concrete collar

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concrete collar, doughnut

A collar of reinforced concrete which is placed around an existing column so that it can be jacked up; the shrinkage of the concrete causes it to grip the column firmly.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
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To replace a panel or add molded steps, you need to remove the old panel and the portion of the concrete collar behind it.
Few could argue the concrete collar created by those 1970s buildings and the whole of Paradise Circus has set the city back.
The Curzon regeneration is a chance to create 36,000 jobs and inject PS1.4 billion a year into the city economy - as well as vital work to break down the concrete collar stifling the east side of the city.
Central to its attraction are plans to pedestrianise swathes of Great Charles Street, breaking what has become known as the "concrete collar".
THERE is only one green space within the confines of what was Birmingham's old concrete collar inner ring road.
Paul Dale's report on breaking the "concrete collar" of the inner ring road (January 14) needs to be put into perspective.
AMAJOR property sale has been agreed opening up the prospect of more regeneration on Great Charles Street - as the unpicking of Herbert Manzoni's "concrete collar" continues.
For that, we have to thank Sir Herbert John Baptista Manzoni , the 'concrete collar' ring road visionary whose position in charge of Birmingham's engineeringworks from 1935 until 1963 gave him too much opportunity to knock down buildings we might well have treasured today.
I read with interest the article `Daring plan to break city's concrete collar' (Evening Telegraph, January 14).
While many of the buildings are currently vacant, it was seen as a strong investment opportunity because of its location on the cusp of the giant regeneration scheme which will see the "concrete collar" of the ring road curtailed.