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ASTM A704/A704M-01

(Specification)

Standard Specification for Welded Steel Plain Bar or Rod Mats for Concrete Reinforcement

Standard Specification for Welded Steel Plain Bar or Rod Mats for Concrete Reinforcement

SCOPE
1.1 This specification covers material in mat (or sheet) form fabricated from hot rolled, plain steel bars or rods to be used for the reinforcement of concrete. The mats shall consist of two layers of bars or rods which are assembled by welding at right angles to each other.
1.2 This specification is applicable for orders in either inch-pound units (as A 704) or in SI units [as A 704M].
1.3 The values stated in either inch-pound units 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
09-Sep-2001
ICS
77.140.15 - Steels for reinforcement of concrete
Technical Committee
A01 - Steel, Stainless Steel and Related Alloys
Drafting Committee
A01.05 - Steel Reinforcement
Current Stage
Ref Project

Relations

Replaces
ASTM A704/A704M-96 - Standard Specification for Welded Steel Plain Bar or Rod Mats for Concrete Reinforcement
Effective Date
10-Sep-2001
Replaced By
ASTM A704/A704M-05 - Standard Specification for Welded Steel Plain Bar or Rod Mats for Concrete Reinforcement
Effective Date
01-Mar-2005

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ASTM A704/A704M-01 - Standard Specification for Welded Steel Plain Bar or Rod Mats for Concrete ReinforcementASTM A704/A704M-01 - Standard Specification for Welded Steel Plain Bar or Rod Mats for Concrete Reinforcement
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ASTM A704/A704M-01 - Standard Specification for Welded Steel Plain Bar or Rod Mats for Concrete Reinforcement
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: A 704/A 704M – 01
Standard Specification for
Welded Steel Plain Bar or Rod Mats for Concrete
1
Reinforcement
This standard is issued under the fixed designationA704/A704M; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
1.1 This specification covers material in mat (or sheet) form
3. Ordering Information
fabricated from hot rolled, plain steel bars or rods to be used
3.1 The purchaser should specify:
forthereinforcementofconcrete.Thematsshallconsistoftwo
3.1.1 Quantity, no. of mats and/or area,
layers of bars or rods which are assembled by welding at right
3.1.2 Sizeandspacingofsteelbarsorrodsineachdirection,
angles to each other.
3.1.3 Plain bar or rod,
1.2 This specification is applicable for orders in either
3.1.4 Grade required (Grade 40 or 60 [300 or 420] as
inch-pound units (as A 704) or in SI units [as A 704M].
appropriate),
1.3 The values stated in either inch-pound units or SI units
3.1.5 Type of steel, as appropriate (see Section 4), and
are to be regarded as standard. Within the text, the SI units are
3.1.6 ASTM designation and year of issue.
shown in brackets. The values stated in each system are not
exact equivalents; therefore, each system must be used inde-
NOTE 1—Atypical ordering description is as follows: 1000 welded bar
1
pendentlyoftheother.Combiningvaluesfromthetwosystems mats; Grade 40; toASTMA 704 – ______. 6 by 12 in.; ⁄2 in. diameter by
1
120 in. longitudinal tip to tip, outer bars spaced 54 in.; ⁄2 in. diameter by
may result in nonconformance with this specification.
60 in. transverse, outer bars spaced 108 in. [1000 welded bar mats; Grade
300; to ASTM A 704M – ______. 150 by 300 mm; 12 mm diameter by
2. Referenced Documents
3000 mm longitudinal tip-to-tip, outer bars spaced 1350 mm; 12 mm
2.1 ASTM Standards:
diameter by 1500 mm transverse, outer bars spaced 2750 mm].
A 185 Specification for Steel Welded Wire, Fabric, Plain,
2
for Concrete Reinforcement
4. Materials
A 615/A615M Specification for Deformed and Plain Billet-
4.1 Plain bars or rods of Grades 40 and 60 [300 and 420]
2
Steel Bars for Concrete Reinforcement
used in the manufacture of mats shall conform to Specification
A 497 Specification for Steel Welded Wire Fabric, De-
A 615 [A 615M] or Specification A 706/A 706M.
2
formed, for Concrete Reinforcement
3
4.2 Maximum size of bar and rod material shall be ⁄4 in. [19
A 700 Practices for Packaging, Marking, and Loading
mm] nominal diameter. Minimum size of rod material shall be
3
Methods for Steel Products for Domestic Shipment
7
⁄32 in. [6 mm] nominal diameter.
A 706/A 706M Specification for Low-Alloy Steel De-
2
formed and Plain Bars for Concrete Reinforcement 5. Fabrication
E 29 Practice for Using Significant Digits in Test Data to
5.1 Fabricated mats shall be composed of two layers of
4
Determine Conformance with Specifications
plain bars or rods substantially parallel and perpendicular to
2.2 U.S. Military Standards:
each other.
MIL-STD 129 Marking for Shipment and Storage
5.2 Assembly—Mats shall be assembled by means of weld-
MIL-STD163 SteelMillProductsPreparationforShipment
ing to provide attachment at all intersections.
and Storage
5.2.1 Welded joints shall withstand normal shipping and
2.3 U.S. Federal Standard:
handling without becoming broken, but the presence of broken
welds, regardless of cause, shall not constitute cause for
rejection unless the number of broken welds per sheet exceed
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
1 % of the total, provided that not more than one half of the
Stainless Steel, and RelatedAlloys and is the direct responsibility of Subcommittee
permissible maximum number of broken welds are located on
A01.05 on Steel Reinforcement.
Current edition approved September 10, 2001. Published October 2001. Origi-
any one bar or rod.
nally published as A 704 – 74. Last previous edition A 704/A 704M – 96.
5.2.2 Welding shall be done in such a manner that the
2
Annual Book of ASTM Standards, Vol 01.04.
3 minimum tensile strength, yield strength, and elongation re-
Annual Book of ASTM Standards, Vol 01.05.
4
Annual Book of ASTM Standards,Vol 14.02. quirements for material as described in Section 4 shall be met
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
A 704/A 704M – 01
when a specimen is tested across a point of weld. Weld shear 9. Rejection and Retests
strength requirements shall be in compliance with Se
...

