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
Relations
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
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:
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
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.
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
2.1 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,
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,
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.
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
A1044/A1044M−05 (2010)
A
ofthestudsshouldbespecifiedsuchthattheappropriateheightofthestud TABLE 2 Tensile Requirements—Base Rail Material
assembly is achieved.
Tensile strength, min, psi [MPa] 65 000 [450]
Yield strength, min, psi [MPa] 44 000 [300]
Elongation in 8 in. [200 mm], min, % 20
5. Materials and Manufacture
A
Studs welded to base rail.
5.1 Headedstudsshallbemanufacturedfromsteelconform-
ing to Specification A29/A29M, Grades 1010 through 1020.
The stud material shall conform to the requirements for tensile
properties prescribed in Table 1.
conducted by the assembly manufacturer, or an inspection
5.2 Base Rails:
agency, or the stud supplier.
5.2.1 For stud assemblies in which the studs are welded to
6.2 Tensile testing shall be performed in accordance with
a base rail, the base rail material shall conform to 5.2.1.1,
the requirements described in Test Methods and Definitions
5.2.1.2,or 5.2.1.3.
A370.Tensile testing of headed studs shall be performed using
5.2.1.1 The base rail material, except for tensile properties,
a test fixture as described in Section 7.3.2 of AWS D1.1/
shall conform to Specification A36/A36M or equivalent. The
D1.1M.
base rail material shall conform to the requirements for tensile
properties prescribed in Table 2.
7. Acceptance Criteria
5.2.1.2 Base rail material conforming to the minimum
7.1 In addition to meeting the strength requirements of 5.1
required tensile properties in Specification A36/A36M shall be
and 5.2, no observed partial or total fracture of the head, the
permitted provided the base rail thickness is increased by a
studweld,orotherstud-baserailconnectionshallbepermitted.
factorequaltotheminimumyieldstrengthspecifiedinTable2
Thefailureshalloccureitherinthestudmaterialaminimumof
divided by the minimum yield strength required by Specifica-
one-half shank diameter from the head-to-shank or stud-to-
tion A36/A36M.
base rail connection, or by tearing a hole in the base rail.
5.2.1.3 Baserailmaterialselectedbythemanufacturershall
Failure of the head or stud-to-base rail connection within the
be permitted subject to agreement with the purchaser. The
attachmentregionshallbecauseforrejection.Thetensileforce
manufacturer shall furnish documentation to the purchaser in
at which failure occurs shall exceed the minimum yield
the form of test reports that confirms the suitability of the
strength of the stud.
selected base rail material for: (1) manufacturing stud assem-
blies;and (2)structuraladequacyofthestudassembliesforthe
8. Number of Tests
intended application.
8.1 A minimum of two tensile tests shall be conducted
5.2.2 For stud assemblies in which double-headed studs are
during a production shift or period. It shall be permissible to
mechanically crimped into a steel shape, the steel shape shall
test separate base rail material of the same thickness, chemical
be sufficiently stiff to hold the studs in appropriate location,
composition, and configuration of the base rails used in
direction, and spacing.
production. One test at the start and one test at the end of each
5.3 For stud assemblies in which the studs are attached to
8-h production shift or less than 8-h production period, or at
base rails by stud welding, the stud welding shall conform to
random intervals during the production period, shall be con-
AWS D1.1/D1.1M, including the provisions for production
ducted.
control, and fabrication and verification requirements.
8.2 In the event different heats of stud or base rail material
5.4 Dimensions:
withinthesamematerialspecificationareusedtoproducestud
5.4.1 Minimum dimensions of headed studs and plate base
assemblies during a production run, a minimum of two tensile
rails shall conform to Table 3.
tests in accordance with Section 6 shall be conducted to verify
NOTE 3—The configurations of stud assemblies are shown in Fig. 1.
the production method, product quality, and weldability of the
heats of materials prior to continuing production.
5.4.2 Headed studs with heads that have variable thickness
shallbepermitted,providedtheymeetthetensilerequirements
8.3 Any identified procedural or performance deficiencies
of this specification.
shall be corrected and testing repeated until the tensile test
results meet the requirements of this specification.
6. Tensile Tests
9. Retests
6.1 At periodic intervals, tensile tests of the headed stud
with a single or double head formed at one or both ends of the
9.1 If the tension test fails before meeting the specified
shankorweldedtothebaserailshallbeperformedasspecified
minimum yield strength of the headed stud material per Table
in the quality assu
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.