From: Michael [[log in to unmask]]
Sent: Tuesday, July 10, 2012 7:18 PM
> But, in this case, I would guess that the exposed party wall brick masonry system, exposed to weather,
> was subject to moisture infiltration that played havoc with the lime rich mortar - leaching out the lime,
> and then when the wall was painted had an even more difficult time transmitting interior moisture to
> the exterior, causing addiitonal mortar deterioration, and resulting in subsidence of the wall in general
> as the mortar joints lost mass.
We had an 1880s solid brick masonry building facade fall onto the downtown sidewalk one day. The through-wall roof drain scupper had been leaking at the corner apparently for some time, saturating the corner masonry from rooftop to ground level. Not only was the mortar gone, but the interior common brick had literally returned to muddy clay. You could reach in and play with the mud, squishing it through your fingers just like you did when you were playing down at the crick back in the days of yore.
> doomed this mother like a four-stack unsinkable ship in a North Atlantic ice field.
Did you know that only three of the stacks were actually operational? The fourth was a dummy, added for purely aesthetic reasons of balancing the ship's appearance (and also conveying an even greater sense of power).
D.
_____________________________________
Dan Becker, Division Manager
Long Range Planning Division
Raleigh Department of City Planning
One Exchange Plaza, Ste 300 (27601)
PO Box 590, Raleigh NC, 27602
919/516-2632 (v); 919/516-2682 (f)
http://www.raleighnc.gov
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