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Standard Specification for Epoxy-Coated Steel Reinforcing Bars

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This specification covers deformed and plain steel reinforcing bars with protective epoxy coating applied by the electrostatic spray method. The surface of the steel reinforcing bars to be coated shall be cleaned by abrasive blast cleaning to near-white metal. The number and frequency of tests for coating thickness, continuity, flexibility and adhesion are specified. If the specimen for coating thickness or flexibility fails to meet the specified requirements, two retests on random samples shall be conducted for each failed test.
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1.1 This specification covers deformed and plain steel reinforcing bars with protective epoxy coating applied by the electrostatic spray method.
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1.2 Other organic coatings may be used provided they meet the requirements of this specification.  
1.3 Requirements for coatings are contained in Annex A1.  
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1.1 This specification covers deformed and plain carbon-steel bars in cut lengths and coils for concrete reinforcement. Annex A2 of this specification covers deformed bars for use for other applications. Steel bars containing alloy additions, such as with the Association for Iron and Steel Technology and the Society of Automotive Engineers series of alloy steels, are permitted if the resulting product meets all the other requirements of this specification. The standard sizes and dimensions of deformed bars and their number designations are given in Table 1.    
1.2 Unless specified for use for other applications in Annex A2, bars are of four minimum yield strength levels: namely, 40 000 psi [280 MPa], 60 000 psi [420 MPa], 80 000 psi [550 MPa], and 100 000 psi [690 MPa], designated as Grade 40 [280], Grade 60 [420], Grade 80 [550], and Grade 100 [690], respectively.
Note 1: Grade 100 [690] reinforcing bars were introduced in this specification in 2015. In contrast to the lower grades, which have ratios of specified tensile strength to specified yield strength that range from 1.25 to 1.50, Grade 100 [690] reinforcing bars have a ratio of specified tensile strength to specified yield strength of 1.15. Users of this specification should be aware that there will, therefore, be a lower margin of safety and reduced warning of failure following yielding when Grade 100 [690] bars are used in structural members where strength is governed by the tensile strength of the reinforcement, primarily in beams and slabs. As a result of the lower specified tensile strength to specified yield strength ratio of 1.15 for Grade 100 [690], users of this specification should be aware that ACI 318 Type 1 mechanical and welded splice requirements found in many acceptance criteria of 125 % of specified yield strength requirements in tension and compression are not applicable to Grade 100 [690]. Mechanical and welded splices should meet a minimum specified tensile strength of 115 000 psi [790 MPa] for Grade 100 [690].
Note 2: Users of this specification need to be aware that consensus design codes and specifications may not recognize the use of the No. 20 [64] bar, the largest bar included in this specification. Structural members reinforced with No. 20 [64] bars may require approval of the building official or other appropriate authority and require special detailing to ensure adequate performance at service and factored loads.  
1.3 Plain bars, in sizes up to and including 21/2 in. [63.5 mm] in diameter in coils or cut lengths, when ordered shall be furnished under this specification in Grade 40 [280], Grade 60 [420], Grade 80 [550], and Grade 100 [690]. For ductility properties (elongation and bending), test provisions of the nearest smaller nominal diameter deformed bar size shall apply. Requirements providing for deformations and marking shall not be applicable.  
Note 3: Welding of the material in this specification should be approached with caution since no specific provisions have been included to enhance its weldability. When this steel is to be welded, a welding procedure suitable for the chemical composition and intended use or service should be used. T...

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Standard Specification for Stress-Relieved Steel Wire for Prestressed Concrete

ABSTRACT
This specification covers two types of uncoated stress-relieved round high-carbon steel wire commonly used in prestressed linear concrete construction. These two types are the type BA used for applications in which cold-end deformation is used for anchoring purposes and type WA wire which is used for application in which the ends are anchored by wedges, no cold-end deformation of the wire is involved. Required tensile strength, yield strength, and elongation shall be evaluated using stress-relaxation test. Heat analysis shall be used to determine the percentage of specified elements especially sulfur and phosphorus to meet the required chemical composition.
SCOPE
1.1 This specification covers two types of stress-relieved round high-carbon steel wire used in prestressed concrete construction, as follows:  
1.1.1 Type BA wire is used for applications in which cold-end deformation is used for anchoring purposes (Button Anchorage), and  
1.1.2 Type WA wire is used for application in which the ends are anchored by wedges, and no cold-end deformation of the wire is involved (Wedge Anchorage).  
1.2 A supplementary requirement (S1) is provided for use where low-relaxation wire and relaxation testing for that product is required by the purchaser. The supplementary requirement applies only when specified in the purchase order or contract.  
1.3 This specification is applicable for orders in either inch-pounds units (as Specification A421) or in SI units (as Specification A421M).  
1.4 The values stated in either inch-pound 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 non-conformance with the specification.  
1.5 The text of this specification references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables) shall not be considered as requirements of the specification.  
1.6 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.

  • Technical specification
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  • Technical specification
    4 pages
    English language
    sale 15% off