Specifications for the Design and Construction of Structural Supports for Highway Luminaires |
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AASHO Sign Support acceptable allowable stresses allowable unit stress Aluminum American applied Association axial compression bending stress Bridges buckling calculated coefficient column combined Committee compact compressive stress considered Construction covered criterion cross section davit deflection derived Design determined edge effects elastic element Engineer equal equation exceed fabrication factor failure fatigue Figure flange footings Formula given height HIGH TOWER Highway illumination indicated Institute joint length lighting limit located luminaire supports materials maximum metal method moment normal obtained occurs octagonal Paragraph placed pole type polygonal tubes practice pressure procedures proportioned protected radius range ratio reduced Reference removed requirements roadway round tubes safety factor shaft shapes shear stress shown Sign Support Specification square Standard Steel strength STRUCTURAL SUPPORTS structures TABLE tapered tests thickness torsion transverse truss type TUBULAR SHAPES values vibration wall welding width wind loads