ASTM A1123/A1123M-22

Standard Specification for Carbon Steel Laser and Laser-Hybrid Welded, Sharp-Cornered Profile (SCP), Built-Up, Square, Rectangular, and Special Shape Tube

SCOPE
1.1 This specification covers laser beam or laser hybrid welded, built-up, carbon steel, sharp-cornered profiles (SCP) square, rectangular, or custom shape structural tubing for welded, riveted, or bolted construction. This specification does not include weathering steels, since most cannot be welded by these methods. SCP tubing is used in, but not limited to, the following applications: buildings and structures, including architecturally exposed steel structures (AESS); architectural steel profiles such as curtain wall, staircases, and others; industrial; and general structural applications.
Note 1: There is no standard for other sharp-cornered laser or laser hybrid welded carbon steel structural shapes, but Appendix X1 provides guidance on their specification.  
1.2 The SCP structural tubing sections produced to this specification have a perimeter of 2845 mm [112 in.] or less and wall thickness of between 4.76 and 38.1 mm [3/16 and 1.50 in.]. The thicknesses of walls within a specified SCP tube shape can be different.  
1.3 This specification establishes the minimum requirements for manufacturing of built-up, SCP laser, and laser hybrid welded carbon steel tube sections and requires the welds to, at a minimum, match the tensile and yield strength of the base metal.
Note 2: Product covered by this specification is manufactured in small lots on dedicated production lines. Product quality requirements are ensured through welding procedure qualification of the manufacturing facility in accordance with AWS, ISO, or CSA requirements. In addition to the standard weld inspection and weld quality requirements, the purchaser can specify higher levels of weld inspection; Supplementary S1 tensile, S2 bend, and S3 Charpy V- notch lot testing; and other requirements.
Note 3: Because of the varying requirements of the end-use applications, four different length tolerance and weld inspection levels may be specified.  
1.4 This specification uses Specifications A36/A36M, A572/A572M, EN 10025-2, or EN 10025-3 for the chemical and mechanical requirements of the designated strength grade.  
1.5 The text of this specification contains notes and footnotes that provide explanatory material. Such notes and footnotes, excluding those in tables and figures, do not contain any mandatory requirements.  
1.6 Units—This specification is expressed in both inch-pound units and in SI units; however, unless the purchase order or contract specifies the applicable M specification designation (SI units), the inch-pound units shall apply. The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.  
1.7 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.8 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.

General Information

• Status: Published
• Publication Date: 31-Oct-2022
• ICS: 77.140.75 - Steel pipes and tubes for specific use
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.09 - Carbon Steel Tubular Products

Relations

• Refers: ASTM A370-24 - Standard Test Methods and Definitions for Mechanical Testing of Steel Products
• Effective Date: 01-Mar-2024
• Refers: ASTM A941-24 - Standard Terminology Relating to Steel, Stainless Steel, Related Alloys, and Ferroalloys
• Effective Date: 01-Mar-2024
• Refers: ASTM A700-14(2019) - Standard Guide for Packaging, Marking, and Loading Methods for Steel Products for Shipment
• Effective Date: 01-Nov-2019
• Refers: ASTM A370-19 - Standard Test Methods and Definitions for Mechanical Testing of Steel Products
• Effective Date: 01-Jul-2019
• Refers: ASTM A370-17a - Standard Test Methods and Definitions for Mechanical Testing of Steel Products
• Effective Date: 15-Nov-2017
• Refers: ASTM A673/A673M-17 - Standard Specification for Sampling Procedure for Impact Testing of Structural Steel
• Effective Date: 15-Nov-2017
• Refers: ASTM A941-17 - Standard Terminology Relating to Steel, Stainless Steel, Related Alloys, and Ferroalloys
• Effective Date: 01-Sep-2017
• Refers: ASTM A370-17 - Standard Test Methods and Definitions for Mechanical Testing of Steel Products
• Effective Date: 01-Jan-2017
• Refers: ASTM A941-15 - Standard Terminology Relating to Steel, Stainless Steel, Related Alloys, and Ferroalloys
• Effective Date: 01-Nov-2015
• Refers: ASTM A370-15 - Standard Test Methods and Definitions for Mechanical Testing of Steel Products
• Effective Date: 01-Nov-2015
• Refers: ASTM A700-14 - Standard Guide for Packaging, Marking, and Loading Methods for Steel Products for Shipment
• Effective Date: 01-Nov-2014
• Refers: ASTM A370-14 - Standard Test Methods and Definitions for Mechanical Testing of Steel Products
• Effective Date: 15-May-2014
• Refers: ASTM A370-13 - Standard Test Methods and Definitions for Mechanical Testing of Steel Products
• Effective Date: 15-Nov-2013
• Refers: ASTM A572/A572M-13a - Standard Specification for High-Strength Low-Alloy Columbium-Vanadium Structural Steel
• Effective Date: 01-Nov-2013
• Refers: ASTM A572/A572M-13 - Standard Specification for High-Strength Low-Alloy Columbium-Vanadium Structural Steel
• Effective Date: 01-Oct-2013

