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RE: Drilled pier foundation

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ACI 318 and UBC Chapter 19  pertain to structural concrete.  ACI 318 Section 1.1.5 specifies that ACI 318 does not govern design and installation of portions of concrete piles and drilled piers embedded in ground.  The commentary on Section 1.1.5 references a report by ACI Committee 543, "Recommendations for Design, Manufacture and Installation of Concrete Piles".


>>> paulc(--nospam--at)ckcps.com 03/06/01 03:36PM >>>
Yes, there is a chance of that happening.  Futhermore, if you are in an area
governed by the UBC or ACI 318 setting of reinforcement after the concrete
is placed is forbidden by code (UBC 1907.5.1).  

Paul Crocker, P.E.

-----Original Message-----
From: Padmanabhan Rajendran [mailto:rakamaka(--nospam--at)yahoo.com] 
Sent: Tuesday, March 06, 2001 12:42 PM
To: seaint(--nospam--at)seaint.org 
Subject: Drilled pier foundation


Drilled pier foundations have reinforcement (vertical
bars + ties or spirals) in the upper few feet of the
piers. Recently, I heard that it is common for the
construction folks to place the pier concrete and then
push a preassembled cage of reinforcement through the
concrete. Does this method guarantee that the rebar
can be placed reasonably close to the way it is
detailed on the drawing? Is'nt there a good chance
that the rebar may be bent and mangled?

Rajendran

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