Keeping It Together

by Laurie A. Shuster, Managing Editor; ASCE World Headquarters, 1801 Alexander Bell Drive, Reston, VA,

Serial Information: Civil Engineering—ASCE, 2000, Vol. 70, Issue 3, Pg. 44-47

Document Type: Feature article

Abstract: A new framing system for precast concrete columns and beams will allow tall buildings to withstand large earthquakes without damage to the structural integrity of the building. By using a combination of high-strength post-tensioned steel strands that tie bays together, (post-tensioned) as well as mild steel rebar that stretches and then snaps back into place during a tremblor, Charles Pankow Builders has designed a column-beam connection that can not only save lives, but save the economic viability of the building as well. The company is using the new system in a low-rise structure in Los Angeles as well as the tallest precast concrete building on the West Coast, in San Francisco.

Subject Headings: Columns | Earthquake resistant structures | Frames | High-rise buildings | High-strength concrete | Post tensioning | Precast concrete | Structure reinforcement

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