Overview

ASTM A1123/A1123M-22 is the internationally recognized standard specification for carbon steel laser and laser-hybrid welded, sharp-cornered profile (SCP) tubes, including square, rectangular, and special custom shapes. Developed by ASTM, this specification provides essential requirements for the manufacture, inspection, and performance of SCP tubing used in various structural applications. The standard addresses both inch-pound and SI units and outlines minimum criteria for materials, weld quality, and dimensional tolerances.

SCP tubes produced per ASTM A1123/A1123M-22 are primarily used in construction and architecture, industrial frameworks, and general structural environments where sharp-cornered profiles are desired for structural or aesthetic reasons. The standard does not cover weathering steels and focuses exclusively on materials suited to laser and laser-hybrid welding.

Key Topics

• Material and Manufacturing Requirements: Details the use of carbon steel plate, bar, sheet, or strip conforming to ASTM A36/A36M, A572/A572M, EN 10025-2, or EN 10025-3, emphasizing the need for certificates of compliance from steel suppliers.
• Welding Processes: Specifies laser beam or laser-hybrid welding as the only acceptable joining methods to create built-up, sharp-cornered structural profiles.
• Dimensional and Quality Tolerances: Sets out maximum perimeter, wall thickness, and permissible variations in dimensions, flatness, concavity, convexity, radius of corners, twist, camber, and overall length for SCP tubes.
• Testing and Inspection Levels: Provides guidance on weld inspection quality levels, including optional supplementary mechanical tests (tensile, bend, and Charpy V-notch impact), and outlines certification and documentation requirements.
• Workmanship, Finish, and Marking: Covers surface finish, removal of burrs, marking requirements, and packaging standards, ensuring products meet specified aesthetic and performance criteria.

Applications

ASTM A1123/A1123M-22 SCP tubing is designed for a diverse range of structural and architectural applications, including:

• Buildings and Structures: Utilized as part of load-bearing frameworks, columns, and beams, especially in projects that specify architecturally exposed structural steel (AESS) for its sharp, clean lines.
• Architectural Steel Profiles: Ideal for use in curtain wall systems, staircases, and other visually exposed steel features demanding crisp, sharp corners.
• Industrial Applications: Suitable for frameworks, machine supports, and other applications requiring precise tolerances and weld quality.
• General Structural Use: Can be fabricated and integrated into any welded, bolted, or riveted construction where high-quality carbon steel structural tubes are necessary.

By offering stringent weld quality and dimensional compliance, this standard provides confidence in product performance for engineers, architects, and fabricators.

Related Standards

Companies and professionals applying ASTM A1123/A1123M-22 may also reference or need compliance with several related standards:

• ASTM A36/A36M: Specification for Carbon Structural Steel
• ASTM A572/A572M: Specification for High-Strength Low-Alloy Structural Steel
• EN 10025-2/10025-3: Standards for hot-rolled structural steels
• AWS D1.1/D1.1M: Structural Welding Code - Steel
• ISO 15614-11 and ISO 15614-14: Welding procedure qualification for laser and laser-hybrid welding
• CSA W47.1: Certification for companies involved in fusion welding of steel
• ANSI/AISC 360: Specification for Structural Steel Buildings

Keywords: carbon steel welded tube, laser welded tube, SCP structural tubing, ASTM A1123/A1123M, sharp-cornered steel profile, square tube, rectangular tube, structural steel, architectural steel profiles, laser-hybrid welding

For detailed requirements, always refer to the full text of ASTM A1123/A1123M-22 and associated standards to ensure comprehensive compliance and product integrity.

