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Help me with Floating Column
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vinay_gowda
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Joined: 25 Jul 2019
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Location: Bengaluru, India

PostPosted: Sun Jul 12, 2020 10:06 am    Post subject: Help me with Floating Column Reply with quote

Hello SEFIans,
Iam Vinay Gowda, fresher in Structural Engineering Job. I have come accross a problem as shown in the figure attached below. I am designing the G+4 RCC Structure building having typical plan in all 4 floors, my Architect is asking me to remove Column-C5 in Ground floor ( Parking Area)  to increase aesthetic appearance of building. I need to retain the column in next floors. Iam thinking of providing floating column with transfer beam. Please correct if I am going wrong and help me to solve the issue.
Regards,
Vinay Gowda



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veeran08
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PostPosted: Tue Jul 14, 2020 10:23 am    Post subject: Floating column option Reply with quote

Dear Eng. Vinay

How transfer beam will get connected to columns since C1, C5 and C9 are not aligned ?

Regards
Veera
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vinay_gowda
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Joined: 25 Jul 2019
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Location: Bengaluru, India

PostPosted: Tue Jul 14, 2020 11:18 am    Post subject: Reply with quote

Hello Veera,
I thought of providing one more column right to C9 and provide Transfer beam. Is it safe to provide Transfer beam since it should withstand another 4 floors between that span?
Regards
Vinay
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es_jayakumar
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Joined: 24 Nov 2011
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Location: Cochin

PostPosted: Wed Jul 15, 2020 2:31 am    Post subject: Reply with quote

Architects should not dictate terms in respect of structural aspects. What will you do if he / she demands removal of  all the 3 columns C5,C6 & C7, in order to facilitate easiness in vehicle parking ? You try to convince the Architect, of the structural importance of column C5.

E S Jayakumar
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vinay_gowda
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Joined: 25 Jul 2019
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Location: Bengaluru, India

PostPosted: Wed Jul 15, 2020 3:14 am    Post subject: Reply with quote

Hello Jayakumar sir,
Yes I agree with your opinion. Even I  tried lot to convince them. Initially they were recommending me to adopt 6" wall to flush with wall insted 8", but is code recommend 8" and I convinced them.

My point is, these local contractors and builders play with human life and practice the construction as per as clint request without knowing prominence of structural part of building.

Sad to say, now my project is in hold and clint told that they can get  structural work from other.

Hoping for better days.
Regards,
Vinay
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VPandya
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PostPosted: Wed Jul 15, 2020 4:17 am    Post subject: Show them ASCE book on " FAILURE CASE STUDIES IN CIVIL ENGINEERING ," Reply with quote

Er. Vinay,
ASCE ( American Society Of Civil Engineers ) has published a book " FAILURE  CASE STUDIES IN CIVIL ENGINEEEING " 2nd Ed,  Chapter 5 has Building Failure case studies . Many Building structure failures are studied . Go to ASCE web site down load a copy and show it your Architect friends  .
After showing them this book resign and walk out of your job. We structural Engineers  work only for PUBLIC SAFETY and in that no compromise .

Regards.

Vasudeo Pandya P.E.
Structural Engineer
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vinay_gowda
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Joined: 25 Jul 2019
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PostPosted: Wed Jul 15, 2020 4:28 am    Post subject: Reply with quote

Hello Pandya sir,
I will go through the book you recommend. What you said is absolutely true.

Yes I will walk-out from the company if it continued this way.

Regards,
Vinay
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Dr. N. Subramanian
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PostPosted: Wed Jul 15, 2020 6:41 pm    Post subject: Re: Show them ASCE book on " FAILURE CASE STUDIES IN CIVIL ENGINEERING ," Reply with quote

Thank you Pandyaji for the info. Can we simply download that book. ASCE books are priced and normally not available elsewhere also.

Floating columns are also banned as per the latest version of IS 1893-Part 1, I think.

I remember the discussions I had with the famous architect Ar. Hafeez Contractor in Mumbai, several years ago, who asked me to provide floating columns in a hotel building. I refused and came out of the project. For me building safety is important than the megre fee given by the architects.

Warm regards
Subramanian



VPandya wrote:
Er. Vinay,
ASCE ( American Society Of Civil Engineers ) has published a book " FAILURE  CASE STUDIES IN CIVIL ENGINEEEING " 2nd Ed,  Chapter 5 has Building Failure case studies . Many Building structure failures are studied . Go to ASCE web site down load a copy and show it your Architect friends  .
After showing them this book resign and walk out of your job. We structural Engineers  work only for PUBLIC SAFETY and in that no compromise .

Regards.

Vasudeo Pandya P.E.
Structural Engineer
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VPandya
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Posts: 791
Location: Ahmedabad

PostPosted: Wed Jul 15, 2020 9:09 pm    Post subject: A .pdf copy of ASCE Failure Case Studies is attached Reply with quote

Dear  Dr. Subramanian,
Thanks.  Certainly .
I am attaching a . pdf  copy of  " FAILURE  CASE STUDIES IN CIVIL ENGINEEEING " 2nd Ed, "  
I hope it is O.K. to break ASCE rule to use this publication for personal use . SEFI is used also for mentoring/educating  young Structural Engineers .  

Regards.

Vasudeo Pandya  P.E.  
Structural Engineer



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veeran08
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Joined: 02 May 2012
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PostPosted: Thu Jul 16, 2020 6:33 am    Post subject: Floating column Reply with quote

vinay_gowda wrote:
Hello Veera,
I thought of providing one more column right to C9 and provide Transfer beam. Is it safe to provide Transfer beam since it should withstand another 4 floors between that span?
Regards
Vinay



Dear Vinay

As our seniors suggested, this is not an option to go far.

Though in industrial structures,  bigger spans like 6m to 7m are common with bigger sized columns, but in residential structures, they are not  adopted due to limitations on sizes of columns in the architectural layouts imposed by these Architects.

To be specific, only 6 inches width columns for such a staircase with such span for four floors are not preferred given the fact that staircases are only used by residents during earthquake or fire accident etc for emergency exit.  If this is insisted by Architect, we need to explain properly and some projections of bigger size columns at the corner of walls within a staircase should not be objectionable.

Regards
Veera
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