Cookies
Potřebujeme váš souhlas k využití jednotlivých dat, aby se vám mimo jiné mohly ukazovat informace týkající se vašich zájmů. Souhlas udělíte kliknutím na tlačítko „OK“.
ASTM A615/A615M-15a
Standard Specification for Deformed and Plain Carbon-Steel Bars for Concrete Reinforcement (Includes all amendments And changes 12/7/2015).
Automaticky přeložený název:
Standardní specifikace pro deformované a Plain Carbon - ocelové tyče pro vyztužení betonu
NORMA vydána dne 1.7.2015
Informace o normě:
Označení normy: ASTM A615/A615M-15a
Poznámka: NEPLATNÁ
Datum vydání normy: 1.7.2015
Kód zboží: NS-613216
Počet stran: 8
Přibližná hmotnost: 24 g (0.05 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Anotace textu normy ASTM A615/A615M-15a :
Keywords:
concrete reinforcement, deformations (protrusions), steel bars,, ICS Number Code 77.140.15 (Steels for reinforcement of concrete)
Doplňující informace
| 1. Scope | ||||||||||||||||||||||
|
1.1 This specification covers deformed and plain carbon-steel bars in cut lengths and coils for concrete reinforcement. Steel bars containing alloy additions, such as with the Association for Iron and Steel Technology and the Society of Automotive Engineers series of alloy steels, are permitted if the resulting product meets all the other requirements of this specification. The standard sizes and dimensions of deformed bars and their number designations are given in Table 1. 1.2 Bars are of five minimum yield
strength levels: namely, 40 000 psi [280 MPa], 60 000 psi [420
MPa], 75 000 psi [520 MPa], 80 000 psi [550 MPa], and 100 000 psi
[690 MPa], designated as Grade 40 [280], Grade 60 [420], Grade 75
[520], Grade 80 [550], and Grade 100 [690], respectively.
Note 1: Grade 100 [690] reinforcing bars were introduced in
this specification in 2015. In contrast to the lower grades, which
have ratios of specified tensile strength to specified yield
strength that range from 1.31 to 1.5, Grade 100 [690] reinforcing
bars have a ratio of specified tensile strength to specified yield
strength of 1.15. Designers should be aware that there will,
therefore, be a lower margin of safety and reduced warning of
failure following yielding when Grade 100 [690] bars are used in
structural members where strength is governed by the tensile
strength of the reinforcement, primarily in beams and slabs. If
this is of concern, the purchaser has the option of specifying a
minimum ratio of tensile strength to actual yield strength.
Consensus design codes and specifications such as “Building Code
Requirements for Structural Concrete (ACI 318)” may not recognize
Grade 100 [690] reinforcing bars: therefore the 125 % of specified
yield strength requirements in tension and compression are not
applicable. Mechanical and welded splices should meet a minimum
specified tensile strength of 115 000 psi [790 MPa].
Note 2: Designers need to be aware that design standards do
not recognize the use of the No. 20 [64] bar, the largest bar
included in this specification. Structural members reinforced with
No. 20 [64] bars may require approval of the building official or
other appropriate authority and require special detailing to ensure
adequate performance at service and factored loads.
1.3 Plain bars, in sizes up to and including 21/2 in. [63.5 mm] in diameter in coils or cut lengths, when ordered shall be furnished under this specification in Grade 40 [280], Grade 60 [420], Grade 75 [520], Grade 80 [550], and Grade 100 [690]. For ductility properties (elongation and bending), test provisions of the nearest smaller nominal diameter deformed bar size shall apply. Requirements providing for deformations and marking shall not be applicable. Note 3: Welding of the material in this specification should
be approached with caution since no specific provisions have been
included to enhance its weldability. When this steel is to be
welded, a welding procedure suitable for the chemical composition
and intended use or service should be used. The use of the latest
edition of AWS D1.4/D1.4M is recommended. The AWS D1.4/D1.4M
Welding Code describes the proper selection of the filler metals
and preheat/interpass temperatures, as well as performance and
procedure qualification requirements.
1.4 Requirements for alternate bar sizes are presented in Annex A1. The requirements in Annex A1 only apply when specified by the purchaser (see 4.2.4). 1.5 The text of this specification references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables) shall not be considered as requirements of the specification. 1.6 This specification is applicable for orders in either inch-pound units (as Specification A615) or in SI units (as Specification A615M). 1.7 The values stated in either inch-pound units or SI units are to be regarded separately 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. 1.8 This specification does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this specification to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. |
||||||||||||||||||||||
| 2. Referenced Documents | ||||||||||||||||||||||
|
Doporučujeme:
