Need a book? Engineering books recommendations...

Return to index: [Subject] [Thread] [Date] [Author]

Re: LONGITUDINAL SPLIT IN HOLLOW CORE.

[Subject Prev][Subject Next][Thread Prev][Thread Next]
Dear Mr. Ahmad,
I have used this system quite a lot, but I've never faced this kind of
problem. Could you please clarify the following:
- Do the cracks go all the way thru the slab thickness?
- Do these cracks appear in all the panels or just edge panels?
- What is the width the the panels (1200mm)?
- What is the diameter of the cores(voids) compared with the total thickness
of the slab?
- What transverse reinf. mesh is provided in top and bottom of slab?
- Are they hollow core precast prestressed slabs?

Regards,
Hasan Hindawi
Amman, Jordan

----- Original Message -----
From: syed faiz ahmad <syedfaiz23(--nospam--at)hotmail.com>
To: <seaint(--nospam--at)seaint.org>
Sent: Friday, December 28, 2001 9:11 PM
Subject: LONGITUDINAL SPLIT IN HOLLOW CORE.


> Learned Friends,
>
> Attention is invited from any body experienced in design, production or
> simply use of Hollow Core Slabs to the following problem which Iam
> experiencing in one of my projects for quite sometime.
>
> PROBLEM:
>
> The Roof Hollow Core Slab splits longitudinally long after installation &
> completion of roofing work (water proofing)& ceiling paint/finishes upon
it.
> These cracks are:
>
>      - not continues, breaks after about 30-40 cm
>        (12 to 16-in.).
>
>      -  the crack widths are varying, from 0.1 to
>         0.5 mm, sometimes a little more.
>
>      -  these cracks are longitudinal & not trans-
>         verse.
>
> More information can be passed on upon request, but right now this is the
> broad description of the problem perse.
>
> Iam aware of the PCI publication about production & shipment cracks; which
> deals with these kinds of longitudinal split of the Hollow Core; but my
> problem is post-installation & hence the causes outlined in this
particular
> publication donot as such apply to this problem.
>
> I would appreciate if any one of our learned colleagues, on this LIST,
can
> throw light on the following:
>
>       - the broad reasons for these cracks.
>
>       -  are these any sign of structural distress
>         of some kind?
>
>       -  are they cause of concern?
>
>       - they appear after the ceilings are painted
>         & finished; what to do about it?; since it
>         is a cause of concern from architectural
>         aesthetics point of view, as well.
>
> Best regards & thanx in advance.
>
> SYED FAIZ AHMAD; MENGG, MASCE
> SENIOR STRUCTURAL ENGINEER
> SAUDI OGER LTD
> RIYADH, SAUDI ARABIA.
>
>
> _________________________________________________________________
> Join the world’s largest e-mail service with MSN Hotmail.
> http://www.hotmail.com
>
>
> ******* ****** ******* ******** ******* ******* ******* ***
> *   Read list FAQ at: http://www.seaint.org/list_FAQ.asp
> *
> *   This email was sent to you via Structural Engineers
> *   Association of Southern California (SEAOSC) server. To
> *   subscribe (no fee) or UnSubscribe, please go to:
> *
> *   http://www.seaint.org/sealist1.asp
> *
> *   Questions to seaint-ad(--nospam--at)seaint.org. Remember, any email you
> *   send to the list is public domain and may be re-posted
> *   without your permission. Make sure you visit our web
> *   site at: http://www.seaint.org
> ******* ****** ****** ****** ******* ****** ****** ********
>


******* ****** ******* ******** ******* ******* ******* ***
*   Read list FAQ at: http://www.seaint.org/list_FAQ.asp
* 
*   This email was sent to you via Structural Engineers 
*   Association of Southern California (SEAOSC) server. To 
*   subscribe (no fee) or UnSubscribe, please go to:
*
*   http://www.seaint.org/sealist1.asp
*
*   Questions to seaint-ad(--nospam--at)seaint.org. Remember, any email you 
*   send to the list is public domain and may be re-posted 
*   without your permission. Make sure you visit our web 
*   site at: http://www.seaint.org 
******* ****** ****** ****** ******* ****** ****** ********