ASTM A951-00
(Specification)Standard Specification for Masonry Joint Reinforcement
Standard Specification for Masonry Joint Reinforcement
SCOPE
1.1 This specification covers masonry joint reinforcement fabricated from cold drawn steel wire. Joint reinforcement consists of longitudinal wires welded to cross wires.
1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: A 951 – 00
Standard Specification for
Masonry Joint Reinforcement
This standard is issued under the fixed designation A 951; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
A 82–_______, hot-dip galvanized to ASTM A 153 – _______, conform-
1. Scope
ing to ASTM A 951 – _______.
1.1 This specification covers masonry joint reinforcement
fabricated from cold drawn steel wire. Joint reinforcement
4. Materials and Manufacture
consists of longitudinal wires welded to cross wires.
4.1 Wire used in the manufacture of masonry joint rein-
1.2 The values stated in inch-pound units are to be regarded
forcement shall be round and shaped and conform to the
as the standard. The values given in parentheses are for
applicable provisions of Specification A 82 or A 580, Type
information only.
304, except as modified herein.
4.2 Masonry joint reinforcement shall be assembled by
2. Referenced Documents
automatic machines or by other suitable mechanical means that
2.1 ASTM Standards:
will assure accurate spacing and alignment of all members of
A 82 Specification for Steel Wire, Plain, for Concrete Re-
the finished product.
inforcement
4.3 Longitudinal and cross wires shall be securely con-
A 153/A 153M Specification for Zinc Coating (Hot-Dip) on
nected at every intersection by an electric-resistance welding
Iron and Steel Hardware
process that includes both fusion welding together with applied
A 185 Specification for Steel Welded Wire Fabric, Plain, for
pressure to join the materials.
Concrete Reinforcement
4.4 Longitudinal wires shall be deformed. One set of two
A 496 Specification for Steel Wire, Deformed, for Concrete
deformations shall occur around the perimeter of the wire at a
Reinforcement
maximum spacing of 0.7 times the diameter or width of the
A 580/A 580M Specification for Stainless and Heat-
wire, but not less than eight sets per inch (25 mm) of length.
Resisting Steel Wire
NOTE 2—Wire used for joint reinforcement is knurled to form defor-
A 641/A 641M Specification for Zinc-Coated (Galvanized)
mations and as such it does not come under the deformation requirements
Carbon Steel Wire
in Specification A 496.
3. Ordering Information
5. Mechanical Requirements
3.1 Orders for material to this specification should include
5.1 Tensile Properties—Wire used in the fabrication of
the following information:
masonry joint reinforcement shall conform to the requirements
3.1.1 Quantity (linear feet) (metres),
of Table 1 based on nominal area of the wire.
3.1.2 Type (truss, ladder),
5.2 Tension Tests:
3.1.3 Width (nominal thickness of masonry wall),
5.2.1 Tension tests shall be made on individual wires cut
3.1.4 Wire size and wire specification,
from the finished product and tested either across or between
3.1.5 Finish (see Section 6),
the welds. No less than 50 % shall be across welds.
3.1.6 Packaging (see Section 12), and
5.2.2 Tension tests across a weld shall have the welded joint
3.1.7 ASTM designation number and year of issue.
located approximately at the center of the wire being tested.
NOTE 1—A typical ordering description is as follows:
5.2.3 Tensile strength shall be the average of four test values
10 000 ft joint reinforcement, No. 8 standard (W1.7) truss, wire to ASTM
determined by dividing the maximum test load by the specified
nominal cross-sectional area of the wire.
5.3 Reduction of Area—The ruptured section of the tensile
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
specimen is measured to determine this property. The measure-
Stainless Steel, and Related Alloys and is the direct responsibility of Subcommittee
A01.05 on Steel Reinforcement.
ment shall be made only when rupture has occurred at a
Current edition approved Sept. 10, 2000. Published October 2000. Originally
sufficient distance from the center of the weld to permit an
published as A 951 – 96. Last previous edition A 951 – 98.
2 accurate measurement of the fractured section. Additional
Annual Book of ASTM Standards, Vol 01.04.
testing is permitted when a suitable ruptured section is not
Annual Book of ASTM Standards, Vol 01.06.
