Pall
Dynamics
Limited

Pall Dynamics Limited (PDL), founded in 1984, is dedicated to designing and manufacturing friction dampers with uncompromising emphasis on quality and integrity. Over the years, Pall Dynamics has earned an international reputation for excellence and is a world leader in friction dampers for seismic control.

Inspired by the principle of friction brake, Dr. Avtar Pall, a structural engineer, pioneered the development of Pall Friction Dampers for the seismic control of buildings. Pall Friction Dampers significantly reduce the initial cost of construction while dramatically increasing the earthquake resistance against damage.

Friction dampers for buildings must possess reliable and stable performance over the life of building. Developing a reliable friction is very difficult and tricky. Over a period of more than a decade of research and development, the common problems in friction were successfully overcome by using specially treated surfaces and a unique manufacturing process.

Pall Friction Dampers have successfully undergone rigorous proof testing in the U.S and Canada. In 1985, the National Research Council of Canada tested 3-story frame structures on a shaking table at the University of British Columbia, Vancouver. In 1986-1987, the U.S. National Science Foundation tested a 9-story frame structure on a shaking table at the University of California at Berkeley. The structures were subjected to more than 20 different major earthquake records. Even for an earthquake 5 times stronger than the 1985-Mexico earthquake, the frames equipped with friction dampers remained damage free.
Pall Friction Dampers are well recognized and accepted by building codes in Canada, the U.S and other countries.

The first building with seismic dampers in North America was built with Pall Friction Dampers (1987). Pall Friction Dampers are finding increasing application worldwide for new construction as well as for retrofit of existing buildings. They have been used for the seismic protection of more than 100 major buildings in Canada, the U.S., China, Iran, Colombia and India. Some of the building projects completed are:
  • U.S.A: Boeing Commercial Airplane Factory at Everett - the world's largest building in volume, and three Boeing Development Center Buildings at Seattle; Moscone Convention Center in San Francisco - California's largest project of 2001; ACC Sharp Hospital, San Diego; Monterey County Government Center; St. Joseph Hospital, Tacoma; 3-Million Gallon Water Tank, Sacramento.
     
  • Canada: Justice Headquarters, Ottawa; Nortel Laboratories, Ottawa; St. Vincent Hospital, Ottawa; National Defense Laboratory, Ottawa; Canadian Space Agency Headquarters, St. Hubert; Casino de Montreal; Provincial Police Headquarters, Montreal; Palace de Congress Expansion, Montreal; St. Justine Hospital, St. Luc Hospital and Jewish General Hospital in Montreal; Concordia University's Library Building and Engineering / Computer Science / Visual Arts Building, Montreal; Life Science Complex, McGill University, Montreal. 
     
  • Others: Canadian Embassy in Beijing, China; Canadian Embassy in Tehran, Iran; Gardenia Complex, Gurgaon, India; Hospital TUNAL, Bogota, Colombia.
   
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