Barrel Sections, and End Sections
513.1General Description
This work consists of constructing, transporting, joining, and finishing precast box culvert installations (normally as alternates to cast-in-place box culverts) according to plan details and these specifications. Use precast boxes only in these situations: • Under allowable fill heights designated on the plan details • As approved Design numbers for precast barrel sections refer to plan designations. Precast ends refer to precast wingwalls, parapets, apron sections, toewalls, and baffles for outlets. 513.1.01 Definitions General Provisions 101 through 150. 513.1.02 Related References
ASTM C 789 AASHTO M 259 AASHTO M 36 AASHTO M 252 513.1.03 Submittals General Provisions 101 through 150.
513.2Materials
Materials shall meet the requirements of the following Specifications: Material Section Concrete (for Precast Boxes) 843.2.01 All Other Concrete 500 Reinforcing Steel 853 767 767 767 767 767 767
Material Section Steel Bolts, Nuts, and Washers 852.2.01 Anchor Bolts 852.2.02 Bituminous Plastic Cement 848.2.05 Preformed Plastic Gaskets 848.2.06 Grout or Mortar 834.2.03 Expanded Mortar 506 Corrugated Steel Pipe (Sleeves) AASHTO M 36 Corrugated Plastic Pipe (Sleeves) AASHTO M 252 Backfill 207 513.2.01 Delivery, Storage, and Handling General Provisions 101 through 150. 513.2.02 Precast Reinforced Concrete Box Culvert Barrel and End
Refer to the Standard Specifications or plan details for the reinforcement steel requirements, concrete strength, maximum fill heights, and minimum cover. Use the design number for the specified size and fill height.
lock into the concrete and still has the reinforcement steel maintained all around the pipe sleeve insets.
anchor bolts.
without damage or excessive deformation.
The Contractor may, at no additional payment, use precast box sections with a greater span or height than specified on the Plans under the following conditions: • Minimum cover required for the design number is retained. • No detrimental effects result from using the larger size. The Contractor also may substitute a combination for multiple line culverts if the clear height and total clear spans are at least equal to that specified on the plans. Submit any alternate designs, alternate materials, or alternate methods of manufacturing to the Department for approval. Include all the necessary details and/or specifications in the submission.
Submit to the Engineer a certificate from the manufacturer of the precast boxes and precast ends stating that all of the precast box sections and all of the precast end components manufactured in this plant for the use of the Department contain at least the minimum requirements of reinforcement steel specified herein.
the company. 768 768 768 768 768 768
1) All precast box and/or all precast end components will be replaced without cost to the purchaser, if the reinforcement steel does not meet these specifications. 2) Language so that the guarantee remains in effect as long as the manufacturer continues to furnish precast box culvert barrel sections and precast end sections for use by the Department. The manufacturer’s certificate will not limit the right of the Department to make inspections and checks of the materials in manufactured precast sections prior to and during the construction of the culvert line.
Except as otherwise specified on the plans or in the specifications, manufacture precast box culvert barrel sections according to AASHTO M 259 or ASTM C 789 and applicable parts of GDT 16.
section, and in each precast apron section.
components as in Subsection 500.3.05.AB.
made either by indenting into the concrete or with waterproof paint. 1) Name or trademark of the manufacturer 2) Date of manufacture 3) Box sections (span, rise, maximum fill height, minimum cover, and concrete design strength) 4) Ensure that the top of each precast box is clearly indented by marking into either the inner or outer surface of the concrete during manufacture. 5) Ensure that the word “TOP” is painted on the inside top surface of each box in waterproof paint. Ensure that this marking comes from the manufacturer at the plant. 6) When so indicated on the plans, number and match-mark the sections. 7) Ensure each section bears the Department Inspector’s approval stamp.
manufacturer’s plant or at the construction site. Have the manufacturer check all precast components for fit and connections before transporting the components to the project.
General Provisions 101 through 150.
513.3Construction Requirements
513.3.01 Personnel General Provisions 101 through 150. 769 769 769 769 769 769
513.3.02 Equipment General Provisions 101 through 150. 513.3.03 Preparation
Excavate, place bedding, and backfill according to Section 207 and the plan details. Place bedding as follows:
from the edge of the precast apron sections.
