IEVref: 113-03-29 ID: Language: en Status: Standard Term: second axial moment of area Synonym1: Synonym2: Synonym3: Symbol: Ia Definition: for a plane surface S and a specified axis in the plane of the surface, additive scalar quantity equal to the integral ${I}_{\text{a}}={\int }_{\text{S}}{R}^{2}\mathrm{d}A$, where R is the distance between a surface element with area dA and the axisNOTE 1 The second axial moment of area is sometimes given the wrong name "moment of inertia" but should not to be confused with the quantity "moment of inertia". NOTE 2 The coherent SI unit of second axial moment of area is metre to the power four, m4. Publication date: 2011-04 Source: Replaces: Internal notes: 2017-06-02: Cleanup - Remove Attached Image 113-03-29en.gif CO remarks: TC/SC remarks: VT remarks: Domain1: Domain2: Domain3: Domain4: Domain5: