FIGURE 6.16 Compression elements with one intermediate stiffener: (a) actual elements, (b) effective elements and stress on effective elements, and (c) stiffener section. Serviceability Determination

The effective width, bd, used in determining serviceability is calculated as in Section, except that fd is substituted for f Uniformly Compressed Elements with More Than One Intermediate Stiffener

In the AISI North American Specification [7], new design equations are provided for determining the effective width of uniformly compressed stiffened elements with multiple intermediate stiffeners.

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