ASTM B864/B864M-13(2018)
(Specification)Standard Specification for Corrugated Aluminum Box Culverts
Standard Specification for Corrugated Aluminum Box Culverts
ABSTRACT
This specification covers the requirements for material, geometric, and wall section properties of aluminum box culverts manufactured from corrugated plate or sheet with attached rib stiffeners, for field assembly. Suitable fasteners and optional materials such as aluminum invert plates and headwalls are also described here. Material applications include surface water gravity flow drainage conduits like culverts and storm drains, small bridge, and grade separation structure conduits like pedestrian or vehicular underpasses, and utility tunnels. This specification does not cover the requirements for foundations, backfill, the relationship between earth cover or live loads and strength requirements, or the hydraulic design of these structures. The required plastic moment capacities should be determined for both the crown and haunch segments of the box culverts.
SCOPE
1.1 This specification covers material, geometric, and wall section properties of aluminum box culverts manufactured from corrugated plate or sheet, with attached rib stiffeners, for field assembly. Appropriate fasteners and optional materials, such as aluminum invert plates and headwalls, are also described. Applications for aluminum box culverts include conduits for gravity flow drainage of surface water, such as culverts and storm drains, as well as for small bridges and grade separation structures such as pedestrian or vehicular underpasses, and utility tunnels.
1.2 This specification does not include requirements for foundations, backfill, or the relationship between earth cover or live loads and strength requirements. These important design considerations are described in the AASHTO LRFD Bridge Design Specifications and the LRFD Bridge Construction Specifications.
1.3 This specification does not include requirements for the hydraulic design of these structures. Hydraulic design, placement of footings or inverts, and end treatments to resist scour are described in FHWA HDS No. 5.
1.4 Appendix X1 lists nominal dimensions of box culvert sizes commonly available. Also listed are cross-sectional area and hydraulic design parameters for these sizes.
1.5 Appendix X2 lists manufacturer's suggested design properties for the rib stiffener types, spacing classes, and material thicknesses described in this specification.
1.6 The values stated in either SI units or inch-pound units are to be regarded separately as standard. 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 standard.
1.7 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: B864/B864M −13 (Reapproved 2018)
Standard Specification for
Corrugated Aluminum Box Culverts
This standard is issued under the fixed designation B864/B864M; 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.
1. Scope* ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
1.1 This specification covers material, geometric, and wall
mendations issued by the World Trade Organization Technical
section properties of aluminum box culverts manufactured
Barriers to Trade (TBT) Committee.
from corrugated plate or sheet, with attached rib stiffeners, for
field assembly. Appropriate fasteners and optional materials,
2. Referenced Documents
such as aluminum invert plates and headwalls, are also
2.1 ASTM Standards:
described. Applications for aluminum box culverts include
A36/A36M Specification for Carbon Structural Steel
conduits for gravity flow drainage of surface water, such as
A123/A123M Specification for Zinc (Hot-Dip Galvanized)
culverts and storm drains, as well as for small bridges and
Coatings on Iron and Steel Products
grade separation structures such as pedestrian or vehicular
A153/A153M Specification for Zinc Coating (Hot-Dip) on
underpasses, and utility tunnels.
Iron and Steel Hardware
1.2 This specification does not include requirements for
A307 Specification for Carbon Steel Bolts, Studs, and
foundations,backfill,ortherelationshipbetweenearthcoveror
Threaded Rod 60 000 PSI Tensile Strength
live loads and strength requirements. These important design
A563 Specification for Carbon and Alloy Steel Nuts
considerations are described in the AASHTO
A563M Specification for Carbon andAlloy Steel Nuts (Met-
LRFD Bridge Design Specifications and the LRFD Bridge
ric)
Construction Specifications.
