# Re: Crack widths in Slabs on Grade

• To: seaint(--nospam--at)seaint.org
• Subject: Re: Crack widths in Slabs on Grade
• From: "syed faiz ahmad" <syedfaiz23(--nospam--at)hotmail.com>
• Date: Tue, 05 Feb 2002 23:38:03 +0300
```Himat,

This formula reminds me of the formula we normally use to measure the
elongation of prestressed strands/cables in pretensioning/post tensioning
works. Where:

P= prestressing pull
L= length of the cable/strand
A= cross sectional area of the cable/strand
E= modulus of elasticity of the cable/strand

Interesting, isn't it? Any comment on this from our learned friends?

Regards,

SENIOR STRUCTURAL ENGINEER
SAUDI OGER LTD

```
```From: "Himat Solanki" <HSolanki(--nospam--at)co.sarasota.fl.us>
To: <seaint(--nospam--at)seaint.org>
Subject: Crack widths in Slabs on Grade
Date: Tue, 05 Feb 2002 13:44:07 -0500

Hi

The slab develops  cracks due to the  temperature and shrinkage. The
following formula could be used. Try

crack width = Pl /AE

P = Steel Force
A = concrete Cross sectional Area(12xt)
E=Creep modulus of Concrete
l = spacing of transverse Contraction joints

regards,
Himat Solanki

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SENIOR STRUCTURAL ENGINEER
SAUDI OGER LTD

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