Based on API 650 calculations from various fabricators, It would seem that the weight of the floor plates are not considered when calculating overturning moments (API 650, sect. 5.11) and Uplift loads (API 650 sect. 5.12). This is also the case for calculations performed in TANK (a program for API 650 tanks from the makers of PV Elite). Section 5.11 verbiage clearly does not require the inclusion of the weight of the floor plates, but section 5.12 is a little more vague, as the phrase "any dead load” could potentially be interpreted as including the floor plates. I don’t have near the experience of the for-mentioned sources, but it seems logical that the weight of the floor plates should be included in both cases.
That being said...
Is not including the weight of the floor plates the correct procedure?
If so, what would be the potential reasoning for excluding it?
A little guidance is needed.
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