B221 Specification forAluminum andAluminum-Alloy Ex-
1.3 This specification does not include requirements for the
truded Bars, Rods, Wire, Profiles, and Tubes
hydraulic design of these structures. Hydraulic design, place-
B746/B746M Specification for CorrugatedAluminumAlloy
ment of footings or inverts, and end treatments to resist scour
Structural Plate for Field-Bolted Pipe, Pipe-Arches, and
are described in FHWA HDS No. 5.
Arches
B790/B790M Practice for Structural Design of Corrugated
1.4 Appendix X1 lists nominal dimensions of box culvert
Aluminum Pipe, Pipe-Arches, and Arches for Culverts,
sizes commonly available. Also listed are cross-sectional area
Storm Sewers, and Other Buried Conduits
and hydraulic design parameters for these sizes.
2.2 AASHTO Standard:
1.5 Appendix X2 lists manufacturer’s suggested design
LRFD Bridge Design Specifications
properties for the rib stiffener types, spacing classes, and
LRFD Bridge Construction Specifications
material thicknesses described in this specification.
2.3 FHWA Standard:
1.6 The values stated in either SI units or inch-pound units
HDS No. 5, Hydraulic Design of Highway Culverts, Third
are to be regarded separately as standard. The values stated in
Edition. FHWA publication number HIF–12–02 (2012).
each system may not be exact equivalents; therefore, each
system shall be used independently of the other. Combining
3. Terminology
values from the two systems may result in non-conformance
3.1 Definitions of Terms Specific to This Standard:
with the standard.
1.7 This international standard was developed in accor-
dance with internationally recognized principles on standard-
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
This specification is under the jurisdiction of ASTM Committee B07 on Light the ASTM website.
Metals and Alloys and is under the direct responsibility of B07.08 on Corrugated Available from American Association of State Highway and Transportation
Aluminum Pipe and Corrugated Aluminum Structural Plate. Officials (AASHTO), 444 N. Capitol St., NW, Suite 249, Washington, DC 20001,
Current edition approved Nov. 1, 2018. Published November 2018. Originally http://www.transportation.org.
approved in 1995. Last previous edition approved in 2013 as B864/B864M – 13. Available from National Technical Information Service (NTIS), 5285 Port
DOI: 10.1520/B0864_B0864M-18. Royal Rd., Springfield, VA 22161, http://www.ntis.gov.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
B864/B864M − 13 (2018)
3.1.1 box culvert—a generally rectangular conduit having a Fig.2orFig.3.Ribstiffenerspacingclassesshallbeasdefined
cross section symmetric about a vertical axis, with a long in 4.2.2 – 4.2.5 and illustrated in Fig. 4 or Fig. 5.
radius crown segment, short radius haunch segments, and
4.2.2 Class A Spacing, consisting of either Type 1, Type 2,
straight side segments, with rib stiffeners (see Fig. 1).
or Type 10 external rib stiffeners spaced at 54 in. [1372 mm]
center-to-center.
3.1.2 crown—the long radius top arc segment of a box
4.2.3 Class B Spacing, consisting of either Type 1, Type 2,
culvert cross section (see Fig. 1).
or Type 10 external rib stiffeners spaced at 27 in. [686 mm]
3.1.3 haunch—the short radius segments at the upper cor-
center-to-center.
ners of a box culvert cross section, making the transition
4.2.4 Class C Spacing, consisting of either Type 1, Type 2,
between the long radius crown segment and the straight side
or Type 10 external rib stiffeners spaced at 18 in. [457 mm]
segments (see Fig. 1).
center-to-center.
3.1.4 rib stiffeners—spaced extruded aluminum structural
4.2.5 Class D Spacing, consisting of either Type 1 or Type
members, curved to the shape of the transverse cross section of
2 external rib stiffeners spaced at 9 in. [229 mm] center-to-
box culverts and attached by field-bolting to the corrugated
center.
plate shell (see Fig. 1).
