CIVIL ENGINEERING FORMULAS

(Frankie) #1
TABLE 10.6 Maximum Width /Thickness Ratios b/tafor Compression Elements for Highway Bridgesb

Load-and-resistance-factor designc
Description of element Compact Noncompactd

Flange projection of rolled or
fabricated I-shaped beams

Webs in flexural compression 150

Allowable-stress designf
fa0.44Fy

Description of element fa0.44Fy Fy36 ksi (248 MPa) Fy50 ksi (344.5 MPa)

Plates supported in one side and
outstanding legs of angles
In main members 12 11

51
wfa 12

608
2 Fy

70 e
2 Fy

65
2 Fy

264

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