Standards Content (Sample)

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:A1123/A1123M −22
Standard Specification for
Carbon Steel Laser and Laser-Hybrid Welded, Sharp-
Cornered Profile (SCP), Built-Up, Square, Rectangular, and
Special Shape Tube
This standard is issued under the fixed designation A1123/A1123M; the number immediately following the designation indicates the
year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last
reapproval. A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 1.4 This specification uses Specifications A36/A36M,
A572/A572M, EN 10025-2, or EN 10025-3 for the chemical
1.1 This specification covers laser beam or laser hybrid
and mechanical requirements of the designated strength grade.
welded, built-up, carbon steel, sharp-cornered profiles (SCP)
1.5 The text of this specification contains notes and foot-
square, rectangular, or custom shape structural tubing for
welded, riveted, or bolted construction.This specification does notes that provide explanatory material. Such notes and
footnotes, excluding those in tables and figures, do not contain
not include weathering steels, since most cannot be welded by
these methods. SCP tubing is used in, but not limited to, the any mandatory requirements.
following applications: buildings and structures, including
1.6 Units—This specification is expressed in both inch-
architecturally exposed steel structures (AESS); architectural
poundunitsandinSIunits;however,unlessthepurchaseorder
steel profiles such as curtain wall, staircases, and others;
or contract specifies the applicable M specification designation
industrial; and general structural applications.
(SIunits),theinch-poundunitsshallapply.Thevaluesstatedin
eitherinch-poundunitsorSIunitsaretoberegardedseparately
NOTE 1—There is no standard for other sharp-cornered laser or laser
hybrid welded carbon steel structural shapes, but Appendix X1 provides asstandard.Withinthetext,theSIunitsareshowninbrackets.
guidance on their specification.
Thevaluesstatedineachsystemmaynotbeexactequivalents;
therefore,eachsystemshallbeusedindependentlyoftheother.
1.2 The SCP structural tubing sections produced to this
Combiningvaluesfromthetwosystemsmayresultinnoncon-
specificationhaveaperimeterof2845mm[112in.]orlessand
formance with the standard.
wall thickness of between 4.76 and 38.1 mm [3/16 and 1.50
in.].ThethicknessesofwallswithinaspecifiedSCPtubeshape
1.7 This standard does not purport to address all of the
can be different.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
1.3 This specification establishes the minimum require-
priate safety, health, and environmental practices and deter-
ments for manufacturing of built-up, SCP laser, and laser
mine the applicability of regulatory limitations prior to use.
hybridweldedcarbonsteeltubesectionsandrequiresthewelds
1.8 This international standard was developed in accor-
to, at a minimum, match the tensile and yield strength of the
dance with internationally recognized principles on standard-
base metal.
ization established in the Decision on Principles for the
NOTE2—Productcoveredbythisspecificationismanufacturedinsmall
Development of International Standards, Guides and Recom-
lots on dedicated production lines. Product quality requirements are
mendations issued by the World Trade Organization Technical
ensured through welding procedure qualification of the manufacturing
Barriers to Trade (TBT) Committee.
facility in accordance with AWS, ISO, or CSA requirements. In addition
to the standard weld inspection and weld quality requirements, the
purchasercanspecifyhigherlevelsofweldinspection;SupplementaryS1
2. Referenced Documents
tensile, S2 bend, and S3 Charpy V- notch lot testing; and other require-
2.1 ASTM Standards:
ments.
A36/A36MSpecification for Carbon Structural Steel
NOTE 3—Because of the varying requirements of the end-use
applications, four different length tolerance and weld inspection levels A370Test Methods and Definitions for Mechanical Testing
may be specified.
of Steel Products
A572/A572MSpecification for High-Strength Low-Alloy
This specification is under the jurisdiction ofASTM Committee A01 on Steel,
Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee For referenced ASTM standards, visit the ASTM website, www.astm.org, or
A01.09 on Carbon Steel Tubular Products. contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Current edition approved Nov. 1, 2022. Published December 2022. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/A1123_A1123M-22. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
A1123/A1123M−22
Columbium-Vanadium Structural Steel 2.7 ISO Standards:
A673/A673MSpecification for Sampling Procedure for Im- ISO3452-1Non-destructivetesting-Penetranttesting-Part1:
pact Testing of Structural Steel General Principles
A700Guide for Packaging, Marking, and Loading Methods ISO 11666Non-destructive testing of welds – Ultrasonic
for Steel Products for Shipment testing – Acceptance levels
A941TerminologyRelatingtoSteel,StainlessSteel,Related ISO 12932Welding—Laser-arc hybrid welding of steels,
Alloys, and Ferroalloys nickel,andnickelalloys—Qualitylevelsforimperfections
E164Practice for Contact Ultrasonic Testing of Weldments ISO 13919-1 Welding and Laser-beam Welded Joints-
E165/E165MPractice for Liquid Penetrant Testing for Gen- guidance on Quality Levels for Imperfections—Part 1:
eral Industry Steel
E190Test Method for Guided Bend Test for Ductility of ISO 15609-4Specification and Qualification of Welding
Welds Procedures for Metallic Materials—Welding Procedure
E290Test Methods for Bend Testing of Material for Ductil- Specification
ity ISO 15609-6Specification and qualification of welding pro-
E1417/E1417MPractice for Liquid Penetrant Testing cedures for metallic materials—Welding procedure
specification—Part 6: Laser-arc hybrid welding
2.2 ANSI/AISC Standard:
ISO 15614-11Specification and Qualification of Welding
ANSI/AISC 303Code of Standard Practice for Steel Build-
Procedures for Metallic Materials—Welding Procedure
ings and Bridges
Test— Part 11: Electron and Laser Beam Welding
ANSI/AISC 360Specification for Structural Steel Buildings
ISO 15614-14Specification and Qualification of Welding
2.3 AWS Standards:
Procedures for Metallic Materials—Welding Procedure
AWS A3.0M/A3.0Standard Welding Terms and Definition,
Test— Part 14: Laser-Arc Hybrid Welding of Steels,
IncludingAdhesiveBonding,Brazing,Soldering,Thermal
Nickel and Nickel Alloys
Cutting, and Thermal Spraying
ISO 17638Non-destructive testing of welds – Magnetic
AWS B2.1/2.1MSpecification for Welding Procedure and
particle testing
Performance Qualification
ISO 17640Non-destructive testing of welds—Ultrasonic
AWS C7.2M Recommended Practices for Laser Beam
testing—Techniques, testing levels, and assessment
Welding, Cutting, and Allied Processes
ISO 23277Non-destructive testing of welds – Penetrant
AWS C7.4/C7.4M Process Specification and Operator
testing
Qualification for Laser Beam Welding
ISO 23278Non-destructive testing of welds – Magnetic
AWS C7.6/C7.6M Process Specification and Operator
particle testing of welds – Acceptance levels
Qualification for Laser Hybrid Welding
AWS D1.1/D1.1MStructural Welding Code—Steel
2.8 U.S. Military Standard:
2.4 CSA Group Standard: MIL-STD-129Military Marking for Shipment and Storage
CSAW47.1Certification of Companies for Fusion Welding
of Steel 3. Terminology
3.1 Definitions of general terms pertaining to this specifica-
NOTE4—Fusionweldingisanothertermusedtodescribelaserbeamor
laser-hybrid welding.
tion shall be those of Terminology A941.
2.5 EN Standards:
3.2 Definitions of terms pertaining to welding terminology
EN 10025-2Hot rolled products of structural steels—Part 2: shall be those of AWS A3.0M/A3.0.
Technical delivery conditions for non-alloy structural
steels
4. Ordering Information
EN 10025-3Hot rolled products of structural steels—Part 3:
4.1 Ordersformaterialunderthisspecificationshallcontain
Technical delivery conditions for normalized/normalized
information concerning as many of the following items as are
rolled weldable fine grain structural steels
required to describe the desired material adequately. Such
EN 10204Metallic Products: Types of Inspection Docu-
requirements shall include, but are not limited to:
ments
