Api 650 11th Ed. Addendum 1 Anchorage Ratio calculation
Api 650 11th Ed. Addendum 1 Anchorage Ratio calculation
(OP)
In the Addendum 1 of the API 650 11th Edition there is a change in the calculation of the Anchorage Ratio J. There is a new parameter wint (calculated design uplift load due to product pressure per unit circumferential length).
Can anybody explain me what does this term means and how can I calculate it?
Can anybody explain me what does this term means and how can I calculate it?





RE: Api 650 11th Ed. Addendum 1 Anchorage Ratio calculation
J = Ms/(D2{wt*(1-0.4*Av)+wl}.
Ms is the overturning moment.
See page 147 & 148 AWWA D100-S
RE: Api 650 11th Ed. Addendum 1 Anchorage Ratio calculation
RE: Api 650 11th Ed. Addendum 1 Anchorage Ratio calculation
If the tank is an atmoshperic tank, then it would be zero.
If the tank is an Appendix F tank, then it would be internal pressure times cross-sectional area of the tank divided by circumference, all with consistent units of course. Final number in lbs/ft to match the rest of the equation.