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ASTM A1044/A1044M-05(2010)

(Specification)

Standard Specification for Steel Stud Assemblies for Shear Reinforcement of Concrete

Standard Specification for Steel Stud Assemblies for Shear Reinforcement of Concrete

SCOPE
1.1 This specification covers steel stud assemblies for shear reinforcement of concrete. Stud assemblies consist of either single-headed studs attached to a steel base rail by welding, or double-headed studs mechanically crimped into a steel shape.
Note 1—The configuration of the studs for stud assemblies is much different than the configuration of the headed-type studs prescribed in Section 7, Figure 7.1 of AWS D1.1/D1.1M. Ratios of the cross-sectional areas of the head-to-shank of the AWS D1.1/D1.1M studs range from about 2.5 to 4. In contrast, this specification requires the area of the head of the studs for stud assemblies to be at least 10 times the area of the shank. Thus, the standard headed-type studs in Section 7, Figure 7.1 of AWS D1.1/D1.1M do not conform to the requirements of this specification for use as stud assemblies for shear reinforcement.
1.2 This specification is applicable for orders in either inch-pound units or in SI units.
1.3 The values stated either in inch-pound or SI units are to be regarded as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with this specification.

General Information

Status
Historical
Publication Date
31-Oct-2010
ICS
91.080.40 - Concrete structures
Technical Committee
A01 - Steel, Stainless Steel and Related Alloys
Drafting Committee
A01.05 - Steel Reinforcement
Current Stage
Ref Project

Relations

Replaces
ASTM A1044/A1044M-05 - Standard Specification for Steel Stud Assemblies for Shear Reinforcement of Concrete
Effective Date
01-Nov-2010
Replaced By
ASTM A1044/A1044M-15 - Standard Specification for Steel Stud Assemblies for Shear Reinforcement of Concrete
Effective Date
01-Mar-2015

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ASTM A1044/A1044M-05(2010) - Standard Specification for Steel Stud Assemblies for Shear Reinforcement of ConcreteASTM A1044/A1044M-05(2010) - Standard Specification for Steel Stud Assemblies for Shear Reinforcement of Concrete
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ASTM A1044/A1044M-05(2010) - Standard Specification for Steel Stud Assemblies for Shear Reinforcement of Concrete
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:A1044/A1044M −05(Reapproved 2010)
Standard Specification for
Steel Stud Assemblies for Shear Reinforcement of
1
Concrete
This standard is issued under the fixed designation A1044/A1044M; 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 2.3 U.S. Military Standards:
4
MIL-STD-129Marking for Shipment and Storage
1.1 This specification covers steel stud assemblies for shear
MIL-STD-163SteelMillProductsPreparationforShipment
reinforcement of concrete. Stud assemblies consist of either
4
and Storage
single-headed studs attached to a steel base rail by welding, or
2.4 U.S. Federal Standard:
double-headed studs mechanically crimped into a steel shape.
4
Fed. Std. No. 123Marking for Shipment (Civil Agencies)
NOTE 1—The configuration of the studs for stud assemblies is much
different than the configuration of the headed-type studs prescribed in
Section 7, Figure 7.1 of AWS D1.1/D1.1M. Ratios of the cross-sectional
3. Terminology
areas of the head-to-shank of the AWS D1.1/D1.1M studs range from
3.1 Definitions of Terms Specific to This Standard:
about 2.5 to 4. In contrast, this specification requires the area of the head
of the studs for stud assemblies to be at least 10 times the area of the 3.1.1 headed stud, n—a steel bar used in the reinforcement
shank. Thus, the standard headed-type studs in Section 7, Figure 7.1 of
of concrete that has a head formed at one or both ends.
AWS D1.1/D1.1M do not conform to the requirements of this specifica-
3.1.2 base rail, n—the steel shape or plate that a group of
tion for use as stud assemblies for shear reinforcement.
headed studs is attached to by welding or other means.
1.2 This specification is applicable for orders in either
3.1.2.1 Discussion—Stud assemblies comprised of single-
inch-pound units or in SI units.
headedstudsrequireabaserail;thebaserailactsasastructural
1.3 The values stated either in inch-pound or SI units are to
element to provide anchorage to the concrete. For stud assem-
beregardedasstandard.Withinthetext,theSIunitsareshown
blies in which double-headed studs are mechanically crimped
in brackets. The values stated in each system are not exact
into a base rail, for example, into a steel channel, the base rail
equivalents; therefore, each system must be used indepen-
is not required to provide anchorage to the concrete; the
dently of the other. Combining values from the two systems
purpose of the base rail is to hold the studs in the appropriate
may result in nonconformance with this specification.
location, direction, and spacing until the concrete is cast.
2. Referenced Documents
4. Ordering Information
2
2.1 ASTM Standards:
4.1 It shall be the responsibility of the purchaser to specify
A29/A29MSpecificationforGeneralRequirementsforSteel
all requirements that are necessary for material ordered to this
Bars, Carbon and Alloy, Hot-Wrought
specification. Such requirements shall include but are not
A36/A36MSpecification for Carbon Structural Steel
limited to the following:
A370Test Methods and Definitions for Mechanical Testing
4.1.1 Name of product: stud assemblies for shear reinforce-
of Steel Products
ment of concrete,
2.2 AWS Standard:
4.1.2 Quantity of studs by diameter,
3
AWS D1.1/D1.1M-2004Structural Welding Code—Steel
4.1.3 Number of heads per stud,
4.1.4 Dimensions of base rail, if included,
4.1.5 Overall height of stud assembly,
1
This specification is under the jurisdiction ofASTM Committee A01 on Steel,
4.1.6 Number of studs per each assembly and their spacing
Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee
A01.05 on Steel Reinforcement. (see Note 2),
Current edition approved Nov. 1, 2010. Published November 2010. Originally
4.1.7 Packaging, and
approved in 2005. Last previous edition approved in 2005 as A1044/A1044M–05.
4.1.8 ASTM designation and year of issue.
DOI: 10.1520/A1044_A1044M-05R10.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
NOTE2—Inthecaseoforderingstudsratherthanassemblies,thelength
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
3 4
Available from TheAmerican Welding Society (AWS), 550 NW LeJeune Rd., Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
Miami, FL 33126. Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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A1044/A1044M−05
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1.1 This specification covers steel stud assemblies for shear reinforcement of concrete. Stud assemblies consist of either single-headed studs (Type 1) attached to a structural steel base rail by structural welding or stud welding, or double-headed studs (Type 2) mechanically crimped into a non-structural steel shape or attached to a steel plate by spot welding or tack welding. These stud assemblies are not intended for use as shear connectors in steel-concrete composite construction.
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3.2 This test method also provides information on the condition of bridge decks without overlays and with portland cement concrete overlays.  
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1.2.1 As the reinforcing steel corrodes, it expands and creates a crack or subsurface fracture plane in the concrete at or just above the level of the reinforcement. The fracture plane, or delamination, may be localized or may extend over a substantial area, especially if the concrete cover to the reinforcement is small. It is not uncommon for more than one delamination to occur on different planes between the concrete surface and the reinforcing steel. Delaminations are not visible on the concrete surface. However, if repairs are not made, the delaminations progress to open spalls and, with continued corrosion, eventually affect the structural integrity of the deck.  
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