Civil Engineering Reference
In-Depth Information
Table 2.1 Examples of American Standards for Main Bridge Steel Products
Product
AASHTO
ASTM
Structural steel for bridges
M270/M 270M
A709/A709M
Pins, rollers, and rockers
M169
M102/M102M
A108
A668/A668M
Bolts
M164
M253
A307 grade A or B
A325
A490
Anchor bolts
M314-90
A307 grade C
Nuts
M291
A563
Washers
M293
F436
F959
Shear studs
M169
A108
Cast steel
M103/M103M
M163/M163M
A27/A27M
A743/A743M
Cast iron
M105 class 30
A48 class 30
Cables
A510
Galvanized wire
A641
Bridge strand/bridge rope
A586
A603
Wire rope
M277
Seven-wire strand
M203/M203M
A416/A416M
Table 2.2 Examples of Bridge Steels Available in the ASTM A709 Specification
Product
M270 A709
Grade
Weather
Resistance
Plates Shapes Bars
ASTM Description
36
A36 Carbon steel
No
Yes
Yes
Yes
A572 HSLA
a
50
steel
No
Yes
Yes
Yes
50S
A992 Structural steel
No
Yes
50W
A588 HSLA steel
Yes
Yes
Yes
Yes
Yes
Yes
HPS 70W A709 Heat-treated HSLA steel Yes
Yes
HPS 100W A709 Q&T Cu-Ni steel
c
Yes
Yes
a
HSLA high-strength low-alloy.
b
High-performance steel (HPS) grades with enhanced weldability and toughness.
c
Q&T Cu-Ni quenched and tempered copper-nickel steel.
the grade designation indicates the nominal yield strength in ksi (1 ksi is
equal to 6.895 MPa). The A709M specification is the metric version of
A709. According to ASTM, grade 36 and 50 steels have yield stresses of
36 and 50 ksi (248 and 344 MPa, respectively). Grade 50 steel is commonly
used for primary bridge members, which can be painted or galvanized in
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