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Re: Concrete Freezing (AKA "only plumbers")

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Yes, you did.  Apparently the building showed signs of collapse as the weak 
frozen concrete started to thaw but then nothing happened so the plumbers 
went into the first story to get tools and it all came down like a rock.  I 
should say half of it came down; the other half of the building, on the other 
side of the central elevator core, didn't.  This was about 30 years ago (but 
concrete v. freezing probably hasn't changed a lot in the interim). 

Ralph Hueston Kratz, S.E.
Richmond CA USA

In a message dated 12/6/01 7:00:27 AM, glenn(--nospam--at) writes:

<< I'm glad it was only plumbers.  They were probably cutting holes through 

bottom of beams for their pipes! (Did I step in it again?)

-----Original Message-----

From: Rhkratzse(--nospam--at) [mailto:Rhkratzse(--nospam--at)]

Sent: Thursday, December 06, 2001 1:55 AM

To: h.d.richardson(--nospam--at); seaint(--nospam--at)

Subject: Re: Concrete Freezing

This sounds suspiciously like a building on Commonwealth Road (Street?)

in/near Boston.  Is it?  In any case that one came down so straight it


touch an adjacent building only yards away from it.  And the only fatalities

were several plumbers who went in to recover their tools just before it came


Ralph Hueston Kratz, S.E.

Richmond CA USA

In a message dated 12/5/01 12:49:20 PM, h.d.richardson(--nospam--at) writes:

<< 1.)  On a 16 story building, the roof slab (flat plate, approx. 6" thick)

was cast New Years Eve, about 1970 (party time, insufficient attention

to hoarding and heating).  This was a government owned project; the

owner had a full time inspector on site to monitor construction.  The

temperature went down below -20 F; and stayed cold until mid February.

The forms were removed and everything seemed fine.  When it thawed out

in February the slab collapsed!  Totally and completely!  It was mainly

ice which had held it together for 6 weeks.  The concrete behavior was

not unlike soft coal; with effort some of the pieces could be broken BY

HAND!  Needless to say the inspector and the site superintendent were

both removed from the project; one summarily, and the other discretely.


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