4.1.1 Quantity (metres [feet] or number of lengths);
2.6 Federal Standard:
4.1.2 Name of material [laser-welded carbon steel sharp-
Federal Standard No. 123Marking for Shipment
cornered profiles (SCP) tube];
4.1.3 Size(outsidedimensionsandwallthicknessforsquare
and rectangular tube (mm [inch]), and drawings for custom
Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
shapes, if applicable);
4th Floor, New York, NY 10036, http://www.ansi.org.
Available from American Welding Society (AWS), 8669 NW 36 St., #130,
Miami, FL 33166-6672, http://www.aws.org.
Available from Canadian Standards Association (CSA), 178 Rexdale Blvd.,
Toronto, ON M9W 1R3, Canada, http://www.csagroup.org. Available from International Organization for Standardization (ISO), ISO
Available from European Committee for Standardization (CEN), Avenue Central Secretariat, Chemin de Blandonnet 8, CP 401, 1214 Vernier, Geneva,
Marnix 17, B-1000, Brussels, Belgium, http://www.cen.eu. Switzerland, https://www.iso.org.
7 9
Available from U.S. Government Publishing Office (GPO), 732 N. Capitol St., Available from https://www.acq.osd.mil/log/SCI/.AIT.html/MIL-STD-
NW, Washington, DC 20401, http://www.gpo.gov. 129PCH4.pdf.
A1123/A1123M−22
4.1.4 Length(s) (metres [feet] and length tolerance level 5.5.1 ISO 13919-1 or ISO 12932 standard. If not otherwise
(L1, L2, L3 or L4, default is L1); specified, quality level B of ISO 13919-1 or ISO 12932
standard shall be met;
4.1.5 Steel type (Specification A36/A36M; designated
SpecificationA572/A572Mstrengthgrade;EN10025-2grade, 5.5.2 CSA W47.1; or
5.5.3 AWS C7.4/C7.4M classA, unless otherwise specified,
designation, and quality; or EN 10025-3 grade and quality
level); orAWS C7.6/C7.6M andAWS D1.1/D1.1M Clause 8 Inspec-
tion.
4.1.6 ASTM specification designation and edition year if
other than the latest edition; and
NOTE 6—The ISO, CSA, orAWS standards establish requirements for
4.1.7 Welding procedure qualification (AWS, ISO, or CSA,
manufacturing location welding procedure qualifications involved in
default, if not specified, is at manufacturer’s discretion). welding steel. These requirements are summarized in Appendix X2. The
ISO, CSA, and AWS requirements within each requirement category are
4.2 The purchaser has the option to specify additional
very similar, but there are differences, such as the frequency of certifica-
requirements, including but not limited to:
tion and whether third-party verification is required.
4.2.1 Supplementary requirements, if invoked;
6. Chemical Composition
4.2.1.1 S1. Tensile test;
4.2.1.2 S2. Bend test; and
6.1 The steel plate, bar, sheet, or strip shall conform to the
4.2.1.3 S3. Charpy V-notch impact test;
chemical composition requirements of Specification A36/
4.2.2 WeldInspectionLevel(W1,W2,W3,W4,anddefault
A36M; designated Specification A572/A572M strength grade;
is W1);
EN 10025-2 grade, designation, and quality; or EN 10025-3
4.2.3 Process welding procedure certification
grade and quality level. The steel manufacturer’s certificate of
4.2.4 Burr removal;
compliance is sufficient evidence of the composition of the
4.2.5 End condition; base metal.
4.2.6 Finish;
7. Mechanical Properties
4.2.7 Specialpackaging,markingorshipmentrequirements;
4.2.8 Special inspection requirements; and
7.1 The base metal and welded product or test specimens
4.2.9 Other special requirements.
excisedfromtheweldedproductshallconformtothemechani-
cal test requirements of Specification A36/A36M; designated
NOTE 5—A typical ordering description is: square tube, L100 × 100 ×
SpecificationA572/A572Mstrengthgrade;EN10025-2grade,
13mm[4×4× ⁄2 in.], 6m [20ft], carbon steel, ASTM Specification
AXXXX dated ____ with the following special requirements for weld designation, and quality; or EN 10025-3 grade and quality
inspection level X and length tolerance X.
level. The steel manufacturer’s certificate of compliance is
sufficient evidence of the mechanical properties of the base
5. Materials and Manufacture
metal.
5.1 Thesteelplate,bar,sheet,orstripshallconformwiththe
8. Dimensions, Mass, and Permissible Variations
requirements of the current version of Specification A36/
