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Calculation Procedure <br /> 1) Closed Shapes: <br /> The geometric properties for dosed shapes are computed by using the Polygon method. <br /> Ail dosed shapes are represented by closed polygons, Curvilinear and circular shapes or <br /> edges are represented by several straight tine segments.The properties of the overall <br /> Shape are computed by geometric summation of the properties of a trapezoid defined by <br /> projection of two consecutive points of the cross-section on to the x and y axis. <br /> 2) Open Shapes: <br /> The geometric properties for open(thin walled)shapes are computed by using the Polyline <br /> method. All open shapes are represented by polylines. Curvilinear and circular shapes or <br /> edges are represented by several straight line segments.The properties of the overall <br /> shape are computed by geometric summation of the properties of a line defined by <br /> projection of two consecutive points of the cross-section on to the x and y axis <br /> For details refer to the User's Manual <br /> WELCOME RAMP CALCS-IBC 2018 Page 41 <br />