Investigation and Repair of Structural Deficiencies in Projected Masonry Bay Construction
Publication: Journal of Performance of Constructed Facilities
Volume 25, Issue 2
Abstract
Projected masonry bays are a common feature on many historic buildings. Over the course of the last 100 years or so, bays have been constructed utilizing a wide variety of masonry and framing configurations to provide structural support to these eccentric architectural elements. Mechanisms to resist the natural tendency of the bay construction to “sag” and/or rotate away from the plane of the wall have historically included corbelled and/or cantilevered masonry, steel tension ties, counterweight beams, and a variety of steel, concrete, and wood framing configurations. Many of these support system mechanisms have satisfactory in-service performance, whereas others have been found to permit undesirable behavior. Unanticipated flexibility in the bay support may result from improper interaction of the various structural components. Distortion of the bay construction leads to distress, premature deterioration, and sometimes failure within the bay assemblies. This paper will present a case study pertaining to the investigation, analysis, and repair of a projected masonry bay system involving several different support mechanisms and will focus on a specific structure in which effective support assemblies were integrated into the existing building fabric.
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References
Brick Industry Association (BIA). (2001). “Technical note 36A—Brick masonry details, caps and copings, corbels and racking.” Technical Notes on Brick Construction, Rev. Sept./Oct. 1981, reissued February 2001, BIA, Reston, VA.
Coll, K. S., and VanOcker, D. (2007). “Case history of the use of electronic survey techniques to assess planar distortions in building facades.” J. ASTM Int., 4(8), 3–11.
Curl, J. S. (2006). Oxford dictionary of architecture and landscape architecture, Oxford University Press, Oxford, UK.
Wooten, J. (1971). “Wooten’s third law and steel column design.” Mod. Steel Constr., 11(2), 10–12.
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© 2011 American Society of Civil Engineers.
History
Received: Dec 17, 2009
Accepted: Mar 27, 2010
Published online: Apr 8, 2010
Published in print: Apr 1, 2011
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