3.1.5 rise—the clear inside vertical dimension from the
5. Ordering Information
bottom of the straight side segments of a box culvert to the
5.1 Orders for products specified herein shall include the
crown, measured at the axis of symmetry (see Fig. 1).
following information required as necessary to adequately
3.1.6 shell—the continuous, structural enclosure of the box
describe the desired product characteristics:
culvert consisting of modular, field-assembled, and bolted
5.1.1 Name of product (corrugated aluminum box culvert),
corrugated aluminum plate members forming the crown,
5.1.2 ASTM designation and year of issue, as B XXX-____
haunch, and side segments (see Fig. 1).
for inch-pound units or B XXXM-____ for SI units,
3.1.7 span—the clear inside horizontal dimension of a box
5.1.3 Number of structures,
culvert, measured at the bottom of the straight side segments
5.1.4 Nominal dimensions of each structure including the
(see Fig. 1).
rise, span, length (measured along the bottom centerline), and
4. Classification cross sectional area required,
4.1 Aluminum box culverts consist ofa9by2 ⁄2 in. [229 by
NOTE 1—The nominal length increment is 2.25 ft [0.68 m]. Special
64 mm] corrugated aluminum plate shell in combination with
lengths can be provided.
extruded aluminum stiffening ribs. The plate thickness, stiff-
5.1.5 Minimum and maximum cover height over structure
enertype,andspacingclassatthecrownandhaunchofthebox
topcenterline(measuredfromtheinsidecrestofthecorrugated
culvert may differ, provided they satisfy the ordering informa-
plate to the finished surface of the traveled way),
tion and the design properties (see 5.1 and 6.1). The plate
thickness and stiffener type and spacing class may be varied NOTE2—Theminimumandmaximumcoverheightisassumedtoapply
to the entire length of the structure unless the purchaser specifies
along the length of the box culvert in accordance with cover
otherwise. The design specifications limit cover height to a range of
and loading requirements, as agreed upon between the pur-
between 1.4 and 5.0 ft [0.43 and 1.52 m]. Small deviations in the height
chaser and the fabricator.
ofcovercanmakeasignificantdifferenceinthedesign.Itisrecommended
that the purchaser specify minimum and maximum cover heights to the
4.2 Rib Stiffener Type and Spacing Class:
nearest 0.1 ft [30 mm].
4.2.1 Rib stiffeners shall consist of Type 1, Type 2, or Type
10 at the option of the fabricator. Geometry, section, and 5.1.6 Dead load unit weight, if different than 120 lb/ft
mechanical properties must conform to the requirements of [1920 kg/m ],
FIG. 1 Box Culvert Geometry
B864/B864M − 13 (2018)
Type1Rib Type2Rib
Alloy 6061-T6 6061-T6
Yield Strength 35 ksi [240 MPa] 35 ksi [240 MPa]
Tensile Strength 38 ksi [260 MPa] 38 ksi [260 MPa]
2 2 2 2
Area 1.71 in. [1103 mm]2.27in. [1465 mm ]
Center of Area Yc = 1.02 in. [26.0 mm] Yc = 1.76 in. [44.8 mm]
3 3 3 3
Plastic Modulus 1.70 in. [27 858 mm 2.68 in. [43 917 mm ]
Plastic Moment Mp = 4.97 k-ft [6.72 kN-m] Mp = 7.81 k-ft [10.60 kN-m]
FIG. 2 Geometry and Nominal Design Properties for Types 1 and 2 Ribs
Type 10 Rib
Alloy 6061-T6
Yield Strength 35 ksi [240 MPa]
Tensile Strength 38 ksi [260 MPa]
2 2
Area 7.166 in. [4623 mm ]
Center of Area Yc = 2.228 in. [56.6 mm]
3 3
Plastic Modulus 11.074 in. = [181 465 mm ]
Plastic Moment Mp = 32.23 k-ft [43.7 kN-m]
FIG. 3 Geometry and Nominal Design Properties for Type 10 Ribs
B864/B864M − 13 (2018)
5.1.7 Structure live load vehicle configuration, if different
than AASHTO HL-93 (see AASHTO LRFD Bridge Design
Specification),
5.1.8 Corrugated footing pads or full invert plates, if re-
quired. For box culverts not supported on concrete footings,
allowable foundation bearing capacity, if different than 2
tons/ft [192 kPa],
NOTE 3—Design procedures for corrugated footing pads or full invert
plates are beyond the scope of this specification. However, general
considerations for design of structural plate arch footings are given in
Practice B790/B790M. Also, specific design criteria for similar applica-
tions are available in AASHTO LRFD Bridge Design Specifications.
