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 type of diagnostic examination should be conducted prior to continuous production for each combination of bar and head materials that will be produced.
ASTM A / AM – 06 Standard Specification for Headed Steel Bars for Concrete Reinforcement
In case of dissatisfaction with the results of the test, the manufacturer shall make claim for a rehearing within wstm time. A minimum of two tests shall be conducted during the production shift or period.
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. Current edition approved Oct.
Material, manufacturing and testing requirements for the reinforcing bars shall be in accordance with other ASTM documents listed herein.
The requirements in Annex A1 only apply when specified by the purchaser asttm 4. Combining values from the two systems may result in non-conformance with the specification. The centerline of the bend test mandrel shall be placed at the intersection of the reinforcing bar and the weld, as shown in Fig.
ASTM A970/A970M – 18
Designers, purchasers, and manufacturers who have no other information regarding head proportioning may refer to these dimensions as a starting point. The requirements of this specification are not applicable to headed bars where the attachment of the head is accomplished by alternate means. The information obtained can be essential in eliminating problems with strength or ductility of q970 welded or forged head-to-bar connection, or both.
Designers are cautioned to consult the speci? Nominal head dimensions were previously provided to inform manufacturers of these systems as to typical head dimensions. Combining values from the two systems may result in nonconformance with the specification.
This specification is applicable for headed bars produced with welded, threaded, or forged heads and used for reinforcement of concrete structures.
The requirements in Annex A1 only apply when specified by the purchaser see 4. This website is best viewed with browser version of up to Microsoft Internet Explorer 8 or Firefox 3. Nominal head dimensions historically have called for gross head area to be ten times the bar area with the net bearing area of the head to be nine times the bar area.
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.
Class A headed steel bars ensure that the speci? The manufacturer shall afford the inspector reasonable access to the facilities to satisfy the inspector that the materials asstm procedures are in accordance with this speci?
You may find similar items within these categories by selecting from the choices below:. The opposite bar end of the bar, without a head attached, shall be gripped by the testing machine and loaded to failure. No nominal head dimensions are now provided in the speci? NOTE 4—The industry de? Class A has been introduced for applications that only require the development of the minimum tensile strength of the reinforcing bar. 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?
It is the responsibility of the user of this standard to establish appropriate asfm and health practices and determine the aa970 of regulatory limitations prior to use. Combining values from the two aatm may result in non-conformance with the standard. For machine straight threads, additional quality inspection of the reinforcing steel will be required to eliminate bars that may be excessively out of round.
Frequency of Testing 7. The head may be internally threaded so that it directly screws on the threaded bar end. The inch-pound units shall apply unless the “M” designation of this specification is specified in the order.
Accept and continue Learn more about the cookies we use and how to change your settings. 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. Attachment can be accomplished through:. 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.
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. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.