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  1. D_YU

    API 650 - overturning stability of foundation

    I am updating a spreadsheet for API 650 tank foundation design. I've posted a couple questions and thanks to those who have provided your answers. Here comes the 3rd question. With regard to foundation stability (E.6.2.3), API 650 requires to check the stability under slab moment against the...
  2. D_YU

    Fa and Fv factors in API 650

    Table E.1 and E.2 in API 650 V13 define Fa and Fv factors as functions of site class A thru F. The values do not align with those in ASCE 7. Anyone knows why API doesn't use the same Fa and Fv as in ASCE 7?
  3. D_YU

    API 650 Tank Anchorage Ratio

    Hi, This is with regard to the anchorage ratio J (Table E6) in API 650 V13. My understanding is J = 0.785 (Pi/4)corresponds to eccentricity of D/4, while J = 1.54 (close to Pi/2 = 1.57) corresponds to eccentricity of D/2 but with a small (0.03/1.54 = 2%) difference. What is the significance of...

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