ASTM A1075-12(2022)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:A1075 −12 (Reapproved 2022)
Standard Specification for
Flanged Steel U-Channel Posts
This standard is issued under the fixed designation A1075; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope A6/A6MSpecification for General Requirements for Rolled
Structural Steel Bars, Plates, Shapes, and Sheet Piling
1.1 ThisspecificationcoversflangedU-channelcarbonsteel
A29/A29MSpecificationforGeneralRequirementsforSteel
posts having a nominal weight ranging from 0.75lb⁄ft to
Bars, Carbon and Alloy, Hot-Wrought
6.0lb⁄ft and a nominal width ranging from 1.25in. to 4.0 in.
A36/A36MSpecification for Carbon Structural Steel
Thesepostsarefurnishedintheas-wroughtconditionintended
A123/A123MSpecification for Zinc (Hot-Dip Galvanized)
for applications requiring high tensile strength or crashworthi-
Coatings on Iron and Steel Products
ness and with a lower carbon (LC) designation for use where
A370Test Methods and Definitions for Mechanical Testing
higher ductility or improved weldability are required. These
of Steel Products
materials are available in multiple yield strength levels of
A499Specification for Steel Bars and Shapes, Carbon
50 ksi, 60 ksi, 70 ksi, and 80 ksi (345 MPa, 420 MPa,
Rolled from “T” Rails
485MPa, and 550MPa). The 50ksi and 60ksi (345MPa and
A572/A572MSpecification for High-Strength Low-Alloy
420MPa) yield strength grades are available as lower carbon
Columbium-Vanadium Structural Steel
posts, designated as Grades 50LC or 60LC.
2.2 AASHTO Standard:
NOTE 1—This specification does not cover high-strength low-alloy
(HSLA) post. Refer to Specification A572/A572M for HSLA. For AASHTOManual for Assessing Safety Hardware
structural Grade 36, refer to Specification A36/A36M.
3. Terminology
1.2 Units—The values stated in inch-pound units are to be
regarded as the standard. The values given in parentheses are
3.1 Definitions of Terms Specific to This Standard:
mathematical conversions to SI units that are provided for
3.1.1 crashworthiness, n—abilityofsigns,signals,andother
information only and are not considered standard.
safety hardware to fail in such a manner so as not to shatter or
cause injury to passengers in vehicles involved in an impact or
1.3 This standard does not purport to address all of the
collision.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
3.1.2 lot, n—for product produced from rolled “T” rails, a
priate safety, health, and environmental practices and deter-
lot shall consist of material of the same size product produced
mine the applicability of regulatory limitations prior to use.
in one shift in accordance with Specification A499.
1.4 This international standard was developed in accor-
3.1.3 U-channel post, n—bars with a “flanged U shape” to
dance with internationally recognized principles on standard-
provide increased stiffness when loaded in the transverse
ization established in the Decision on Principles for the
direction, typically having punched holes and primarily used
Development of International Standards, Guides and Recom-
for the attachment of highway signs.
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
4. Ordering Information
2. Referenced Documents 4.1 Orders for material under this specification should
include the following information:
2.1 ASTM Standards:
4.1.1 Quantity (weight or number of pieces);
A1Specification for Carbon Steel Tee Rails
4.1.2 Name of material (steel posts);
4.1.3 Gradeofsteel(Grades50,50LC,60,60LC,70,or80);
This specification is under the jurisdiction ofASTM Committee A01 on Steel,
Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee 4.1.4 Weight per foot;
A01.15 on Bars.
4.1.5 Condition (as-rolled, painted, powder coated, or gal-
Current edition approved Sept. 1, 2022. Published September 2022. Originally
vanized);
ɛ1
approved in 2012. Last previous edition approved in 2017 as A1075–12 (2017) .
DOI: 10.1520/A1075-12R22.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Available from American Association of State Highway and Transportation
Standards volume information, refer to the standard’s Document Summary page on Officials (AASHTO), 444 N. Capitol St., NW, Suite 249, Washington, DC 20001,
the ASTM website. http://www.transportation.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
A1075−12 (2022)
TABLE 2 Mechanical Requirements
4.1.6 Hole punching, if required;
4.1.7 ASTM designation and date of issue; Grade 50LC 60LC 50 60 70 80
4.1.8 Certification, if required (Section 11); Yield strength, 50 60 50 60 70 80
min, ksi (MPa) (345) (415) (345) (415) (485) (550)
4.1.9 Product marking; and
Tensile strength, 70 80 80 90 95 110
4.1.10 Product packaging and package marking.
min, ksi (MPa) (485) (550) (550) (620) (655) (760)
Elongation in 8 in or 12 10 5 5 5 5
NOTE 2—A typical ordering description is as follows: 1000 pieces,
200 mm, min, %
flanged u-channel post, Grade 60, 8 ft (2.4 m) long, 2 lb (0.9 kg) per foot,
Elongation in 2 in or 14 12 7 7 7 7
as-rolled, ASTM AXXXX dated _______.
50 mm, min, %
5. Materials and Manufacture
5.1 Feedstock—Material may be manufactured from re-
8. Dimensions, Mass, and Permissible Variations
rolled rail steel or rolled from billet steel.
8.1 Dimensions—Because of differences in mill facilities,
5.2 Material produced from rerolled rails shall be made to
tolerances of post sections vary among the manufacturers and
conform to Specification A499.
suchtolerancesaresubjecttoagreementbetweenmanufacturer
5.3 Material produced from billet steel shall be made by the
and purchaser.
commercially available steel-making processes.
8.2 Weight per Unit Length—The permissible variation for
5.4 Postsshallbesuppliedinthehotrolledcondition,unless
weight per foot shall be in accordance with the requirements
otherwise specified in the purchase order.
specified in Table 3.
8.3 Length—The permissible variations for length shall be
6. Chemical Composition
in accordance with the requirements specified in Table 4.
6.1 Material rerolled from rails shall conform to the chem-
8.4 Straightness—Variationsinstraightnessshallnotexceed
istry requirements of Speci
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