ASTM B746/B746M-22e1

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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Designation: B746/B746M − 22
Standard Specification for
Corrugated Aluminum Alloy Structural Plate for Field-Bolted
Pipe, Pipe-Arches, and Arches
This standard is issued under the fixed designation B746/B746M; 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 (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
ε NOTE—Editorially updated references in Section 2 in October 2023.
1. Scope mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
1.1 This specification covers corrugated aluminum alloy
structural plate used in the construction of pipe, pipe-arches,
2. Referenced Documents
arches, underpasses, box culverts, and special shapes for field
2.1 ASTM Standards:
assembly. Appropriate fasteners are also described. The pipe,
A153/A153M Specification for Zinc Coating (Hot-Dip) on
arches, and other shapes are generally used for drainage
Iron and Steel Hardware
purposes, pedestrian and vehicular underpasses, and utility
A307 Specification for Carbon Steel Bolts, Studs, and
tunnels. Aluminum box culvert shapes are covered in Specifi-
Threaded Rod 60 000 PSI Tensile Strength
cation B864/B864M.
A449 Specification for Hex Cap Screws, Bolts and Studs,
1.2 This specification does not include requirements for
Steel, Heat Treated, 120/105/90 ksi Minimum Tensile
bedding, backfill, or the relationship between earth cover load
Strength, General Use
and plate thickness of the pipe. Experience has shown that the
A563/A563M Specification for Carbon and Alloy Steel Nuts
successful performance of this product depends upon the
(Inch and Metric)
proper selection of plate thickness, type of bedding and
A930 Practice for Life-Cycle Cost Analysis of Corrugated
backfill, controlled manufacture in the plant, and care in the
Metal Pipe Used for Culverts, Storm Sewers, and Other
installation. The purchaser must correlate the above factors and
Buried Conduits
also the corrosion and abrasion requirements of the field
B209/B209M Specification for Aluminum and Aluminum-
installation with the plate thickness. The structural design of
Alloy Sheet and Plate
corrugated aluminum structural plate pipe and the proper
B221 Specification for Aluminum and Aluminum-Alloy Ex-
installation procedures are given in Practices B790/B790M and
truded Bars, Rods, Wire, Profiles, and Tubes
B789/B789M, respectively. A procedure for using life-cycle
B221M Specification for Aluminum and Aluminum-Alloy
cost analysis techniques to evaluate alternate drainage system
Extruded Bars, Rods, Wire, Profiles, and Tubes (Metric)
designs using corrugated metal pipe is given in Practice A930.
B666/B666M Practice for Identification Marking of Alumi-
1.3 The values stated in either inch-pound units or SI units
num and Magnesium Products
are to be regarded separately as standard. The values stated in
B695 Specification for Coatings of Zinc Mechanically De-
each system are not exact equivalents; therefore, each system
posited on Iron and Steel
shall be used independently of the other.
B789/B789M Practice for Installing Corrugated Aluminum
Structural Plate Pipe for Culverts and Sewers
1.4 This international standard was developed in accor-
B790/B790M Practice for Structural Design of Corrugated
dance with internationally recognized principles on standard-
Aluminum Pipe, Pipe-Arches, and Arches for Culverts,
ization established in the Decision on Principles for the
Storm Sewers, and Other Buried Conduits
Development of International Standards, Guides and Recom-
B864/B864M Specification for Corrugated Aluminum Box
Culverts
This specification is under the jurisdiction of ASTM Committee B07 on Light
Metals and Alloys and is the direct responsibility of Subcommittee B07.08 on
Corrugated Aluminum Pipe and Corrugated Aluminum Structural Plate. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved May 1, 2022. Published May 2022. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1989. Last previous edition approved in 2016 as B746/B746M – 16. Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/B0746_B0746M-22E01. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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B746/B746M − 22
E29 Practice for Using Significant Digits in Test Data to 3.1.11 special shape, n—a shape, other than described
Determine Conformance with Specifications elsewhere in this section, suitable for fabrication with struc-
F467 Specification for Nonferrous Nuts for General Use tural plate.
F467M Specification for Nonferrous Nuts for General Use
3.1.12 structural plate, n—a corrugated and curved plate
(Metric)
which is field assembled with other structural plates to form the
F468 Specification for Nonferrous Bolts, Hex Cap Screws,
required structure.
Socket Head Cap Screws, and Studs for General Use
3.1.13 supplier, n—the seller of the finished product when
F468M Specification for Nonferrous Bolts, Hex Cap Screws,
other than the fabricator.
and Studs for General Use (Metric)
3.1.14 vehicular underpass, n—a high arch shape with an
F568M Specification for Carbon and Alloy Steel Externally
approximate semicircular crown, large-radius sides, small-
Threaded Metric Fasteners (Metric) (Withdrawn 2012)
radius corners between sides and invert, and large-radius
F593 Specification for Stainless Steel Bolts, Hex Cap
invert.