A36M; designated Specification A572/A572M strength grade;
8.1 Permissible Variation in Dimensions—The permissible
EN 10025-2 grade, designation, and quality; or EN 10025-3
variation in dimensions, measured across the flats at positions
grade and quality level.
at least 50 mm [2 in.] from the ends of the SCP tube shall not
vary from the specified outside dimensions by more than the
5.2 The supplier from which the steel plate, bar, sheet, or
applicable amount given in Table 1, which provides flatness
strip is purchased shall be required to provide certificates
requirements, and Table 2, which provides requirements for
documenting compliance with the raw material requirements.
maximum concavity or convexity. Flatness is measured on a
5.3 Products complying with this standard shall be built-up
line parallel to the axis of the tube. Convexity and concavity
tube manufactured by welding steel plate, bar, sheet, or strip
are measured on a line transverse to the axis of the tube.
using the laser beam or laser hybrid welding process. The
8.2 Wall Thickness—The minimum wall thickness shall be
welds shall be designed to develop the shear and tensile
95 % of the specified wall thickness. The maximum wall
strength of the thinner of the plates joined.
thickness,excludingtheweldseam,shallbenotmorethan5%
5.4 Laser or laser hybrid welding process shall be qualified
greater than the specified wall thickness.
in accordance with the welding qualification requirements of
NOTE 7—Manufacturers should consider the tolerance requirements of
one of the following:
the plate, bar, sheet, or strip standard, since specification of tighter
5.4.1 ISO 15614-11 or ISO 15614-14 and ISO 15609-4 or
tolerances may be necessary.
ISO 15609-6;
5.4.2 CSA W47.1; or
5.4.3 EitherAWS C7.4/C7.4M orAWS C7.6/C7.6M. When
complying with AWS requirements, the practices of AWS
TABLE 1 Permissible Variations in Outside Flat Dimensions for
C7.2M shall be used. Square, Rectangular, and Special Shape SCP Tube
Outside Dimensions, mm [in.] Permissible Variation, mm [in.]
5.5 Unless otherwise specified, the requirements of 5.5.1
#50 [2] 1 [0.040]
shall apply. The quality levels of welded joints shall be in
>50 [2] 1.5 [0.060]
accordance with:
A1123/A1123M−22
TABLE 2 Permissible Variations in Concavity or Convexity for
9.2.4 Surface imperfections such as handling marks, light
Built-Up, Square, Rectangular and Special Shape SCP Tube
die or roll marks, or shallow pits are not considered defects
Outside Dimensions, mm [in.] Permissible Variations, mm [in.]
provided that the imperfections are removable within the
#50 [2] 0.5 [0.020]
specifiedlimitsonwallthickness.Theremovalofsuchsurface
>50 [2] 0.01 times outer flat dimension
imperfections is not required. SCP shall be free of protruding
metal on the outside surface of the weld seam.
9.3 Finish—The default finish shall be ground and blasted.
8.3 Mass—On the basis that the density of rolled steel is
Specification of a different finish in ANSI/AISC 303, Table
3 3
7850 kg/m [0.2836 lb/in. ], the actual mass of an individual
10.1 AESS Category Matrix or a custom finish shall be
length of SCP shall not deviate from the mass specified by
contractually agreed.
more than –3.5 or +10 %.
9.4 Burr and End Condition—Unless otherwise specified in
8.4 Radius of Corners—The radius of each outside corner
the purchase order, structural products produced to this speci-
shall be 1 6 0.5 mm [0.04 6 0.02 in.].
fication shall be furnished with square cut ends with the burr
8.5 Squareness of Sides—Adjacent sides shall be square removed. When so specified in the purchase order, the burr
(90°) with a permissible variation of 61° max.
shall be removed on the outside perimeter or inside perimeter
or both.
8.6 Twist—The maximum permissible variation in twist
shall be 1 mm/m [0.012 in./ft]. Twist shall be determined by
10. Welding Procedure Qualification
holding one end of the product down on a flat surface plate,
10.1 The welding procedure qualification shall be per-
measuringtheheightthateachcorneronthebottomsideofthe
formed one time at each manufacturing location for Specifica-
SCP tube extends above the surface plate n
...