TL Value in API 650 Add. 4 App. E
TL Value in API 650 Add. 4 App. E
(OP)
Can anyone tell me where to find the value for TL as specified in Appendix E of API 650 Addendum 4? Section E.4.9.1 states that unless otherwise specified it shall be taken as the mapped value in ASCE 7. I can't find it mentioned specifically anywhere in ASCE 7. Should I just use a value of 4 seconds? Any help would be much appreciated. Thanks.





RE: TL Value in API 650 Add. 4 App. E
RE: TL Value in API 650 Add. 4 App. E
RE: TL Value in API 650 Add. 4 App. E
RE: TL Value in API 650 Add. 4 App. E
It looks like Eq. E-12 is just a generic how-the-approach-works equation that is not actually used for anything. You actually calculate the impulsive and convective coefficients separately and combine via E.6.1.5, etc.
The equation in 6.2.2.1 looks right to me. At least it agrees more or less with the equivalent AWWA D100 equation. Note that it is only used for unanchored tanks, so J will never be over 1.54.
In Eq. E-18, the "-1" should be outside the brackets of the cosh, I think.
In E.6.2.2.3, second equation, it should show ten to the sixth power, not 106.
Seems like there are some other inconsistencies as well.