5.1.9 End treatment (bevel, skew, grade or slope
corrections, corrugated aluminum headwalls, cut-off walls, or
other special provision), if required,
NOTE 4—End conditions involving beveled or skewed cut ends may
require a structural support wall or collar. The design procedures for these
end treatments as well as for vertical headwalls are beyond the scope of
this specification.
5.1.10 Other special requirements such as stubs, tap-ins,
saddles, elbows, etc., if required, and
5.1.11 Material certification, if required (see 13.1).
NOTE 5—Typical ordering information may be described as: (1) One
corrugated aluminum box culvert, in accordance with ASTM B XXX-_
___, 7 ft, 3 in. rise by 20 ft, 6 in. span by 45 ft long, having a 1.4 ft
minimum cover and a 3.0 ft maximum cover, with full invert plates; or (2)
Two corrugated aluminum box culverts, in accordance with ASTM
B XXXM-____, each being 1.96 m rise by 4.67 m span by 18.3 m long,
eachhaving0.43mminimumandmaximumcovers,assumingadeadload
FIG. 4 Rib Stiffener Spacing Classes for Type 1 and Type 2 Ribs
unit weight of 2162 kg/m , having full invert plates and having ends slope
adjusted for 2 % grade, including certification.
6. Design Properties
6.1 The required plastic moment capacities shall be deter-
mined for the crown and haunch segments of the box culvert in
accordancewiththeorderinginformationandAASHTOLRFD
Bridge Design Specifications. The AASHTO LRFD Bridge
Design Specifications are applicable for the range of geometric
limitsgiveninFig.1andTables1and2.Whenagreeduponby
thepurchaserandthefabricator,boxculvertgeometriesoutside
the limits given in Tables 1 and 2 may be designed using other
recognized Design Specifications.
7. Materials
7.1 The corrugated plate material utilized for the shell shall
be fabricated from aluminum sheet or plate conforming to the
TABLE 1 Geometric Limits of Box Culverts 8 ft 9 in. to 25 ft 5 in.
[2.67 to 7.75 m]
A
Elements Minimum Maximum
Span (S) 8.75 ft [2.67 m] 25.42 ft [7.75 m]
Rise (R) 2.50 ft [0.76 m] 10.50 ft [3.20 m]
Radius of crown (r ) . . . 24.79 ft [7.56 m]
c
Radius of haunch (r ) 2.50 ft [0.76 m] . . .
h
Haunch angle (∆) 50° 70°
FIG. 5 Rib Stiffener Spacing Classes for Type 10 Ribs Length of leg (D) 0.50 ft [0.15 m] 5.2 ft [1.59 m]
B
Length of rib on leg (t) .
A
See Fig. 1 for illustration of geometric elements.
B
Minimum 19 in. [483 mm] or length of leg (D) minus 3 in. [76 mm], whichever is
less, or within 3 in. (76 mm) top of footing.
