1、Designation:A107512Standard Specification forFlanged Steel U-Channel Posts1This standard is issued under the fixed designation A1075;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses in
2、dicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers flanged U-channel carbon steelposts having a nominal weight ranging from 0.75 to 6.0 lb/ftand a nominal width ranging from 1.25 to 4.0 in
3、.These postsare furnished in the as-wrought condition intended for appli-cations requiring high tensile strength or crashworthiness andwith a lower carbon(LC)designation for use where higherductility or improved weldability are required.These materialsare available in multiple yield strength levels
4、of 50,60,70,and80 ksi(345,420,485,and 550 MPa).The 50-and 60-ksi(345-and 420-MPa)yield strength grades are available as lowercarbon posts,designated as Grades 50LC or 60LC.NOTE1This specification does not cover high-strength low-alloy(HSLA)post.Refer to Specification A572/A572M for HSLA.Forstructura
5、l Grade 36,refer to Specification A36/A36M.1.2 UnitsThe values stated in inch-pound units are to beregarded as the standard.The values given in parentheses aremathematical conversions to SI units that are provided forinformation only and are not considered standard.1.3 This standard does not purport
6、 to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2A1 Specifi
7、cation for Carbon Steel Tee RailsA6/A6M Specification for General Requirements for RolledStructural Steel Bars,Plates,Shapes,and Sheet PilingA29/A29M Specification for Steel Bars,Carbon and Alloy,Hot-Wrought,General Requirements forA36/A36M Specification for Carbon Structural SteelA123/A123M Specifi
8、cation for Zinc(Hot-Dip Galvanized)Coatings on Iron and Steel ProductsA370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA499 Specification for Steel Bars and Shapes,CarbonRolled from“T”RailsA572/A572M Specification for High-Strength Low-AlloyColumbium-Vanadium Structural Steel
9、2.2 AASHTO Standard:AASHTO Manual for Assessing Safety Hardware33.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 crashworthiness,nability of signs,signals,and othersafety hardware to fail in such a manner so as not to shatter orcause injury to passengers in vehicles involved in
10、an impact orcollision.3.1.2 lot,nfor product produced from rolled“T”rails,alot shall consist of material of the same size product producedin one shift in accordance with Specification A499.3.1.3 U-channel post,nbars with a“flanged U shape”toprovide increased stiffness when loaded in the transversedi
11、rection,typically having punched holes and primarily usedfor the attachment of highway signs.4.Ordering Information4.1 Orders for material under this specification shouldinclude the following information:4.1.1 Quantity(weight or number of pieces);4.1.2 Name of material(steel posts);4.1.3 Grade of st
12、eel(Grades 50,50LC,60,60LC,70,or80);4.1.4 Weight per foot;4.1.5 Condition(as-rolled,painted,powder coated,or gal-vanized);4.1.6 Hole punching,if required;4.1.7 ASTM designation and date of issue;4.1.8 Certification,if required(Section 11);4.1.9 Product marking;and4.1.10 Product packaging and package
13、 marking.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.15 on Bars.Current edition approved March 1,2012.Published April 2012.DOI:10.1520/A1075-12.2For referenced ASTM standards,visit
14、 the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from American Association of State Highway and TransportationOfficials(AASHTO),444 N.Capito
15、l St.,NW,Suite 249,Washington,DC 20001,http:/www.transportation.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 NOTE2A typical ordering description is as follows:1000 pieces,flanged u-channel post,Grade 60,8 ft(2.4 m)long,2 lb(0.9 kg)
16、per foot,as-rolled,ASTM AXXXX dated _.5.Materials and Manufacture5.1 FeedstockMaterial may be manufactured from re-rolled rail steel or rolled from billet steel.5.2 Material produced from rerolled rails shall be made toconform to Specification A499.5.3 Material produced from billet steel shall be made by thecommercially available steel-making processes.5.4 Posts shall be supplied in the hot rolled condition,unlessotherwise specified in the purchase order.6.Chemical Composition6.1 Material reroll
