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RE: Stirrups in Footings

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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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