B864/B864M − 13 (2018)
TABLE 2 Geometric Limits of Box Culverts with Spans from 25 ft
8.3 Extruded aluminum rib stiffeners shall consist of annu-
6 in. to 36 ft 0 in. [7.75 to 10.97 m]
lar rings conforming to the shape and dimensions of the
A
Elements Minimum Maximum
structuralplateshell.Theboltholesshallbepunchedsothatall
Span (S) 25.50 ft [7.75 m] 36.0 ft [10.97 m]
members having like dimensions and curvature are inter-
Rise (R) 5.58 ft [1.70 m] 14.00 ft [4.27 m]
changeable. Sufficient bolt holes shall be provided in the
Radius of crown (r ) . . . 26.33 ft [8.03 m]
c
Radius of haunch (r ) 3.64ft[1.11 m] .
h
corrugated shell to match the arrangement, number, and
Haunch angle (∆) 48° 68°
spacing of bolt holes in the stiffeners. The layout of the
Length of leg (D) 0.40 ft [0.125 m] 5.92 ft [1.80 m]
B
Length of rib on leg (t) . stiffeners relative to the corrugated shell shall be in accordance
A
with 4.2 for the stiffener type and spacing class required by the
See Fig. 1 for illustration of geometric elements.
B
Minimum 28 in. [483mm] or length of leg (D) minus 3 in. [76 mm], whichever is
design.
less, or within 3 in. [76 mm] top of footing.
8.4 Rib stiffeners that are designed to be continuous around
the periphery of the crown and haunch, but that are not
fabricated in one piece, shall be provided with splice connec-
chemical, mechanical, thickness and shape requirements of
tions at the intermediate ends. The design of the splice shall be
Specification B746/B746M. Section properties for the corru-
adequate to develop the bending and axial loads carried by the
gated plate are provided in Practice B790/B790M.
rib stiffener at the location of the splice.
7.2 Rib stiffeners shall be extruded shapes conforming to
8.5 Rib stiffeners shall be provided with adequate bolted
the chemica
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: B864/B864M − 13 B864/B864M − 13 (Reapproved 2018)
Standard Specification for
Corrugated Aluminum Box Culverts
This standard is issued under the fixed designation B864/B864M; 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.
1. Scope*
1.1 This specification covers material, geometric, and wall section properties of aluminum box culverts manufactured from
corrugated plate or sheet, with attached rib stiffeners, for field assembly. Appropriate fasteners and optional materials, such as
aluminum invert plates and headwalls, are also described. Applications for aluminum box culverts include conduits for gravity flow
drainage of surface water, such as culverts and storm drains, as well as for small bridges and grade separation structures such as
pedestrian or vehicular underpasses, and utility tunnels.
1.2 This specification does not include requirements for foundations, backfill, or the relationship between earth cover or live
loads and strength requirements. These important design considerations are described in the AASHTO LRFD Bridge De-
sign Specifications and the LRFD Bridge Construction Specifications.
1.3 This specification does not include requirements for the hydraulic design of these structures. Hydraulic design, placement
of footings or inverts, and end treatments to resist scour are described in FHWA HDS No. 5.
1.4 Appendix X1 lists nominal dimensions of box culvert sizes commonly available. Also listed are cross-sectional area and
hydraulic design parameters for these sizes.
1.5 Appendix X2 lists manufacturer’s suggested design properties for the rib stiffener types, spacing classes, and material
thicknesses described in this specification.
1.6 The values stated in either SI units or inch-pound units are to be regarded separately as standard. 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 standard.
1.7 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.
2. Referenced Documents
2.1 ASTM Standards:
A36/A36M Specification for Carbon Structural Steel
A123/A123M Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products
A153/A153M Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware
A307 Specification for Carbon Steel Bolts, Studs, and Threaded Rod 60 000 PSI Tensile Strength
A563 Specification for Carbon and Alloy Steel Nuts
A563M Specification for Carbon and Alloy Steel Nuts (Metric)
B221 Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes
B746/B746M Specification for Corrugated Aluminum Alloy Structural Plate for Field-Bolted Pipe, Pipe-Arches, and Arches
B790/B790M Practice for Structural Design of Corrugated Aluminum Pipe, Pipe-Arches, and Arches for Culverts, Storm
Sewers, and Other Buried Conduits
This specification is under the jurisdiction of ASTM Committee B07 on Light Metals and Alloys and is under the direct responsibility of B07.08 on Corrugated Aluminum
Pipe and Corrugated Aluminum Structural Plate.
