Page 323 - Civil Engineering Formulas

Design Criteria for Symmetrical Flexural Sections for Load-Factor Design of Bridges
Flange minimum Maximum Web minimum unbraced length l b , thickness t u , thickness t f , in (mm) in (mm) in (mm) 2200(M 1 /M u )]r y [3600 d 2 F y b 2 F y F y 608 65.0 A f 20,000 h b 2 F y F y d 150 69.6 ________________________________ See AAS

Maximum bending strength M u, in kip (mm kN) F y Z F y S ___________________________________ should be maintained as well as the following: For compact sections, when both b /t f is the yield strength of the flange, ksi (MPa); t w is the web thickness, in (mm);

TABLE 10.3 Type of section Compact* Braced noncompact † Unbraced interaction equation applies: where F yf

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