513.3.04 Fabrication General Provisions 101 through 150. 513.3.05 Construction Install the structures as required by the Specifications and the Plan details, or as directed by the Engineer. Provide necessary temporary drainage.
Install barrels according to the manufacturer’s recommendations.
these guidelines: • In bituminous plastic cement joints, fill the annular space with joint material and wipe smooth the inside of each joint in the barrel. • Pull box sections together with a come-a-long or mechanical puller to provide jointing satisfactory to the Engineer.
box culverts. Where multiple lines are skewed, determine the end treatment method including the positions of the connector boxes, the parapet alignment, and the lengths of wingwalls needed for proper slope intercepts. This must occur before barrel installation begins. Install multiple culvert lines adjacent to one another according to Plan details. Use grout (see Subsection 834.2.03, Mortar and Grout), a concrete mix, or other material approved by the Engineer as filler material between multiple lines.
Before allowing traffic or loads on the box culvert, provide the depth and width of compacted backfill as shown on the plans to protect the structure from damage or displacement. 770 770 770 770 770 770
Damaged or displaced structures subjected to construction loads or erosion during installation and backfill shall be repaired at the Contractors expense.
Use precast or cast-in-place ends as follows:
Precast ends are allowed in the following situations: • Where either single line or multiple line precast barrels are normal to the roadway • With skewed single lines or skewed multiple lines at locations shown on the plans or approved by the Engineer Do not use precast ends with skewed culverts if the installation would be incompatible with roadway geometrics or would cause other detrimental effects.
so that the precast wing end on the acute side falls approximately at the same point that the cast-in-place long wing end would have fallen, with additional embankment warped to fit.
aprons for anchor connections. For sleeve inset fill, use either expanded mortar (see Section 506) or non-shrinking mortar (used immediately after mixing) approved by the Engineer. Do not subject anchors to loads until the mortar sets up. Use precast or cast-in-place aprons that are multi-piece or monolithic. 1) Precast Aprons. Carefully place sections to grade upon the screeded bedding described in Subsection 513.3.03.A, Excavation, Bedding, and Backfill. Ensure that forms hold bedding for toewalls according to the Plan details and as directed by the Engineer. Make joints between apron sections water tight. 2) Cast-in-Place Aprons. Ensure that concrete is set up before installing the wingwalls. Connect wingwalls to apron anchors according to plan details.
When required and when not using precast ends, use cast-in-place ends as follows:
1) Minimally increase the standard parapet and toewall widths to accommodate the double inside walls.
2) Use Type C connector boxes between the standard precast boxes and the cast-in-place construction.
place a fraction of the barrel between the connector box and the parapet.
After precast sections are set in their final position, do the following:
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513.3.06 Quality Acceptance
General Provisions 101 through 150.
513.3.07 Contractor Warranty and Maintenance
General Provisions 101 through 150.
513.4Measurement
Unless otherwise specified, the Contract includes alternate plans for both precast and cast-in-place box culverts. Plan
quantities and payment are based upon the cast-in-place alternate.
The required linear feet (meter) of culvert will be converted for payment into cubic yards (meters) of Class A
Concrete and pounds (kilograms) of reinforcement steel. These measurements will come from the standard or
special design computation tables for cast-in-place box culverts.
Multiple line precast box culverts will be measured as a multiple barrel cast-in-place box culvert of the specified size.
Wingwalls, parapets, toewalls, and aprons may be either precast or cast-in-place. Plan quantities and payment for
these items are based upon the cast-in-place design quantities.
Foundation backfill material Type II, when required, will be measured according to Subsection 207.4, Measurement.
513.4.01 Limits
No additional payment will be made when barrel lengths, apron areas, backfilling, or other items are increased due to
using the precast alternate.
The following items will not be paid for:
• Connecting hardware
• Mortar
• Joint materials
• Filler material used between multiple precast culvert lines
513.5Payment
Payment for Precast Reinforced Concrete Box Culvert Barrel Sections and End Sections will be based on the cast-in-
place alternate and will include conversions when using the precast design. Cast-in-place concrete will be paid for
under Section 500 and reinforcing steel will be paid for under Section 511.
Payment for Foundation Backfill Type II will be made according to and Subsection 207.5, Payment.
513.5.01 Adjustments
General Provisions 101 through 150.. 772 772 772 772 772 772
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