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A B Malla General Sponsor
Joined: 26 Mar 2017 Posts: 13
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Posted: Mon Sep 16, 2019 8:56 amPost subject: shear stress in bolts |
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Dear Sefians,
I would like to know the difference in Permissible Stresses of Bolts considered inTable 8.1 of IS:800-1984&Table 1 of IS 802 ( Part l/Set 2 ) : 1992,since both these tables show different values. kindly share your expertise.
PFA Tables for reference.
Regards, A. B Malla |
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Dr. N. Subramanian General Sponsor
Joined: 21 Feb 2008 Posts: 5524 Location: Gaithersburg, MD, U.S.A.
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Posted: Tue Sep 17, 2019 3:56 amPost subject: Re: shear stress in bolts |
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Dear ErMalla
IS 800:1984 is in Working stress format(we have to now use IS 800:2007 only) and IS 802 table shows ultimate stress. Hence the difference. It is better now to use the values given in IS 800:2007
Best wishes NS
Abrar wrote: |
Dear Sefians,
I would like to know the difference in Permissible Stresses of Bolts considered inTable 8.1 of IS:800-1984&Table 1 of IS 802 ( Part l/Set 2 ) : 1992,since both these tables show different values. kindly share your expertise.
PFA Tables for reference.
Regards, A. B Malla |
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|
Back to top |
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A B Malla General Sponsor
Joined: 26 Mar 2017 Posts: 13
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Posted: Tue Sep 17, 2019 4:47 amPost subject: |
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Dear sir,
it is as per contract requirement to use IS 800 :1984, since the project is old & is still going.
1. IS 802:1992, it is observed permissible shear stress in 4.6 grade bolts is 218 Mpa, while for same grade of bolt permissible stress is 80 Mpa in IS 800:1984.
2. I presume both IS 800 & 802 are working stress please clarify.
3. while designing bolts for tower, which stress is to be considered. (In Transmission line structures by S.S Muthy & A.R Santhakumar, IS:800:1984 table is mentioned).
i'm delighted to see the reply is coming from author of the book, which i was referring to in my UG & PG. Thanks to SEFI.
Regards A.B Malla |
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Dr. N. Subramanian General Sponsor
Joined: 21 Feb 2008 Posts: 5524 Location: Gaithersburg, MD, U.S.A.
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发布:Se结婚p 18, 2019 6:52 pmPost subject: |
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DearEr Malla,
Please note that while IS 800:1984 is based on working stress method, IS 802: 1995 is based on极限载荷的概念——看到封面的802(1 /秒1部分):1995. Hence there should not be any confusion, though it is not stated clearly in IS 802(Part 1/Sec 2) of the code.
Perhaps this code (IS 802) will also be revised based on IS 800:2007 soon.
Good to know that you referred my book in UG and PG. All the best.
Regards, NS
A B Malla wrote: |
Dear sir,
it is as per contract requirement to use IS 800 :1984, since the project is old & is still going.
1. IS 802:1992, it is observed permissible shear stress in 4.6 grade bolts is 218 Mpa, while for same grade of bolt permissible stress is 80 Mpa in IS 800:1984.
2. I presume both IS 800 & 802 are working stress please clarify.
3. while designing bolts for tower, which stress is to be considered. (In Transmission line structures by S.S Muthy & A.R Santhakumar, IS:800:1984 table is mentioned).
i'm delighted to see the reply is coming from author of the book, which i was referring to in my UG & PG. Thanks to SEFI.
Regards A.B Malla |
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A B Malla General Sponsor
Joined: 26 Mar 2017 Posts: 13
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Posted: Sat Sep 21, 2019 4:21 amPost subject: shear stress in bolts |
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Dear N S Sir,
Thank you very much for your valuable time from your busy schedule. Such efforts from your side benefits all of us.
Regards, A B Malla |
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