ASTM 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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The inch-pound units shall apply unless the “M” designation of this specification is specified in astmm order. 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.

If the results of both test specimens meet the speci?

The information should be traceable to speci? Mechanical Test and Performance Requirements 6. 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.

ASTM A970/A970M – 18

Heads are forge formed, machined from bar stock, or cut from plate. 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. 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 values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. The requirements of this specification are not applicable to headed bars where the attachment of the head is accomplished by alternate means. We use cookies to make our website easier to use and to better understand your needs. Active view current version of standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other.

Standard Specification for Headed Steel Bars for Concrete Reinforcement

Link to Active This link will always route to the current Active version of the standard. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

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Aztm metallographic examination a9970 hardness survey should be carried out on a section of the head and welded or forged zone. Nominal head dimensions were previously provided to inform manufacturers of these systems as to typical head dimensions.

The head a790 be internally threaded so that it directly screws on the threaded bar end. This preparation shall ensure that the contact point of the bend mandrel is directly at the base of the reinforcing bar diameter as shown in Fig.

These testing requirements are designed to test both the preproduction headed bars as well as actual production products to verify that Class B head-to-bar connection is as strong as the parent head and bar materials and that the connection has sufficient ductility. The anchorage of the bar via the head provides the shortest tensile development length possible and essentially means that the headed bar is immediately anchored. Material and Manufacture 5. Attachment can asrm accomplished through welding, a9770 integrally hot forging of a head from the reinforcing bar end, by internal threads in the head aetm to threads on the bar end, or by a separate threaded nut to secure the head to the bar.

The requirements of this specification are not applicable to headed bars where the attachment of the head is accomplished by alternate means.

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

Originally approved in The tests shall be repeated for each combination of head and bar material speci? Bend testing of the large bar sizes is subject to agreement between asym and manufacturer.

The head dimensions found in editions prior to of 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. Class A and Class B. The requirements of this specification are not applicable to headed bars where the attachment of the head is accomplished by alternate means. This specification is applicable for headed bars produced with welded, threaded, or forged heads and used for reinforcement of concrete structures.

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During production tests of welded, forged, or threaded bars, if any tensile test specimen fails to not meet the requirements for tensile properties in 6. Note 1 This specification is applicable for headed bars produced with welded, threaded, or forged heads and used for reinforcement of concrete structures. Note 1 This specification is applicable for headed bars produced with welded, threaded, or forged heads and used for reinforcement of concrete structures. Class A headed steel bars ensure that the speci?

The values stated in each system are not exact equivalents; therefore, each system shall be used independently of the other.

Accept and continue Learn more about the cookies we use and how to change your settings. This standard applies only to headed bars with welded, threaded or forged heads. For machine straight threads, additional quality inspection of the reinforcing steel will be required to eliminate bars that may be excessively out of round.

The data on this in-process monitoring should be recorded and preserved by the manufacturer for a minimum of one year after manufacture of the welded headed bars.

This type of diagnostic examination should be conducted prior to continuous production for each combination of bar and head materials that will be produced.

Attachment can be accomplished through welding, by integrally hot forging of a head from the reinforcing bar end, 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.

Combining values from the two systems may result in non-conformance with the standard. Heads are forge-formed, machined from bar stock, or cut from plate.

Within the text, the SI units are shown in brackets. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

The test specimen shall be placed in z970 testing machine with the head supported to prevent movement and bending of the head.