Annual Book of ASTM Standards, Vol 01.03.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
A951–00
TABLE 1 Tension Test Requirements
7.3 Width—The width of joint reinforcement is defined as
Tensile strength, min, ksi (MPa) 80 the out-to-out distance of outside longitudinal wires. Width
(550) 1
shall not vary by more than ⁄8 in. (3 mm) from the manufac-
Yield strength, min, ksi (MPa) 70
turer’s specified standard dimension. Width shall be measured
(485)
Reduction of area, min, % 30 as follows:
7.3.1 Ladder Type Joint Reinforcement— At opposite weld
points, and
7.3.2 Truss Type Joint Reinforcement— From a weld point
obtained from the initial test. The wire shall meet the minimum
on one longitudinal wire perpendicular to a point on the
reduction of area requirements of Table 1.
opposite wire between adjacent weld points.
5.4 Weld Shear Strength—The least weld shear strength in
7.4 Length—The length of pieces of joint reinforcement
pounds-force shall be not less than 25 000 multiplied by the
shall not vary by more than ⁄2 in. (13 mm) from the specified
specified nominal area of the larger wire in square inches (or in
length.
Newtons shall not be less than 172 multiplied by the nominal
7.5 Dimensions:
area in square millimetres).
7.5.1 The required dimensions shall be measured on three
NOTE 3—Since industry practice is to use butt welds in the manufacture samples of joint reinforcement prior to galvanizing or on three
of joint reinforcement, the weld shear strength in pounds-force is
samples from which the galvanizing has been removed.
prescribed as 25 000 times the area of the larger wire rather than 35 000
7.5.2 Measure the dimensions of both longitudinal and cross
times the area of the larger wire.
wires to the nearest 0.001 in. (0.03 mm).
5.5 Weld Shear Strength Tests:
7.5.3 Measure the gaps between the ends of deformations
5.5.1 Test specimens shall be obtained from the finished around the circumference of the wire to the nearest 0.001 in.
product by cutting a section of longitudinal wire that includes
(0.03 mm).
one weld.
5.5.2 Weld shear strength tests shall be conducted using a
8. Number of Tests
fixture of such design as to prevent rotation of the cross wire.
8.1 Number of Tests—One set of each test described herein
The cross wire shall be placed in the anvil of the testing device
shall be performed for each 300 000 linear feet (91 500 m) of
which is secured in the tensile machine and the load then
joint reinforcement, but not less than one set each week.
applied to the longitudinal wire.
5.5.3 Weld shear strength shall be the average test load in
9. Inspection
pounds (Newtons) of four test specimens selected at random.
9.1 The inspector representing the purchaser shall have free
5.6 Bend Tests:
entry at all times, while work on the contract of the purchaser
5.6.1 Test specimens shall be obtained from the fabricated
is being performed, to all parts of the manufacturer’s works
product by cutting a section of longitudinal wire without welds.
that concern the manufacture of the material ordered. The
5.6.2 The test specimens shall be bent at room temperature
manufacturer shall afford the inspector all reasonable facilities
through 180° around a pin, the diameter of which is equal to
to assure that the material is being furnished in accordance with
the nominal diameter of the specified wire. Shaped wires shall
this specification.
be placed on the pin so that the minimum dimension is
9.2 Except for yield strength, all tests and inspections shall
perpendicular to the axis of the pin.
be made at the place of manufacture prior to shipment, unless
5.6.3 The specimen shall not break nor shall there be visible
otherwise specified. Such tests shall be conducted so as not to
cracks of the base metal on the outside diameter of the bend.
interfere unnecessarily with the operation of the works.
9.3 If the purchaser considers it desirable to determine
6. Other Requirements
compliance with the strength requirements of Specification
6.1 When corrosion protection of joint reinforcement is
A 82, tension tests shall be made by a recognized laboratory, or
provided, it shall be in accordance with one of the following:
by the wire supplier, observed by the purchaser’s representa-
6.1.1 Mill Galvanized—Zinc coated, in accordance with the
tive if desired, provided such tests do not interfere unneces-
hot-dip method of Specification A 641, with a minimum of 0.1
2 sarily with the mill operations.
oz of zinc per square foot (30 g/m ) of surface ar
...
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