www.sefindia.org

STRUCTURAL ENGINEERING FORUM OF INDIA [SEFI]

 Forum SubscriptionsSubscriptions DigestDigest Preferences   FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups  RegisterRegister FAQSecurity Tips FAQDonate
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log in to websiteLog in to websiteLog in to websiteLog in to forum 
Warning: Make sure you scan the downloaded attachment with updated antivirus tools  before opening them. They may contain viruses.
Use online scanners
here and here to upload downloaded attachment to check for safety.

VERTICAL EXTENSION OF OLD BUILDING.
Goto page 1, 2  Next
 
Post new topicReply to topic Thank Post    www.sefindia.org Forum Index -> SEFI General Discussion
View previous topic :: View next topic  
Author Message
P.K.Mallick
General Sponsor
General Sponsor


Joined: 14 Dec 2008
Posts: 1098
Location: Kanpur. p.k.mallick1962@gmail.com

PostPosted: Mon Feb 09, 2009 2:32 am    Post subject: VERTICAL EXTENSION OF OLD BUILDING. Reply with quote

The building is G+3(Ground +3 upper floors). It was constructed sometimes in early Eighty. Structural Drawings are not available. There were dowels left in columns for vertical extension. Dowels left for vertical extension appear to be adequate for extension of one more floor. Since structural drawings are not available, theoretically it cannot be determined whether foundations have been designed for G+3 (Ground +3 upper floors) or G+4(Ground +4 upper floors).
Is there any way out? How to determine whether vertical extension is possible or not?

_________________
P.K.Mallick
p.k.mallick1962@gmail.com
Back to top
View user's profile Send private message Visit poster's website
sakumar79
...
...


Joined: 18 Apr 2008
Posts: 692

PostPosted: Mon Feb 09, 2009 8:12 am    Post subject: Reply with quote

Perhaps footings can be exposed at a few locations (only peripheral columns will be feasible) to estimate load capacity and a rough estimate can be made to check if load with the extra floor is within limits... If this is reasonable at a few locations, it may be proceeded with an extra floor...

Otherwise, you can think of going for Truss roof with Aerocon blocks to reduce the extra load on the footings.

Arun
Back to top
View user's profile Send private message
ibarua
General Sponsor
General Sponsor


Joined: 26 Jan 2003
Posts: 1039

PostPosted: Mon Feb 09, 2009 1:09 pm    Post subject: VERTICAL EXTENSION OF OLD BUILDING. Reply with quote

9th Feb 2009

Re.: Vertical extension of old building

No way to determine soundness of design and construction without proper records, except to go in for expensive and time consuming non-destructive testing.

Best to leave such old "unengineered" (without any drawings and /or records of construction)structures alone.

Indrajit Barua.

On Mon, 09 Feb 2009 P.K.Mallick wrote :
Quote:
The building is G+3(Ground +3 upper floors). It was
constructed sometimes in early Eighty. Structural
Drawings are not available. There were dowels left in
columns for vertical extension. Dowels left for
vertical extension appear to be adequate for extension
of one more floor. Since structural drawings are not
available, theoretically it cannot be determined
whether foundations have been designed for G+3 (Ground
+3 upper floors) or G+4(Ground +4 upper floors).
Is there any way out? How to determine whether vertical
extension is possible or not?

------------------------
P.K.Mallick
munamallick@yahoo.co.in
mallick.pravatkumar@gmail.com
http://360.yahoo.com/munamallick








Posted via Email
Back to top
View user's profile Send private message
mks
...
...


Joined: 27 Dec 2008
Posts: 82
Location: Patna: email mks.b08@gmail.com

PostPosted: Mon Feb 09, 2009 1:22 pm    Post subject: Reply with quote

Dear Sir,

Les us assume after exposing the footing, if it is observed that , pile foundation is adopted. in that case what will be the solution.

Regards

Mithilesh






sakumar79 wrote:
Perhaps footings can be exposed at a few locations (only peripheral columns will be feasible) to estimate load capacity and a rough estimate can be made to check if load with the extra floor is within limits... If this is reasonable at a few locations, it may be proceeded with an extra floor...

Otherwise, you can think of going for Truss roof with Aerocon blocks to reduce the extra load on the footings.

Arun
Back to top
View user's profile Send private message
chandra
SEFI Member
SEFI Member


Joined: 26 Jan 2003
Posts: 8

PostPosted: Mon Feb 09, 2009 6:39 pm    Post subject: VERTICAL EXTENSION OF OLD BUILDING. Reply with quote

A thoughtful and proper assessment I think is the first step. Not forgetting that the building’s almost 30 years old i.e. it’s through its half life. Costlier and detailed assessment will give closer results. Please assume greater responsibility if this is a hospital or a school building, or some very important facility.
Regards,
Chandra  


From: ibarua [mailto:forum@sefindia.org]
Sent: 09 February 2009 18:49
To: general@sefindia.org
Subject: [SEFI] Re: VERTICAL EXTENSION OF OLD BUILDING.


9th Feb 2009

Re.: Vertical extension of old building

No way to determine soundness of design and construction without proper records, except to go in for expensive and time consuming non-destructive testing.

