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Ashishpvnit on Relocation of Intermediate Wind Girder IWG & its Section Modulous Calculation

By: ashishpvnit [634] 4 Stars
Date: Tuesday, January 11, 2011
Time: 1:35:06 AM

Dear Experts,

Would like to have your suggestion for above mentioned Subject:-

Tank Details:-
Dia x Ht 77.87m x 25.4m
Roof Type Internal Floating Roof Outer Column Supported Fixed Cone roof
Corossion Allowance 1.6 mm
Provided Shell Details
Course No Thk mm Width m Material
1 39 2.38 A537 CL-2
2 36.5 2.38 A537 CL-2
3 35.5 2.38 A573 Gr.70
4 29.5 2.38 A573 Gr.70
5 25.5 2.38 A573 Gr.70
6 21 2.38 A573 Gr.70
7 17 2.38 A573 Gr.70
8 13 2.38 A573 Gr.70
9 12 2.38 A36
10 11 2.38 A36
11 10 2.38 A36

Transformed width with corroded contion 10-1.6 8.4mm 7.21m
Maximum Height of Unstiffened Shell with corroded contion 4.52m

Querry:-
1 Instead of putting one IWG at 7.21 / 2 3.605m from Top of Cub angle TCA.Can i put it at 3m from TCA ?
2 If Yes so for calculation of Reqd.Section Modulus D2 x Hi x Zc /17 .What value of Hi i should take? As distance above & below for IWG will be 3m & 7.21-3 4.21m respectively?


Regards
Ashishpvnit


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