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RE: Stirrups in Footings

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I wonder if the engineer interpreted the 18"X6" footing as a concrete beam. In that case the "beam" would attract the minimum reinforcement provisions of any code. I believe any concrete beam should have a minimum amount of stirrup reinforcement.

Rajendran

Roger Davis <rdavis(--nospam--at)sdsarch.com> wrote:
If you have 3" of bottom cover and 1" top cover on the bars in a 6" deep
footing, why bother to bend the bars. Anyway, you can't develop the bars
for shear in that short of a vertical dimension anyway. I wonder if the
1/4" bars are meant to be horizontal, transverse bars. With a 6" total
depth of footing, you probably do want some transverse bars.

Roger C. Davis
Architect


205 N. Dewey St.
Eau Claire, WI 54703
P (715) 832-1605
F (715) 832-7850


-----Original Message-----
From: Gary Hodgson & Associates [mailto:ghodgson(--nospam--at)bellnet.ca]
Sent: Thursday, January 05, 2006 7:56 AM
To: seaint(--nospam--at)seaint.org
Subject: Stirrups in Footings

List,

Yesterday, I got a call from a contractor customer who is going to
Guatemala to help supervise school construction for a non-
denominational church group.

He was supplied drawings of a 1 storey masonry structure that called
for a footing 18" x 6" with 3-10M (#3) longitudinal bars and 1/4"
wire stirrups at 6" centres.

He questioned the 6" spacing, considering it overkill. Can anybody
advise me what code(s) are applicable in Guatemala? Does this
spacing sound reasonable? Here, in non-seismic Southern-Ontario, we
would neither put stirrups nor transverse bars in our footings.

Any comments would be appreciated.

Gary

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