica Ed.16, Colombia
Rodrigo Delgado Charria, author of this article, designs and builds
Steel buildings and industrial complexes in Colombia since 1986. He is a member of AISC,
president of Fedestructuras Valle, former professor of structural design for postgraduate students
at Valle University, also taught structural design for architects at Buenaventura University.
Rodrigo and his family reside in Cali, Colombia. A must read for Spanish speakers.
Time Study on Cost Savings using DTIs Compared to Calibrated Torque Wrench Tightening
Recently reanalyzed by Rowan University in New Jersey USA, this study extrapolated data gathered in London England in 1970 by a top consulting engineering firm, a steel fabricator and time and motion consultants, and applied the data to current wage rates. The Calibrated Wrench method was applied as it is used in the EU. The savings in labor cost using DTIs exceed the current cost of DTIs in both the EU and USA.
Fatigue tests on DTIs
1960s Research conducted by British Welding Research Institute, Abington Hall, Cambridge, England.
New Generation Direct Tension Indicators
Article in New Steel Construction magazine, UK describes development of new generation DTIs in USA. Jan-Feb 2004 issue, by Roger Reed, Technical Manager of Thomas William Lench Ltd.
Report using DTIs on seismic isolators
Research report for the National Science Foundation in 1993 on a Slotted Bolted Connection Energy Dissipater design using DTIs and published by The University of California at Berkeley in Steel Tips Magazine.