ASTM A970 PDFASTM A970 PDF

A/AM – 07 Standard Specification for Headed Steel Bars for Concrete Reinforcement, carbon-steel reinforcing bars, concrete reinforcement. ASTM A Headed Steel Bars锚固头钢筋标准_自然科学_专业资料。Designation : A /A M – 07 Standard Speci?cation for Headed Steel. Terminator headed bar systems comply with the requirements of , and editions of ASTM A Class A. • The D6, D14, and D16 families of.

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Whereas, Class B headed steel bars ensure that the tensile strength of the a790 bar is achieved along with the speci? The requirements of this specification are only applicable to headed bars where the attachment of the head is accomplished by one of the methods listed in 1. Combining values from the two systems may result in nonconformance with the specification.

ASTM A / AM – 07 Standard Specification for Headed Steel Bars for Concrete Reinforcement

Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. This standard applies only to headed bars with welded, threaded or forged heads. Link to Active This link will always route to the current Active version of the standard. Heads are forge formed, machined from bar stock, or cut from plate. Note 1—This specification is applicable for headed bars produced with welded, threaded, or forged heads and used for reinforcement of concrete structures.

The opposite bar end of the bar, without a head attached, shall be gripped by the testing machine and loaded to failure.

The other option is for the head to have a non-threaded hole so that the head is held on the bar end by a nut and a counternut. The minimum length of the test specimen shall be the greater of mm [10 in. Link to Active This link will always route to the current Active version of the standard.

One test at the start and one test at the end of each 8-h shift or less than 8-h production period or at random intervals during the production period shall be conducted. This standard does not purport to address all of the safety concerns, if any, associated with its use.

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The requirements of this specification are not applicable to headed bars where the attachment of the head is accomplished by alternate means. Thus, integrally forged headed bars are allowed to use a90 Speci? We use cookies to make our website easier asfm use and to better understand your needs. Carbon-steel reinforcing bars, cold-extruded threaded headed reinforcing bars, cold-swaged coupling sleeve headed reinforcing bars, cold-swaged external sleeve headed reinforcing bars, cold-swaged headed sleeve reinforcing bars, concrete reinforcement, deformations protrusionsferrous-filled headed reinforcing bars, headed reinforcement, headed reinforcing bars, integrally-forged headed reinforcing bars, low-alloy steel reinforcing bars, threaded headed reinforcing bars, welded headed reinforcing bars.

The information obtained can be essential in eliminating problems with strength a90 ductility of the welded or forged head-to-bar connection, or both.

You may find similar items within these categories by selecting from the choices below:. It is the responsibility of the user of this standard to establish appropriate safety and s970 practices and determine the applicability of regulatory limitations prior to use.

Combining values from the astn systems may result in non-conformance with the standard. Work Item s – proposed revisions of this standard. A number in parentheses indicates the year of last reapproval. Link to Active This link will always route to the current Active version of the standard.

Standard Specification for Headed Steel Bars for Concrete Reinforcement

The chemical composition requirements of the bar for a forging operation are such that low-alloy steel or carbon steels can be used. Search all products by. The head shall either thread onto the bar directly, or it shall be held on ast, bar end by a nut and counternut.

Note 1 This specification is applicable for headed bars produced with welded, threaded, or forged heads and used for reinforcement of concrete structures. For machine straight threads, additional quality inspection of the reinforcing steel will xstm required to eliminate bars that may be excessively out of round. Referenced Documents s970 separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Mechanical Test and Performance Requirements 6. Frequency of Testing 7.

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The head may be internally threaded so that it directly screws on the threaded bar end. This type of ashm examination should be conducted prior to continuous production for each combination of bar and head materials that will be produced.

Heads are forge formed, machined from bar stock, or cut from plate. Work Item s – proposed revisions of this standard. The manufacturer shall afford the inspector ashm access to the facilities to satisfy the inspector that the materials and procedures are in accordance with this speci? Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

Find Similar Items This product falls into the following categories. In either case the threads should be carefully cut or rolled so that the engagement of the threads results in a uniform load in the head-to-bar connection.

The records to be maintained include, but are not limited to, certi? These rules will provide designers with appropriate guidance for the design of structures using headed reinforcing bars so that the anchorages remain ductile, even under earthquake loading.

Historical Version s – view previous versions of standard. Combining values from the two systems may result in non-conformance with the aastm.

Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. In the previous criteria, the failure of the head or the head-to-bar connection within the attachment region was cause for rejection. Attachment can be accomplished through welding or forging of heads onto the bar ends, by internal threads in the head mating to threads on the bar end or by a separate threaded nut to secure the head to the bar.

The centerline of the bend test mandrel shall be placed at the intersection of the reinforcing bar and the weld, as shown in Fig. This specification is applicable for headed bars produced with welded, threaded, z970 forged heads and used for reinforcement of concrete structures.