Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: AASHTO M 221M/M 221:2009
• Năm ban hành / Publication date: 2009
• Tình trạng / Status: W - Hết hiệu lực
• Tên tiếng Anh / Title in English: Standard Specification for Steel Welded Wire Reinforcement, Deformed, for Concrete
• Thay thế cho / Replace: AASHTO M 221M/M 221:2005
• Số trang / Page: 2

Phạm vi áp dụng / Scope of standard

This specification covers welded wire reinforcement made from
cold-worked drawn or rolled deformed wire, or a combination of
deformed and nondeformed wires, to be used for the reinforcement of
concrete.

Note 1-Welded wire for concrete reinforcement
has been described by various terms: welded wire fabric (WWF),
fabric, and mesh. The wire reinforcement industry prefers the term
"welded wire reinforcement" (WWR) as being more representative of
the range of products being manufactured. Therefore, the term
"welded wire fabric" has been replaced with the term "welded wire
reinforcement" in this specification and in related
specifications. 

This specification is applicable for orders in either SI units
(M 221M) or in inch-pound units (M 221). SI units and inch-pound
units are not necessarily equivalent. Inch-pound units are shown in
brackets in the text for clarity, but they are the applicable
values when the material is ordered to M 221. Combining values from
the two systems may result in nonconformance with the standard.