Best to leave such old "unengineered" (without any drawings and /or records of construction)structures alone.

Indrajit Barua.

On Mon, 09 Feb 2009 P.K.Mallick wrote :    
--auto removed--

Posted via Email
Back to top
View user's profile Send private message
sakumar79
...
...


Joined: 18 Apr 2008
Posts: 692

PostPosted: Tue Feb 10, 2009 1:37 am    Post subject: Reply with quote

As I mentioned, if it is not feasible to verify foundation capacity you can go for aerocon blocks with truss roof... This will not overload the structure too much even if it has been designed for G+3 only.

Arun
Back to top
View user's profile Send private message
P.K.Mallick
General Sponsor
General Sponsor


Joined: 14 Dec 2008
Posts: 1098
Location: Kanpur. p.k.mallick1962@gmail.com

PostPosted: Tue Feb 10, 2009 2:42 am    Post subject: Reply with quote

My question is "whether there is any scientific way to assess the load carrying capacity of foundations of an old building". Any methodology explained in any of the publications? Whether somebody has carried out this type of work? If yes,then how it has been assessed?
_________________
P.K.Mallick
p.k.mallick1962@gmail.com


Last edited by P.K.Mallick on Tue Feb 10, 2009 5:47 am; edited 1 time in total
Back to top
View user's profile Send private message Visit poster's website
pravin.pai
General Sponsor
General Sponsor


Joined: 25 Aug 2008
Posts: 71
Location: Mumbai

PostPosted: Tue Feb 10, 2009 4:21 am    Post subject: VERTICAL EXTENSION OF OLD BUILDING. Reply with quote

Dear Mr Mallick:

As a good CE, it is not advisable to go in for extra loading, 'blind-folded'. Remember a Bandra (East) building collapse some years ago wherein a Str.Engr. of reputed stature had added 3 more floors to a building also previously designed by him.
Moreover, if this project of yours is in Mumbai, remember underground drainage leakages deteriorates the foundations more than the super structure.
So without earlier str.dwgs. do not risk additional load
regards
pravin pai


On 2/9/09, P.K.Mallick <forum@sefindia.org (forum@sefindia.org)> wrote:
Quote:
  The building is G+3(Ground +3 upper floors). It was constructed sometimes in early Eighty. Structural Drawings are not available. There were dowels left in columns for vertical extension. Dowels left for vertical extension appear to be adequate for extension of one more floor. Since structural drawings are not available, theoretically it cannot be determined whether foundations have been designed for G+3 (Ground +3 upper floors) or G+4(Ground +4 upper floors).
Is there any way out? How to determine whether vertical extension is possible or not?



P.K.Mallick
munamallick@yahoo.co.in (munamallick@yahoo.co.in)
mallick.pravatkumar@gmail.com (mallick.pravatkumar@gmail.com)
http://360.yahoo.com/munamallick







Posted via Email
Back to top
View user's profile Send private message Visit poster's website
vikram.jeet
General Sponsor
General Sponsor


Joined: 26 Jan 2003
Posts: 2212

PostPosted: Tue Feb 10, 2009 4:38 am    Post subject: VERTICAL EXTENSION OF OLD BUILDING. Reply with quote

CBRI Roorkee may be checked up for undertaking such studies  
on old buildings and their foundations


vikramjeet

Posted via Email
Back to top
View user's profile Send private message
sdec.in
Silver Sponsor
Silver Sponsor


Joined: 26 Jan 2003
Posts: 473

PostPosted: Tue Feb 10, 2009 6:25 am    Post subject: VERTICAL EXTENSION OF OLD BUILDING. Reply with quote

with Pile foundations, it's going to be very tricky,as it maybe difficult to examine the no and spacing and exact arrangement of piles. it's length below cut-off lvl, grade of concrete used and r/f provided in piles.
Let's hope it's isolated footings, otherwise the ptoblem at hand will become more complex and almost unmanageable(will need elaborate investigations by a Professional agencyand in fact the cost thus incurred maybe very steep).
Regards
Sangeeta Wij

Quote:
----- Original Message -----
From: mks (forum@sefindia.org)
To: general@sefindia.org (general@sefindia.org)
Sent: 09 February, 2009 6:52 PM
Subject: [SEFI] Re: VERTICAL EXTENSION OF OLD BUILDING.


Dear Sir,

Les us assume after exposing the footing, if it is observed that , pile foundation is adopted. in that case what will be the solution.

Regards

Mithilesh






sakumar79 wrote:  Perhaps footings can be exposed at a few locations (only peripheral columns will be feasible) to estimate load capacity and a rough estimate can be made to check if load with the extra floor is within limits... If this is reasonable at a few locations, it may be proceeded with an extra floor...

Otherwise, you can think of going for Truss roof with Aerocon blocks to reduce the extra load on the footings.

Arun






Posted via Email
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topicReply to topic Thank Post    www.sefindia.org Forum Index -> SEFI General Discussion All times are GMT
Goto page 1, 2  Next
Page 1 of 2

 

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum


© 2003, 2008 SEFINDIA, Indian Domain Registration
Publishing or acceptance of an advertisement is neither a guarantee nor endorsement of the advertiser's product or service. advertisement policy