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sidhudaljeet ...
Joined: 26 Jan 2003 Posts: 110
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Posted: Tue Aug 31, 2004 12:46 pm Post subject: Regarding design load for foundations |
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Please guide me what should be designed load (combination of loads) for foundation design in case RCC framed structures for earthquake resistant design. It is common practice to design the foundation for DL + 0.6 LL is it as per Indian Standards.
Thanks
Daljeet Sidhu
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sdec.in Silver Sponsor
Joined: 26 Jan 2003 Posts: 473
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Posted: Wed Sep 01, 2004 4:58 am Post subject: Regarding design load for foundations |
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Pl refer IS875 Appendix which gives an example for working out the reduced LL % based on no of storeys,the max reduction being 60 %.However u must also check for unfactored combinations with Wind and Eq(in these combos,25 % excess is permitted) and then design finally for the worst case. Sangeeta Wij
-----Original Message----- Message From sidhudaljeet@yahoo.com [mailto:sidhudaljeet@yahoo.com] Sent: Tuesday, August 31, 2004 6:24 PM To: sdec@bol.net.in Subject: Regarding design load for foundations
Please guide me what should be designed load (combination of loads) for foundation design in case RCC framed structures for earthquake resistant design. It is common practice to design the foundation for DL + 0.6 LL is it as per Indian Standards.
Thanks
Daljeet Sidhu
---------------------------------
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skjain.iitk General Sponsor
Joined: 26 Jan 2003 Posts: 104
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Posted: Thu Sep 02, 2004 6:48 am Post subject: Regarding design load for foundations |
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I think there has been a change in the IS875 Part 2 at some point. I have the 1987 version (reaffirmed 1997) and it shows that live load reduction in lower stories can go as high as 50%.
Best regards,
Sudhir Jain IIT Kanpur ---------------------------------------------------------------------------
On Wed, 1 Sep 2004 sdec@bol.net.in wrote:
Quote: | Pl refer IS875 Appendix which gives an example for working out the reduced LL % based on no of storeys,the max reduction being 60 %.However u must also check for unfactored combinations with Wind and Eq(in these combos,25 % excess is permitted) and then design finally for the worst case. Sangeeta Wij
-----Original Message----- Message From sidhudaljeet@yahoo.com [mailto:sidhudaljeet@yahoo.com] Sent: Tuesday, August 31, 2004 6:24 PM To: sdec@bol.net.in Subject: Regarding design load for foundations
Please guide me what should be designed load (combination of loads) for foundation design in case RCC framed structures for earthquake resistant design. It is common practice to design the foundation for DL + 0.6 LL is it as per Indian Standards.
Thanks
Daljeet Sidhu
---------------------------------
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