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RE: Hobe Sound building collapse
- To: <seaint(--nospam--at)seaint.org>
- Subject: RE: Hobe Sound building collapse
- From: "John C. Jones" <john(--nospam--at)struct-engr.com>
- Date: Thu, 5 Aug 2004 16:57:53 -0500
didn't really see any vertical shoring. It all seemed to be
diagonals. I usually see way more verticals than diagonals on
projects. Could they have been trying to kill two birds with one shore
(pun not intended) and not adequately connected the shore for thrust
John C. Jones, PE
Having looked at the photographs at the website, the most
likely cause is inadequate shoring at the lower levels. It's unlikely the
loads were greater than anticipated and there appears to be sufficient rebar
(although it's impossible to judge the cover, exact
quantity, spacing or compliance with design).
Other possibilities could be ground movement, foundation
failure, accidental impact of a support, poor concrete (lower levels, of
course) and insufficient bracing.
Perhaps someone else would like to venture another
----- Original Message -----
Sent: Thursday, August 05, 2004 08:27
Subject: Hobe Sound building
Any armchair forensic engineers care to
speculate as to why this accident occured? Two workers were killed while
pouring a third floor concrete deck. There were workers comp violations and
a 13 year old boy was working on the project with his father. There is
a 30 frame picture gallery at this link. Perhaps some of you with experience
in this kind of construction can offer your assessment.
Christopher A. Banbury, PE
Nicholson Engineering Associates, Inc.
7468 Horse Lake RD
Brooksville, FL 34601
(352) 799-0170 (o) (352) 754-9167 (f)