View source for 751.3 Structural Steel Design Properties

'''Structural Steel (AASHTO M270/ASTM A709)'''

All structural steel will be AASHTO M270/ASTM A709 Grade 36 (F<sub>y</sub> = 36 ksi) or Grade 50 (F<sub>y</sub> = 50 ksi) except where weathering steel (AASHTO M270/ASTM A709 Grade 50W steel) is indicated on the Design Layout or in special cases. Welded or seamless steel shell (pipe) for CIP pile will be ASTM A252 Modified Grade 3 (F<sub>y</sub> = 50 ksi). For pipe common available nominal wall thicknesses, see [[751.36_Driven_Piles#751.36.2.2.2_Cast-In-Place_(CIP)_Pile|EPG 751.36.2.2.2]]. '''See Project Manager for use of structural steel with F<sub>y</sub> greater than 50 ksi.'''

Note: ASTM A709 Grade 50S shall not be specified for HP piles or other structural shapes without prior confirmation of the availability of the material.

{|border="1" style="text-align:center;" cellpadding="5" align="center" 
|- 
|+'''Available Material'''
|-	 	 	 
!style="background:#BEBEBE"|Grade!!style="background:#BEBEBE"|Minimum Yield Strength,<br/>F<sub>y</sub>, ksi!!style="background:#BEBEBE"|Maximum Plate Thickness,<br/>inches!!style="background:#BEBEBE"|Shapes
|-
|36||36||4<sup>1</sup> ||All
|-
|50||50||4||All
|-
|50W||50||4||All
|-
| rowspan="2"| HPS70W
| rowspan="2"| 70 ||2" TMCP<sup>2</sup>|| rowspan="2"| N/A 
|-
|4" Q&T<sup>3</sup>
|-
|colspan="4" align="left" width="450"|<sup>1</sup> Thickness of plate up to 8 inches may be used when fabricating bearings using ASTM A709 Grade 36 steel.
|-
|colspan="4" align="left"|<sup>2</sup> TMCP, Thermo Mechanical Controlled Process
|-
|colspan="4" align="left"|<sup>3</sup> Q&T, Quenched & Tempered
|}

[[Category:751 LRFD Bridge Design Guidelines|751.03]]