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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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. The chemical composition requirements of the bar for a forging operation are such that low-alloy steel or carbon steels can aatm used.

Class A headed steel bars ensure that the speci? ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date. In addition, the Structural Concrete Building Code Committee of the American Concrete Institute is currently working on developing design and detailing provisions for the use of headed bars in concrete structures.

Link to Active This link will always route to the adtm Active version of the standard. Your basket is empty. To achieve consistent performance of the attached head by welding, the bar material is limited to Speci? The head dimensions found in editions prior to of this speci?

Click to learn more. If the results of both test specimens meet the speci? Originally approved in The requirements in Annex A1 only apply when specified by the purchaser see 4. Class A has been introduced for applications that only require the development atsm the minimum tensile strength of the reinforcing bar.

For astmm headed bars or threaded headed bars, the reinforcing bars shall conform to Speci? A superscript epsilon e indicates an editorial change since the last revision or reapproval. The requirements of this speci? This specification is applicable for headed bars produced with welded, threaded, or forged heads and used for reinforcement of concrete structures. A number in parentheses indicates the year of last reapproval.

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ASTM A Headed Steel Bars锚固头钢筋标准_百度文库

No 9a70 head dimensions are now provided in the speci? This specification is applicable for headed bars produced with welded, q970, or forged heads and used for reinforcement of concrete structures. Mechanical Test and Performance Requirements 6. The faster, easier way to work with standards. Heads are forge formed, machined from bar stock, or cut from plate.

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.

Whereas, Class B headed steel bars ensure that the tensile strength of the actual bar is achieved along with the speci?

Standard Specification for Headed Steel Bars for Concrete Reinforcement

Bend testing of welded headed bars in sizes No. The requirements in Annex A1 only apply when specified by the purchaser see 4. Historical Version s – view previous versions of standard. Bend testing of astk large bar sizes is subject to agreement between purchaser and manufacturer.

Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Note 1 This aztm is applicable for headed bars produced with welded, threaded, or forged heads and used for reinforcement of concrete structures.

A9770 Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. In the axtm criteria, the failure of the head or the head-to-bar connection within the attachment region was cause for rejection. NOTE 4—The industry wstm Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system shall be used independently of the other.

Heads are forge formed, machined from bar stock, or cut from plate. Carbon-steel reinforcing bars, cold-extruded threaded headed reinforcing bars, cold-swaged coupling sleeve headed reinforcing bars, cold-swaged external asstm 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.

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Where the welded head interferes with placement of the bend test mandrel, 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?

The head dimensions provided in previous editions 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. The data on this in-process monitoring should be recorded adtm preserved by the manufacturer for a minimum of one year after manufacture of the welded headed bars.

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. The head may be internally threaded so that it directly screws on the threaded bar end.

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

September Replaced By: Material and Manufacture 5. 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.

The records to be maintained include, but are not limited to, certi? Two specimens taken at random from the production lot shall be tested during a retest. Note 1 This specification is applicable for headed bars produced with welded, threaded, or forged heads and used for reinforcement of concrete structures. Failure mode shall be reported as partial or total fracture of the a790, the head, or the head-to-bar connection. The manufacturer shall afford the inspector reasonable access to the facilities to satisfy the inspector that the materials and aa970 are in accordance with this speci?

Work Item s – proposed revisions of this standard.

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