by Dave Guadagni

Answer for Last Week's Puzzler

In older buildings with thin-stone anchorage systems using carbon steel shims and anchors, the sealants occasionally fail and the steel can corrode.

Which statement correctly explains this?

a) The corroded steel is greater in volume than uncorroded steel, and joints inadequate to accommodate this volume increase sometimes fail.

or

b) The corroded steel is lesser in volume than uncorroded steel, and connections become loose due to the volume decrease and sometimes fail.

Answer: 

a). Corroding steel expands in volume and can put pressure on joints.

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The answers to this week's puzzler will be published here next week.

Dave Guadagni, AIA, is an architect with Robertson/Sherwood/Architects

Quizzical Pursuit is Copyright 2000, Dave Guadagni.