751.3 Structural Steel Design Properties: Difference between revisions

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==751.3.1 Structural Steel (AASHTO M270/ASTM A709)==
'''Structural Steel (AASHTO M270/ASTM A709)'''


All structural steel will be AASHTO M270/ASTM A709 Grade 36 (<math>\,F_y</math> = 36 ksi) or Grade 50 (<math>\,F_y</math> = 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 <math>\,F_y</math> greater than 50 ksi.'''
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) and structural steel HP piling will be AASHTO M270/ASTM A709 Grade 50S (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.  '''See Project Manager for use of structural steel with F<sub>y</sub> greater than 50 ksi.'''


{|border="1" style="text-align:center;" cellpadding="5" align="center"  
{|border="1" style="text-align:center;" cellpadding="5" align="center"  
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|+'''Available Material'''
|+'''Available Material'''
|-  
|-  
|'''Grade'''||Minimum Yield Strength, <math>\,F_y</math>(ksi)||MaximumPlateThickness(inches)||Shapes
!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 (*)||All
|36||36||4<sup>1</sup> ||All
|-
|-
|50||50||4||All
|50||50||4||All
|-
|-
|50W||50||4||All
|50W||50||4||All
|-
|50S||50|| N/A|| HP pile
|-
|-
| rowspan="2"| HPS70W
| rowspan="2"| HPS70W
| rowspan="2"| 70 ||2" TMCP (**)|| rowspan="2"| N/A  
| 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.
|-
|-
|4" Q & T (***)
|colspan="4" align="left"|<sup>2</sup> TMCP, Thermo Mechanical Controlled Process
|-
|colspan="4" align="left"|<sup>3</sup> Q&T, Quenched & Tempered
|}
|}


:(*) 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


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

Revision as of 10:25, 17 May 2019

Structural Steel (AASHTO M270/ASTM A709)

All structural steel will be AASHTO M270/ASTM A709 Grade 36 (Fy = 36 ksi) or Grade 50 (Fy = 50 ksi) and structural steel HP piling will be AASHTO M270/ASTM A709 Grade 50S (Fy = 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 Fy greater than 50 ksi.

Available Material
Grade Minimum Yield Strength,
Fy, ksi		 Maximum Plate Thickness,
inches		 Shapes
36 36 41 All
50 50 4 All
50W 50 4 All
50S 50 N/A HP pile
HPS70W 70 2" TMCP2 N/A
4" Q&T3
1 Thickness of plate up to 8 inches may be used when fabricating bearings using ASTM A709 Grade 36 steel.
2 TMCP, Thermo Mechanical Controlled Process
3 Q&T, Quenched & Tempered
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