751.3 Structural Steel Design Properties

751.3.1 Structural Steel (AASHTO M270/ASTM A709)

All structural steel will be AASHTO M270/ASTM A709 Grade 36 (Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle \,F_y} = 36 ksi) or Grade 50 ($\,F_{y}$ = 50 ksi) except where weathering steel (AASHTO M270/ASTM A709 Grade 50W steel) is indicated on the Design Layout or in special cases. See Project Manager for use of structural steel with Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle \,F_y} greater than 50 ksi.

Available Material

Grade	Minimum Yield Strength, $\,F_{y}$(ksi)	MaximumPlateThickness(inches)	Shapes
36	36	4 (*)	All
50	50	4	All
50W	50	4	All
HPS70W	70	2" TMCP (**)	N/A
		4" Q & T (***)

(*) Thickness of plate up to 8 inches may be used when fabricating bearings using ASTM A709 Grade 36 steel.

(**) TMCP, Thermo Mechanical Controlled Process

(***) Q&T, Quenched & Tempered