Current edition approved May 1, 2013Nov. 1, 2018. Published June 2013November 2018. Originally approved in 1995. Last previous edition approved in 20082013 as
B864/B864MB864/B864M – 13.-08. DOI: 10.1520/B0864_B0864M-13.10.1520/B0864_B0864M-18.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
B864/B864M − 13 (2018)
2.2 AASHTO Standard:
LRFD Bridge Design Specifications
LRFD Bridge Construction Specifications
2.3 FHWA Standard:
HDS No. 5, Hydraulic Design of Highway Culverts, Third Edition. FHWA publication number HIF–12–02 (2012).
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 box culvert—a generally rectangular conduit having a cross section symmetric about a vertical axis, with a long radius
crown segment, short radius haunch segments, and straight side segments, with rib stiffeners (see Fig. 1).
3.1.2 crown—the long radius top arc segment of a box culvert cross section (see Fig. 1).
3.1.3 haunch—the short radius segments at the upper corners of a box culvert cross section, making the transition between the
long radius crown segment and the straight side segments (see Fig. 1).
3.1.4 rib stiffeners—spaced extruded aluminum structural members, curved to the shape of the transverse cross section of box
culverts and attached by field-bolting to the corrugated plate shell (see Fig. 1).
3.1.5 rise—the clear inside vertical dimension from the bottom of the straight side segments of a box culvert to the crown,
measured at the axis of symmetry (see Fig. 1).
3.1.6 shell—the continuous, structural enclosure of the box culvert consisting of modular, field-assembled, and bolted
corrugated aluminum plate members forming the crown, haunch, and side segments (see Fig. 1).
3.1.7 span—the clear inside horizontal dimension of a box culvert, measured at the bottom of the straight side segments (see
Fig. 1).
4. Classification
4.1 Aluminum box culverts consist of a 9 by 2 ⁄2 in. [229 by 64 mm] corrugated aluminum plate shell in combination with
extruded aluminum stiffening ribs. The plate thickness, stiffener type, and spacing class at the crown and haunch of the box culvert
may differ, provided they satisfy the ordering information and the design properties (see 5.15.1 and 6.1 and 6.1). The plate
thickness and stiffener type and spacing class may be varied along the length of the box culvert in accordance with cover and
loading requirements, as agreed upon between the purchaser and the fabricator.
4.2 Rib Stiffener Type and Spacing Class:
4.2.1 Rib stiffeners shall consist of Type 1, Type 2, or Type 10 at the option of the fabricator. Geometry, section, and mechanical
properties must conform to the requirements of Fig. 2 or Fig. 3. Rib stiffener spacing classes shall be as defined in 4.2.2 – 4.2.5
and illustrated in Fig. 4 or Fig. 5.
4.2.2 Class A Spacing, consisting of either Type 1, Type 2, or Type 10 external rib stiffeners spaced at 54 in. [1372 mm]
center-to-center.
4.2.3 Class B Spacing, consisting of either Type 1, Type 2, or Type 10 external rib stiffeners spaced at 27 in. [686 mm]
center-to-center.
FIG. 1 Box Culvert Geometry
Available from American Association of State Highway and Transportation Officials (AASHTO), 444 N. Capitol St., NW, Suite 249, Washington, DC 20001,
http://www.transportation.org.
Available from National Technical Information Service (NTIS), 5285 Port Royal Rd., Springfield, VA 22161, http://www.ntis.gov.
B864/B864M − 13 (2018)
Type 1 Type 2
Type 1 Rib Type 2 Rib
Alloy 6061-T6 6061-T6
Yield Strength 35 ksi [240 MPa] 35 ksi [240 MPa]
Tensile Strength 38 ksi [260 MPa] 38 ksi [260 MPa]
2 2 2 2
Area 1.71 in. [1103 mm ] 2.27 in. [1465 mm ]
Center of Area Yc = 1.02 in. [26.0 mm] Yc = 1.76 in. [44.8 mm]
3 3 3 3
Plastic Modulus 1.70 in. [27 858 mm ] 2.68 in. [43 917 mm ]
3 3 3 3
Plastic Modulus 1.70 in. [27 858 mm 2.68 in. [43 917 mm ]
Plastic Moment Mp = 4.97 k-ft [6.72 kN-m] Mp = 7.81 k-ft [10.60 kN-m]
FIG. 2 Geometry and Nominal Design Properties for Types 1 and 2 Ribs
4.2.4 Class C Spacing, consisting of either Type 1, Type 2, or Type 10 external rib stiffeners spaced at 18 in. [457 mm]
center-to-center.
4.2.5 Class D Spacing, consisting of either Type 1 or Type 2 external rib stiffeners spaced at 9 in. [229 mm] center-to-center.
5. Ordering Information
5.1 Orders for products specified herein shall include the following information required as necessary to adequately describe
the desired product characteristics:
5.1.1 Name of product (corrugated aluminum box culvert),
5.1.2 ASTM designation and year of issue, as B XXX-____ for inch-pound units or B XXXM-____ for SI units,
5.1.3 Number of structures,
5.1.4 Nominal dimensions of each structure including the rise, span, length (measured along the bottom centerline), and cross
sectional area required,
NOTE 1—The nominal length increment is 2.25 ft [0.68 m]. Special lengths can be provided.
5.1.5 Minimum and maximum cover height over structure top centerline (measured from the inside crest of the corrugated plate
to the finished surface of the traveled way),
NOTE 2—The minimum and maximum cover height is assumed to apply to the entire length of the structure unless the purchaser specifies otherwise.
The design specifications limit cover height to a range of between 1.4 ft and 5.0 ft [0.43 m and 1.52 m]. Small deviations in the height of cover can make
a significant difference in the design. It is recommended that the purchaser specify minimum and maximum cover heights to the nearest 0.1 ft [30 mm].
3 3
5.1.6 Dead load unit weight, if different than 120 lb/ft [1920 kg/m ],
5.1.7 Structure live load vehicle configuration, if different than AASHTO HL-93 (see AASHTO LRFD Bridge Design
Specification),
5.1.8 Corrugated footing pads or full invert plates, if required. For box culverts not supported on concrete footings, allowable
foundation bearing capacity, if different than 2 tons/ft [192 kPa],
NOTE 3—Design procedures for corrugated footing pads or full invert plates are beyond the scope of this specification. However, general considerations
for design of structural plate arch footings are given in Practice B790/B790M. Also, specific design criteria for similar applications are available in
AASHTO LRFD Bridge Design Specifications.
5.1.9 End treatment (bevel, skew, grade or slope corrections, corrugated aluminum headwalls, cut-off walls, or other special
provision), if required,
NOTE 4—End conditions involving beveled or skewed cut ends may require a structural support wall or collar. The design procedures for these end
B864/B864M − 13 (2018)
Type 10 Rib
Type 10 Rib
Alloy 6061-T6
Yield Strength 35 ksi [240 MPa]
Tensile Strength 38 ksi [260 MPa]
2 2
Area 7.166 in. [4623 mm ]
Center of Area Yc = 2.228 in. [56.6 mm]
3 3
Plastic Modulus 11.074 in. = [181 465 mm ]
Plastic Moment Mp = 32.23 k-ft [43.7 kN-m]
FIG. 3 Geometry and Nominal Design Properties for Type 10 Ribs
treatments as well as for vertical headwalls are beyond the scope of this specification.
