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deepak12 SEFI Member
Joined: 09 Nov 2010 Posts: 5

Posted: Mon Jan 23, 2023 10:59 am Post subject: FOR BEAM DESIGN IN EARTHQUAKE ANY MENTION T SECTION ALLOWED IN SUPPORT ,USE ONLY RECTANGULAR SECTION ANY SPECIFIC 


Dear sir/mam
As per our subject above In ISCODE 456 any where mention beam design T section is not considered support in Earthquake structure only rectangular section consider beam design .
Kindly clarification and specific reason for beam design is applicable or not TSection or Rectangular
Thanks and Regards
DT 

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Dr. N. Subramanian General Sponsor
Joined: 21 Feb 2008 Posts: 5538 Location: Gaithersburg, MD, U.S.A.

Posted: Tue Jan 24, 2023 1:38 am Post subject: Re: FOR BEAM DESIGN IN EARTHQUAKE ANY MENTION T SECTION ALLOWED IN SUPPORT ,USE ONLY RECTANGULAR SECTION ANY SPECIFIC 


deepak12 wrote:  Dear sir/mam
As per our subject above In ISCODE 456 any where mention beam design T section is not considered support in Earthquake structure only rectangular section consider beam design .
Kindly clarification and specific reason for beam design is applicable or not TSection or Rectangular
Thanks and Regards
DT 
Dear Er. Deepak
At support, the bending moment will change sign, meaning
Tension will be at top. As the top of Tsection will be under tension, it will be cracked and hence only rectangular section is considered in the design at support. Of course, at midsection, the top section will be under compression and hence it is designed as Tsection. Hence, more reinforcement may be needed at support for the same quantity of BM. This is true for live and dead loads. During earthquake loading, the loading may reverse and hence hence only rectangular section should be considered throughout.
Best wishes
NS 

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deepak12 SEFI Member
Joined: 09 Nov 2010 Posts: 5

Posted: Tue Jan 24, 2023 10:36 am Post subject: Re: FOR BEAM DESIGN IN EARTHQUAKE ANY MENTION T SECTION ALLOWED IN SUPPORT ,USE ONLY RECTANGULAR SECTION ANY SPECIFIC 


Dr. N. Subramanian wrote:  deepak12 wrote:  Dear sir/mam
As per our subject above In ISCODE 456 any where mention beam design T section is not considered support in Earthquake structure only rectangular section consider beam design .
Kindly clarification and specific reason for beam design is applicable or not TSection or Rectangular
Thanks and Regards
DT 
Dear Er. Deepak
At support, the bending moment will change sign, meaning
Tension will be at top. As the top of Tsection will be under tension, it will be cracked and hence only rectangular section is considered in the design at support. Of course, at midsection, the top section will be under compression and hence it is designed as Tsection. Hence, more reinforcement may be needed at support for the same quantity of BM. This is true for live and dead loads. During earthquake loading, the loading may reverse and hence hence only rectangular section should be considered throughout.
Best wishes
NS 
Dear sir,
In the both side the left and right side Design BEAM T Section or Rectangular section in Earthquake support condition
Thanks and Regards
DT 

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Dr. N. Subramanian General Sponsor
Joined: 21 Feb 2008 Posts: 5538 Location: Gaithersburg, MD, U.S.A.

Posted: Tue Jan 24, 2023 4:52 pm Post subject: Re: FOR BEAM DESIGN IN EARTHQUAKE ANY MENTION T SECTION ALLOWED IN SUPPORT ,USE ONLY RECTANGULAR SECTION ANY SPECIFIC 


deepak12 wrote:  Dr. N. Subramanian wrote:  deepak12 wrote:  Dear sir/mam
As per our subject above In ISCODE 456 any where mention beam design T section is not considered support in Earthquake structure only rectangular section consider beam design .
Kindly clarification and specific reason for beam design is applicable or not TSection or Rectangular
Thanks and Regards
DT 
Dear Er. Deepak
At support, the bending moment will change sign, meaning
Tension will be at top. As the top of Tsection will be under tension, it will be cracked and hence only rectangular section is considered in the design at support. Of course, at midsection, the top section will be under compression and hence it is designed as Tsection. Hence, more reinforcement may be needed at support for the same quantity of BM. This is true for live and dead loads. During earthquake loading, the loading may reverse and hence hence only rectangular section should be considered throughout.
Best wishes
NS 
Dear sir,
In the both side the left and right side Design BEAM T Section or Rectangular section in Earthquake support condition
Thanks and Regards
DT 
Dear Er.Deepak,
In Earthquake conditions, as the BM is reversible, everywhere you need to consider rectangular section only in the design.
Regards
Subramanian 

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deepak12 SEFI Member
Joined: 09 Nov 2010 Posts: 5

Posted: Wed Jan 25, 2023 10:55 am Post subject: Re: FOR BEAM DESIGN IN EARTHQUAKE ANY MENTION T SECTION ALLOWED IN SUPPORT ,USE ONLY RECTANGULAR SECTION ANY SPECIFIC 


Dr. N. Subramanian wrote:  deepak12 wrote:  Dr. N. Subramanian wrote:  deepak12 wrote:  Dear sir/mam
As per our subject above In ISCODE 456 any where mention beam design T section is not considered support in Earthquake structure only rectangular section consider beam design .
Kindly clarification and specific reason for beam design is applicable or not TSection or Rectangular
Thanks and Regards
DT 
Dear Er. Deepak
At support, the bending moment will change sign, meaning
Tension will be at top. As the top of Tsection will be under tension, it will be cracked and hence only rectangular section is considered in the design at support. Of course, at midsection, the top section will be under compression and hence it is designed as Tsection. Hence, more reinforcement may be needed at support for the same quantity of BM. This is true for live and dead loads. During earthquake loading, the loading may reverse and hence hence only rectangular section should be considered throughout.
Best wishes
NS 
Dear sir,
In the both side the left and right side Design BEAM T Section or Rectangular section in Earthquake support condition
Thanks and Regards
DT 
Dear Er.Deepak,
In Earthquake conditions, as the BM is reversible, everywhere you need to consider rectangular section only in the design.
Regards
Subramanian 
Dear sir,
In the case also applicable both side the slab left and right side Design BEAM T Section or Rectangular section in Earthquake support condition can possible only add extra steel provide for Support according to the rectangular section moments
Thanks and Regards
DT 

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