The scoring is "supposed" to control cracking, primarily shrinkage but also
minor displacement. As you said the score lines are too shallow. As I recall
the scoring needs to be at least 1/3 through the concrete.
Thanks,
Eric Hammarberg
Vice President
Thornton Tomasetti
51 Madison Avenue
New York, NY 10010
T 917.661.7800 F 917.661.7801
D 917.661.8160
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This message sent from Treo, please pardon spelling and other mistakes.
-----Original Message-----
From: [log in to unmask] [mailto:[log in to unmask]]
Sent: Wednesday, May 23, 2007 05:37 PM Eastern Standard Time
To: [log in to unmask]
Subject: [BP] "on the sidewalks of new york" construction query
In New York, sidewalks are typically laid in large hunks, say 20 x 30 all at
one pour, each section separated from the other by that tubular stuff, I
guess for expansion and contraction.
But, within each larger pour, the concrete is invariably scored to produce
imitation "flags" of about 5' x 5'. I dimly recall that the 5' x 5' scoring
is a city requirement, but what is the ultimate thinking behind it? Cracks
seem to ignore the score lines, frequently passing through them without
deviation. The scoring is too shallow to concentrate run-off.
Christopher
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