Standard Specification for Low-Relaxation, Seven-Wire Steel Strand for Prestressed Concrete
NORMA vydaná dňa 1.3.2024
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Designation standards: ASTM A416/A416M-24
Publication date standards: 1.3.2024
The number of pages: 5
Approximate weight : 15 g (0.03 lbs)
Country: American technical standard
Kategória: Technické normy ASTM
This specification deals with the standard types and grade requirements of seven-wire, uncoated steel strands for use in the construction of pre-tensioned and post-tensioned pre-stressed concrete. The two types of strand are low-relaxation and stress-relieved (normal relaxation). The base metal shall be made of carbon steel and shall undergo stranding and continuous thermal and mechanical treatment. Mechanical testing methods shall be performed to determine the breaking strength, yield strength, elongation, and stress relaxation properties wherein the strand shall conform to the required mechanical attributes of the product. Final products shall be furnished on reels or in reelless packs for packaging and marked with two strong tags for identification. The requirements specified herein shall also be applicable for pre-stressed ground anchor construction.
Keywords:
prestressed concrete, seven-wire strand (tendon), steel wire,, ICS Number Code 77.140.15 (Steels for reinforcement of concrete)