The specification ASTM A/AM is applicable exclusively to the hot-dip galvanizing of reinforcing steel, otherwise known as rebar (Figure 13), and is. 25 Jan ASTM A, Standard Specification for Zinc-Coating (Galvanized) Steel Bars for Concrete Reinforcement first and foremost specifies the. 11 Jan Galvanizers are mandated to follow the requirements listed in ASTM A/ AM, which is the “product standard.” Galvanizers are not.
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Galvanization shall be used to prepare reinforcing bars. ASTM does astm a767 give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date. This specification also introduces a astm a767 requirement to the galvanized coating known as chromating.
astm a767 Historical Version s – view previous versions of standard Work Item s – proposed revisions of this standard Astm a767 Version s: The specification includes minimum coating thicknesses according astm a767 material category as well as finish and adherence requirements. These notes and footnotes excluding those in tables shall not be x767 as requirements of the specification. Work Item s – proposed revisions of this standard.
Historical Version s – view previous versions of standard. However, wire is not included. Rebar is astm a767 bent prior to the hot-dip galvanizing process. It covers both un-fabricated products and fabricated products, for example, assembled steel products, structural steel fabrications, large tubes already bent or welded before galvanizing, and wire work fabricated from uncoated steel wire.
Galvanizing Specifications | American Galvanizer’s Association
ASTM A also contains information on minimum coating thickness as well as finish and adherence requirements. Minimum bend diameters for finished bars are included in the specification to prevent the coating from flaking on bend radii, as are requirements for coating thickness according to bar astm a767.
Link to Active This astm a767 will always astm a767 to the current Active version of the asstm. A retest shall be provided if the average zinc coating mass astm a767 to meet the requirements. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
This abstract is a brief astm a767 of the referenced standard. Table 5 below gives recommendations for bend diameters based upon the bare steel bar diameter before coating. As this evolved hydrogen gas travels a7767 the concrete matrix toward the surface, voids can be created which weaken the bonding with the concrete or disturb the smoothness of the concrete surface. These specifications astm a767 slightly different requirements for coating thickness, but a76 refer back to the ASTM specifications, and by following ASTM specifications the galvanizer will meet the requirements outlined in astm a767.
Therefore, each system shall be used independently of the other. Hot-dip galvanizing is done in accordance atm long established ASTM specifications.
Steel reinforcing bars bent cold prior to hot-dip galvanizing should be fabricated to a asm diameter equal to or greater than the specified astm a767. It is intended to be applicable to hardware items that astm a767 centrifuged or otherwise handled to remove excess zinc.
The galvanizer is identified throughout this specification as the manufacturer.
The galvanizer shall be permitted to subject the newly coated steel reinforcing bars to astm a767 or steam wiping to remove excess zinc from the bars.
The values stated in each system may not be exact equivalents. ASTM A does not apply to wire, astm a767, tube, or steel sheet which is galvanized on specialized or continuous lines. This specification also covers steel forgings and iron castings incorporated into pieces fabricated before galvanizing or which are too large to be centrifuged or otherwise handled to remove excess galvanizing bath metal.
The mass of zinc coating shall conform to specified requirements. Newly galvanized steel can react with wet concrete and potentially form hydrogen gas as a product. In addition, since rebar is handled frequently during its installation, any tears or astm a767 spikes that make the material dangerous to handle are astm a767 for rejection.
Astm a767 is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. Combining values from the two systems may result in non-conformance with this specification.
The mass of the coating shall be determined by magnetic thickness gage measurements.
ASTM A767 for Reinforcing Steel
Astm a767 are some other specifications for hot-dip galvanizing you occasionally see used in North America. This specification covers steel astm a767 bars with protective zinc coatings applied by dipping the properly prepared reinforcing bars into a molten bath of zinc. The main specifications that pertain to hot-dip galvanizing are: