Part 1 — General
1.1 Section Includes
A.Structural plate pipe structures .
B.Cast-in-place concrete elements including footings, cutoff walls, reinforced concrete slope collars, thrust blocks, and headwalls as shown .
1.2 Related Sections
A.Section 02056: Embankment, Borrow, and Backfill
B.Section 02075: Geotextiles
C.Section 02317: Structural Excavation
D.Section 03055: Portland Cement Concrete
E.Section 03211: Reinforcing Steel and Welded Wire
F.Section 03310: Structural Concrete
G.Section 03575: Flowable Fill
1.3 References
A.AASHTO M 167: Corrugated Steel Structural Plate, Zinc -Coated, for Field -Bolted Pipe, Pipe- Arches, and Arches
B.AASHTO M 219: Corrugated Aluminum Alloy Structural Plate for Field- Bolted Pipe, Pipe -Arches, and Arches
C.AASHTO M 243: Field -Applied Coating of Corrugated Metal Structural Plate for Pipe, Pipe- Arches, and Arches
D.AASHTO Manual for Bridge Evaluation
E.UDOT Bridge Management Manual
F.UDOT Structures Design and Detailing Manual
1.4 Definitions
A.Deflection – A deviation from a pipe’s original shape.
1.5 Submittals
A.Manufacturer’s certificate of compliance for fabricated structure materials. Refer to AASHTO M 167 and AASHTO M 219.
B.Fabrication and installation working drawings for review of fabricated materials, and cast -in-place elements that are included in this item of work and are not detailed in the contract plans.
1.Include details not provided in the contract documents for the fabrication, transportation, erection, and construction of the members included in this item of work.
2.Include bedding and backfill requirements .
3.Manufacturer’s installation instructions and incidental materials required for installation.
4.Detail construction phases , layout, joint details, position of each plate, assembly order and bolt tensioning sequence.
5.Detail cast -in-place elements included in this item of work.
6.Load rating
a.Required for structures which meet the definition of bridge or when requirement is shown.
b.Load Rating Report and supplemental documentation according to the AASHTO Manual for Bridge Evaluation, UDOT Structures Design and Detailing Manual and the UDOT Bridge Management Manual .
c.Include inventory and operating load ratings in a table on the first sheet of the drawings.
7.Provide the seal of a Professional Engineer (PE) or Professional Structural Engineer (SE) licensed in the State of Utah on the drawings and supporting engineering calculations for the following:
a.Designs of structural plate pipe structures
b.Structural members and ancillary appurtenances designed by the fabricator
c.Connections to cast -in-place members and appurtenances.
d.Load ratings
e.Other means and methods that require an engineer’s design
Part 2 — Products
2.1 Bedding
A.Granular Backfill Borrow – Refer to Section 02056 .
2.2 Geotextile S
A.Refer to Section 02075.
2.3 Flowable Fill
A.No maximum strength limitation is required for this application.
B.Refer to Section 03575.
2.4 Borrow and Backfill
A.Refer to Section 02056.
2.5 Concrete
A.Use Class AA(AE) concrete according to Section 03055.
2.6 Reinforcing Steel
A.Use coated reinforcing steel according to Section 03211 .
2.7 Steel S Tructural Plate
A.Corrugated Steel Structural Plate – Refer to AASHTO M 167.
B.Corrugated Aluminum Alloy Structural Plate – Refer to AASHTO M 219.
2.8 Nuts and Bolts
A.Refer to authorized fabrication and installation drawings.
2.9 Field Applied Asphalt Mastic
A.Refer to AASHTO M 243.
2.10 Fabrication
A.Design and load rate structural plate pipe structures and cast -in-place concrete elements in accordance with the UDOT Structures Design and Detailing Manual and UDOT Bridge Management Manual .
1.Design structures for HL -93 vehicular live loading .
Part 3 — Execution
3.1 Installation
A.Excavation and Preparation
1.Refer to Section 02317.
2.Keep trenches free from water.
3.Prepare subgrade to provide a firm and uniform bearing throughout the entire length of the structure.
a.Scarify and compact the top 8 inches of the excavated ground surface to at least 90 percent of the maximum laboratory density.
4.Place geotextile and bedding according to the authorized fabrication and installation drawings and as shown.
B.Assembly
1.Assemble structural plate pipe structures according to the authorized fabrication and installation drawings.
2.Provide loose- bolt assembly to maintain structure shape during erection unless temporary bracing is required.
a.Properly align plates to avoid permanent deflection from the design shape before bolt tightening.
3.Install temporary bracing to maintain structure shape during erection when required.
a.Remove temporary bracing when backfilling reaches the top quadrant of the structure.
4.Do not exceed the manufacturer’s assembly tolerances before backfilling .
C.Backfill 1. Backfill structure according to the authorized fabrication and installation drawings .
2.Install flowable fill when shown.
a.Do not backfill against flowable fill until it meets a strength of at least 50 psi .
3.Check and control the deflection of the structure during the entire backfilling operation.
a.Do not exceed the manufacturer’s recommended limits.
D.Cast-In-Place Concrete
1.Construct in accordance with the authorized fabrication and installation drawings.
2.Refer to Section 03310.
3.Clean b onding surfaces between elements of debris, dust, and rust before connecting elements.
4.Spray or brush- coat aluminum pipe in permanent contact with concrete with asphalt mastic to a minimum thickness of 0.05 inches.
5.Cast the Department structure number into the exposed faces of the reinforced concrete slope collar or headwall at each end of the structure as shown.
Source: Utah Standard Specifications for Road and Bridge Construction, 2026 Edition. Pages 1134–1138 of 1,331.