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# RE: Minimum Temperature Reinforcement

• To: seaint(--nospam--at)seaint.org
• Subject: RE: Minimum Temperature Reinforcement
• From: Walter Sheen Paoli <wsp(--nospam--at)dhl.com.pe>
• Date: Fri, 03 Sep 1999 14:04:00 -0500

```Thanks for your answer, but when I asked how to determine the amount of
steel I was not asking for CODE minimums, I was asking for something beyond
the code. I meant, how do the people who made the code got those values.
Since we also use ACI, and it was made in USA for USA weather, we wanted to
know if we could use less for a milder weather like ours.

At 01:14 PM 03/09/1999 -0400, you wrote:
>1.) Minimum wall steel determined by ACI-318 for WWF:
>Vertical Reinforcement Steel Area = 0.0012 x Gross Area of concrete
>Horizontal Reinforcement Steel Area = 0.0020 x Gross Area of Concrete
>Minimum Steel Area for Temp/Shrinkage = 0.0015 x Gross Area of Concrete if
>WWF fy=70 ksi
>2.) Yes because these are the absolute code minimums.
>3.) Yes & no ... depends on the wire diameter and the formulas in 1.) above.
>
>William J. Keil, P.E.
>
>-----Original Message-----
>From: Walter Sheen Paoli [mailto:wsp(--nospam--at)dhl.com.pe]
>Sent: Friday, September 03, 1999 12:27 PM
>To: seaint(--nospam--at)seaint.org
>Subject: Minimum Temperature Reinforcement
>
>
>Dear Fellows:
>
>We have been working developing a small house for poor people. This one is
>made out of four inch reinforced concrete walls. We have been able to prove
>that a 1400 psi concrete is enough for the expected lateral forces and also
>for dead and live load. We have used the minimum specified steel
>reinforcement for temperature and tested a natural scale module in a
>laboratory. We have found that it resists 8 times the expected lateral
>force. Now since we made the cement contents as low as we could, now we
>want (if possible) to put less steel reinforcement. Now I'd like to ask:
>
>1.- Temperatures between summer and winter have a 25 Celsius degrees, which
>is not a lot. How is this minimum steel reinforcement determined ?
>2.- In your opinion, for cracking control, would it be bad to use less
>steel?
>3.- We are planning to use welded wire reinforcement. If we specify small
>distance between wires, would it be possible to use less amount of steel ?
>
>
>
>
>
>Walter E. Sheen
>Civil Engineer
>Paseo de la Republica 6403. Lima 04
>(511) 446-6237 (511) 446-9407
>Lima, Peru
>----------------------------------
>mailto:wsp(--nospam--at)dhl.com.pe
>----------------------------------
>
>
>

Walter E. Sheen
Civil Engineer
Paseo de la Republica 6403. Lima 04
(511) 446-6237 (511) 446-9407
Lima, Peru
----------------------------------
mailto:wsp(--nospam--at)dhl.com.pe
----------------------------------

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