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.

Corner Column Footings

 
Post new topicReply to topic Thank Post    www.sefindia.org Forum Index -> SEFI General Discussion
View previous topic :: View next topic  
Author Message
Ashik L Keremane
SEFI Member
SEFI Member


Joined: 07 Apr 2020
Posts: 6

PostPosted: Tue Aug 04, 2020 3:49 pm    Post subject: Corner Column Footings Reply with quote

Hello everyone.

Can anyone please guide me on designing the footings for corner columns, I have attached an image showing the column locations. The red line indicates Property line. All the columns are eccentric except the four columns around lift room. The rear columns carry a load of 870 kN , middle eccentric columns carry a load of 700kN and front columns carry a load of 582 kN.

Is it possible to design the exclusive eccentric footings for individual columns or is there any other method. Please share some information



COLUMN.png
 Description:
 Filesize:  25.85 KB
 Viewed:  47 Time(s)

COLUMN.png


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


Joined: 23 Nov 2012
Posts: 14

PostPosted: Wed Aug 05, 2020 5:45 am    Post subject: Reply with quote

it is possible to design eccentric footing but care should be taken about contact area of footing with base and redistribution of pressure.
Altenativly you can design strip footing connecting oppsite columns. this will give more stable foundation.
Back to top
View user's profile Send private message
Ashik L Keremane
SEFI Member
SEFI Member


Joined: 07 Apr 2020
Posts: 6

PostPosted: Wed Aug 05, 2020 5:59 am    Post subject: Reply with quote

satishkemkar wrote:
it is possible to design eccentric footing but care should be taken about contact area of footing with base and redistribution of pressure.
Altenativly you can design strip footing connecting oppsite columns. this will give more stable foundation.


Can you recommend any books or literature regarding corner eccentric footing and strip footing? or if you have any design done previously , can you please share?
Back to top
View user's profile Send private message
AAKASH_GUPTA
SEFI Member
SEFI Member


Joined: 15 Jul 2020
Posts: 2

PostPosted: Wed Aug 05, 2020 11:03 am    Post subject: Reply with quote

Dear SEFI members,

I have same issue as posted by Mr. Ashik. I have proposed isolated footing for the corner columns and as it being eccentric i am not sure about stability of footing. can anyone guide me what can i do ensure the stability and proper transfer of pressure.

Thanks & Regards
Back to top
View user's profile Send private message
naga
...
...


Joined: 15 Sep 2011
Posts: 52

PostPosted: Thu Aug 06, 2020 5:20 am    Post subject: Re: Corner Column Footings Reply with quote

mr.ashik,
it's better to have some more columns.one in between 20' span horizontal  both the ends.
one more between 19'span vertically.
these columns doesn't effect in your plan.and load on each column also reduced to half.
design isolate footings with strap beam connecting all columns at foundation level.
number of floors--?
naga

Ashik L Keremane wrote:
Hello everyone.
Can anyone please guide me on designing the footings for corner columns, I have attached an image showing the column locations. The red line indicates Property line. All the columns are eccentric except the four columns around lift room. The rear columns carry a load of 870 kN , middle eccentric columns carry a load of 700kN and front columns carry a load of 582 kN.

Is it possible to design the exclusive eccentric footings for individual columns or is there any other method. Please share some information
Back to top
View user's profile Send private message
N. Prabhakar
General Sponsor
General Sponsor


Joined: 25 Apr 2009
Posts: 474

PostPosted: Thu Aug 06, 2020 5:27 am    Post subject: Reply with quote

Dear Sefians,

For design of corner column footing with eccentric load, the best solution for stability consideration is to tie the corner footing to an adjacent column footing with a beam. The example of this type of footing is given in many standard books on RC design like, Dr. Subramaniian's book and Reynolds Handbook.

I trust you will ind the above information useful.

With best wishes,

N. Prabhakar
Chartered Structural Engineer
Vasai (E), Pin 401 20
Back to top
View user's profile Send private message
Ashik L Keremane
SEFI Member
SEFI Member


Joined: 07 Apr 2020
Posts: 6

PostPosted: Thu Aug 06, 2020 5:35 am    Post subject: Re: Corner Column Footings Reply with quote

naga wrote:
mr.ashik,
it's better to have some more columns.one in between 20' span horizontal  both the ends.
one more between 19'span vertically.
these columns doesn't effect in your plan.and load on each column also reduced to half.
design isolate footings with strap beam connecting all columns at foundation level.
number of floors--?
naga

Ashik L Keremane wrote:
Hello everyone.
Can anyone please guide me on designing the footings for corner columns, I have attached an image showing the column locations. The red line indicates Property line. All the columns are eccentric except the four columns around lift room. The rear columns carry a load of 870 kN , middle eccentric columns carry a load of 700kN and front columns carry a load of 582 kN.

Is it possible to design the exclusive eccentric footings for individual columns or is there any other method. Please share some information


Thanks for your suggestion, I can provide a column between 19' span, but providing column between 20' will not be possible at the rear end ,because there is a open well, 3 ft beside the property line at the rear center.

And the building is Ground + 3 Storeys commercial building
Back to top
View user's profile Send private message
Ashik L Keremane
SEFI Member
SEFI Member


Joined: 07 Apr 2020
Posts: 6

PostPosted: Thu Aug 06, 2020 5:37 am    Post subject: Reply with quote

N. Prabhakar wrote:
Dear Sefians,

For design of corner column footing with eccentric load, the best solution for stability consideration is to tie the corner footing to an adjacent column footing with a beam. The example of this type of footing is given in many standard books on RC design like, Dr. Subramaniian's book and Reynolds Handbook.

I trust you will ind the above information useful.

With best wishes,

N. Prabhakar
Chartered Structural Engineer
Vasai (E), Pin 401 20


Thanks for your valuable advice Sir, I will definitely check the suggested books.
Back to top
View user's profile Send private message
es_jayakumar
General Sponsor
General Sponsor


Joined: 24 Nov 2011
Posts: 1367
Location: Cochin

PostPosted: Sun Aug 09, 2020 4:01 pm    Post subject: Reply with quote

N. Prabhakar wrote:
Dear Sefians,

For design of corner column footing with eccentric load, the best solution for stability consideration is to tie the corner footing to an adjacent column footing with a beam. The example of this type of footing is given in many standard books on RC design like, Dr. Subramaniian's book and Reynolds Handbook.

I trust you will ind the above information useful.

With best wishes,

N. Prabhakar
Chartered Structural Engineer
Vasai (E), Pin 401 20


For edge columns,  strap / cantilever footings, as suggested by Prabhakar sir, or combined footings, are fine. But, for corner columns, which can develop tension on soil on the two adjacent inner edges of its isolated footing, raft foundation is appropriate. I don't know the efficacy of providing strap footings in the two orthogonal directions from a corner column.

E S Jayakumar
Back to top
View user's profile Send private message
B.V.Harsoda
General Sponsor
General Sponsor


Joined: 19 Jan 2009
Posts: 2320
Location: RAJKOT,GUJARAT, INDIA

PostPosted: Mon Aug 31, 2020 1:13 pm    Post subject: Reply with quote

Last Post by N. Prabhaker Sir for us.



N. Prabhakar wrote:
Dear Sefians,

For design of corner column footing with eccentric load, the best solution for stability consideration is to tie the corner footing to an adjacent column footing with a beam. The example of this type of footing is given in many standard books on RC design like, Dr. Subramaniian's book and Reynolds Handbook.

I trust you will ind the above information useful.

With best wishes,

N. Prabhakar
Chartered Structural Engineer
Vasai (E), Pin 401 20
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
Page 1 of 1

 

 
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