Appendix C Moments of Composite Areas

C.1. Centroid

This appendix is concerned with the geometric properties of cross sections of a member. These plane area characteristics have special significance in various relationships governing stress and deflection of beams, columns, and shafts. Geometric properties for most areas encountered in practice are listed in numerous reference works [Ref. C.1]. Table C.1 presents several typical cases.

Table C.1

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The first step in evaluating the characteristics of a plane area is to locate the centroid of the area. The centroid is the point in the plane about which the area is equally distributed. For area ...

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