Screws, and Studs
F594 Specification for Stainless Steel Nuts
4. Ordering Information
F738M Specification for Stainless Steel Metric Bolts,
4.1 Orders for material under this specification shall include
Screws, and Studs (Withdrawn 2014)
the following information as necessary to adequately describe
F836M Specification for Style 1 Stainless Steel Metric Nuts
the desired product:
(Metric)
4.1.1 Name of material (aluminum alloy structural plate and
2.2 American National Standards:
accessories),
B18.2.1 Square and Hex Bolts and Screws, Inch Series
4.1.2 Description of structure (see Section 3),
B18.2.2 Square and Hex Nuts
4.1.3 Number of structures,
B18.2.3.6M Bolts, Metric, Heavy Hex
4.1.4 ASTM designation and year of issue, as B746–___ for
B18.2.4.6M Hex Nuts, Heavy, Metric
inch-pound units or B746M–___ for SI units,
4.1.5 Dimensions of structure (diameter or span and rise,
3. Terminology
and length, and so forth) (see 7.2),
3.1 Definitions of Terms Specific to This Standard:
4.1.6 Thickness of plate (see 7.1),
3.1.1 arch, n—a part circle shape spanning an open invert
4.1.7 Type of bolts; whether aluminum, stainless steel, or
between the footings on which it rests.
steel bolts are required or permitted. If not specified, steel bolts
and nuts shall be furnished (see 5.3 and Note 2),
3.1.2 box culvert, n—a rectangular box with short-radius in
4.1.8 End treatment (bevel, skew, grade or slope
upper corners and a long-radius crown. It can be with full
corrections, or other special provision if required by the project
invert or with footing pads.
plans or specifications),
3.1.3 fabricator, n—the producer of the components for the
4.1.9 Special requirements (including extrusion reinforce-
finished product.
ment locations and shapes), if required, and
3.1.4 flat plate, n—sheet or plate used to fabricate structural
4.1.10 Certification, if required.
plate.
NOTE 1—Typical ordering descriptions are as follows: (1) Structural
3.1.5 manufacturer, n—the producer of the flat plate and
plates and fasteners for two aluminum alloy structural plate pipes, in
accessories.
accordance with ASTM B746–___, 180-in. dia., 0.100-in. plate thickness,
each 140-ft nominal centerline length with end treatment as shown on
3.1.6 pipe, n—a conduit having full circular shape; also, in
plans. (2) Structural plates and fasteners for one aluminum alloy structural
a general context, all structure shapes covered by this specifi-
plate pipe arch, in accordance with ASTM B746–___, 3860 mm span by
cation.
2460 mm rise, 3.81 mm plate thickness, 27.0 m nominal centerline length
with square ends.
3.1.7 pipe-arch, n—an arch shape with an approximate
semicircular crown, small-radius corners, and large-radius
5. Materials
invert.
5.1 Flat Plate—Insofar as applicable, flat plate shall con-
3.1.8 pipe, horizontal ellipse, n—an elliptically shaped pipe
form to the requirements of Specification B209/B209M. The
with the horizontal diameter approximately 20 % greater than
plates shall be fabricated from alloy 5052-H141. The mechani-
the nominal diameter.
cal properties for alloy 5052-H141 shall conform to the
3.1.9 pipe, vertically elongated, n—an elliptically shaped
requirements of Table 1.
pipe with the vertical diameter up to 10 % greater than the
5.2 Extrusions—The extrusions for circumferential or lon-
nominal diameter.
gitudinal stiffeners, or secondary structural components, shall
3.1.10 purchaser, n—the purchaser of the finished product.
be fabricated from aluminum alloys 6061-T6 or 6063-T6
conforming to Specification B221 or B221M.
5.3 Assembly Fasteners—Except as provided elsewhere in
The last approved version of this historical standard is referenced on
this section, bolts and nuts shall conform to the requirements
www.astm.org.
specified in Tables 2 and 3. The bearing surface of both bolts
Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
4th Floor, New York, NY 10036, http://www.ansi.org. and nuts shall be shaped to a 1-in. (25 mm) radius spherical
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B746/B746M − 22
A
TABLE 1 Mechanical Properties of Aluminum Structural Plate, Alloy 5052-H141
Tensile Strength, Yield Strength Elongation, %
Specified Thickness
min (0.2 % offset), min min in 2 in. or
in. mm ksi MPa ksi MPa 50 mm
0.100–0.150 2.54–3.81 35.5 245 24.0 165 6
0.175–0.250 4.44–6.35 34.0 235 24.0 165 8
A
To determine conformance with this specification, each value for tensile strength and for yield strength shall be rounded to the nearest 0.1 ksi (1 MPa) and each value
for elongation to the nearest 0.5%, both in accordance with the rounding method of Practice E29.
TABLE 2 (B746) Bolt and Nut Requirements
Bolts Nuts
General Dimensions ANSI B18.2.1 Heavy Hex ANSI B18.2.2 Heavy Hex
A
Steel Bolts and Nuts A307 A563/A563M Grade A
Zinc Coating A153/A153M or B695 Class 50 A153/A153M or B695 Class 50
Stainless Steel Bolts and Nuts F593 Alloy Group 1, 2, or 3 F594 Alloy Group 1, 2, or 3
Aluminum Bolts and Nuts F468 Alloy 6061-T6 F467 Alloy 6061-T6
3 3
Nominal Diameter, in. ⁄4 ⁄4
A
Bolts conforming to Specification A449 with suitable nuts may be substituted.
TABLE 3 (B746M) Bolt and Nut Requirements
Bolts Nuts
General Dimensions ANSI B18.2.3.6M He
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