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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Nominal head dimensions historically have called for gross head area to be ten asstm the bar area with the net bearing area of the head to be nine times the bar area.

Standard Specification for Headed Steel Bars for Concrete Reinforcement

Axtm comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Your basket is empty. Designers should be cognizant that the head sizes must be evaluated to ensure that adequate anchorage is provided, that the steel and concrete stresses are not excessive for the loadings, and that the detailing of the connection is consistent with the intended usage.

Referenced Documents purchase 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.

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 headed steel bars ensure that the speci? Work Item s – proposed revisions of this standard. Designers are cautioned to consult the speci? The test specimen shall be placed in ast, testing machine with the head supported to prevent movement and bending of the head.

The requirements of this speci? No nominal head dimensions are now provided in the speci?

Individual manufacturers will have to establish their own standards for the out-of-roundness that can be tolerated with their particular threading system. Note 1 This specification is applicable for headed bars produced with welded, threaded, or forged heads and used for reinforcement of concrete structures. The information should be traceable to speci? 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.

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Two specimens taken at random from the production lot shall be tested during a retest. The requirements of this specification are only applicable to headed bars where the attachment of the head is accomplished by one of a790 methods listed in 1. In either case the threads should be carefully adtm or rolled so that the engagement of the threads results in a uniform load in the head-to-bar connection.

It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the astj of regulatory limitations prior to use. Mechanical testing also shall be performed at intervals during production. Whereas, Class B headed steel bars ensure that the tensile strength of the actual bar is achieved along with the speci?

Active view current version of standard. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Material, manufacturing and testing requirements for the reinforcing bars shall be in accordance with other ASTM documents listed herein.

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

Head dimensions shall de? Frequency of Testing 7. Combining values from the two systems may result in nonconformance with the specification. This standard is subject to revision at any ast, by the responsible technical committee and must be reviewed every? Work Item s – proposed revisions of this standard.

ASTM A Headed Steel Bars锚固头钢筋标准_百度文库

Heads are forge formed, machined from bar asmt, or cut from plate. Class A and Class B. Where the welded head interferes with placement of the bend test a90, sufficient head material and any excess material associated with the welding process shall be removed along one edge of the reinforcing bar to provide a?

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A9970 standard applies only to headed bars with welded, threaded or forged heads. Current edition approved Oct. The faster, easier way to work with standards. The manufacturer shall furnish documentation to the purchaser, in the form of calculations or test reports, or both, that con? Click to learn more. Class A has been introduced for applications that only require the development of the minimum tensile strength of the reinforcing bar.

Note 1—This specification is applicable for headed bars produced with welded, threaded, or forged heads and used for reinforcement of concrete structures.

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. Originally approved in This specification covers deformed and plain steel reinforcing bars in cut lengths with a head attached to one or both ends for reinforcing concrete structures.

The centerline of the bend test mandrel shall be placed at the intersection of the reinforcing bar and the weld, as shown in Fig. Nominal head dimensions were previously provided to inform manufacturers of these systems as to typical head dimensions. The inch-pound units shall apply unless the “M” designation of this specification is specified in the order.

ASTM A/AM – 18 – Standard Specification for Headed Steel Bars for Concrete Reinforcement

A minimum of two tests shall be conducted during the production shift or period. This abstract is a brief summary of the referenced standard.

Link to Active This link will always route to the current Active version of the standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other.