5.1.10 Other special requirements such as stubs, tap-ins, saddles, elbows, etc., if required, and
5.1.11 Material certification, if required (see 13.1).
NOTE 5—Typical ordering information may be described as: (1) One corrugated aluminum box culvert, in accordance with ASTM B XXX-____, 7 ft,
3 in. rise by 20 ft, 6 in. span by 45 ft long, having a 1.4 ft minimum cover and a 3.0 ft maximum cover, with full invert plates; or (2) Two corrugated
aluminum box culverts, in accordance with ASTM B XXXM-____, each being 1.96 m rise by 4.67 m span by 18.3 m long, each having 0.43 m minimum
and maximum covers, assuming a dead load unit weight of 2162 kg/m , having full invert plates and having ends slope adjusted for 2 % grade, including
certification.
6. Design Properties
6.1 The required plastic moment capacities shall be determined for the crown and haunch segments of the box culvert in
accordance with the ordering information and AASHTO LRFD Bridge Design Specifications. The AASHTO LRFD Bridge Design
Specifications are applicable for the range of geometric limits given in Fig. 1 and Table 1Tables 1 and 2 and Table 2. When agreed
upon by the purchaser and the fabricator, box culvert geometries outside the limits given in Table 1Tables 1 and 2 and Table 2may
be designed using other recognized Design Specifications.
7. Materials
7.1 The corrugated plate material utilized for the shell shall be fabricated from aluminum sheet or plate conforming to the
chemical, mechanical, thickness and shape requirements of Specification B746/B746M. Section properties for the corrugated plate
are provided in Practice B790/B790M.
7.2 Rib stiffeners shall be extruded shapes conforming to the chemical and mechanical requirements of Specification B221 for
6061-T6. Their dimensions and the required, nominal section properties developed are shown in Fig. 2 and Fig. 3.
7.3 Corrugated aluminum footing and invert members, when specified, shall conform to the same material requirements as 7.1.
Thickness shall be as required by the design (see Note 3) and shall not be less than 0.100 in. [2.5 mm].
B864/B864M − 13 (2018)
FIG. 4 Rib Stiffener Spacing Classes for Type 1 and Type 2 Ribs
FIG. 5 Rib Stiffener Spacing Classes for Type 10 Ribs
B864/B864M − 13 (2018)
TABLE 1 Geometric Limits of Box Culverts 8 ft 9 in. to 25 ft 5 in.
[2.67 to 7.75 m]
A
Elements Minimum Maximum
Span (S) 8.75 ft [2.67 m] 25.42 ft [7.75 m]
Rise (R) 2.50 ft [0.76 m] 10.50 ft [3.20 m]
Radius of crown ( r ) . 24.79 ft [7.56 m]
c
Radius of crown (r ) . . . 24.79 ft [7.56 m]
c
Radius of haunch ( r ) 2.50 ft [0.76 m] .
h
Radius of haunch (r ) 2.50 ft [0.76 m] . . .
h
Haunch angle (Δ) 50° 70°
Length of leg (D) 0.50 ft [0.15 m] 5.2 ft [1.59 m]
B
Length of rib on leg (t) .
B
Length of rib on leg (t) . . .
A
See Fig. 1 for illustration of geometric elements.
B
Minimum 19 in. [483 mm] or length of leg (D) minus 3 in. [76 mm], whichever is
less, or within 3 in. (76 mm) top of footing.footing.
TABLE 2 Geometric Limits of Box Culverts with Spans from 25 ft
6 in. to 36 ft 0 in. [7.75 to 10.97 m]
A
Elements Minimum Maximum
Span (S) 25.50 ft [7.75 m] 36.0 ft [10.97 m]
Rise (R) 5.58 ft [1.70 m] 14.00 ft [4.27 m]
Radius of crown (r ) . 26.33 ft [8.03 m]
c
Radius of crown (r ) . . . 26.33 ft [8.03 m]
c
Radius of haunch (r ) 3.64 ft [1.
...
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