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ASTM A779/A779M-16
Standard Specification for Steel Strand, Seven-Wire, Uncoated, Compacted for Prestressed Concrete
NORMA vydaná dňa 1.9.2016
Informácie o norme:
Označenie normy: ASTM A779/A779M-16
Dátum vydania normy: 1.9.2016
Kód tovaru: NS-650849
Počet strán: 4
Približná hmotnosť: 12 g (0.03 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Kategórie - podobné normy:
Anotácia textu normy ASTM A779/A779M-16 :
This specification covers seven-wire, uncoated, compacted, stress-relieved steel strand for prestressed concrete. The chemical requirements, mechanical requirements, and dimensions and permissible variations are presented. The mechanical requirement includes breaking strength, load at 1% extension and elongation. Different test method shall be performed on the strand that includes dimension test, breaking strength test, load at 1% extension test, elongation test and workmanship.
Keywords:
compacted strand (tendon), prestressed concrete, steel wire,, ICS Number Code 77.140.15 (Steels for reinforcement of concrete)
Doplňujúce informácie
| 1. Scope | ||||||||||
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1.1 This specification covers two types and three grades of compacted, seven-wire, uncoated strand for use in prestressed concrete construction. The two types of strand are low-relaxation and stress-relieved (normal-relaxation). The three grades are 245 [1700], 260 [1800] and 270 [1860]. 1.2 This specification is applicable for orders in either inch-pound units (as Specification A779) or in SI units (as Specification A779M). 1.3 The values stated in either inch-pound or SI units are to be regarded as standard. Within the text, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the specification. |
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| 2. Referenced Documents | ||||||||||
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