Part 1 — General
1.1 Section Includes
A.Precast concrete foundation s for roadside traffic signs , non-overhead.
1.2 Related Sections
A.Section 02056: Embankment, Borrow, and Backfill
B.Section 03055: Portland Cement Concrete
C.Section 03211: Reinforcing Steel and Welded Wire
1.3 References
A.AASHTO M 111: Zinc (Hot -Dip Galvanized) Coatings on Iron and Steel Products
B.AASHTO M 291: Carbon and Alloy Steel Nuts
C.AASHTO M 292: Carbon and Alloy Steel Nuts for Bolts for High- Pressure or High -Temperature Service or Both
D.AASHTO M 293: Hardened Steel Washers
E.ASTM A 36: Carbon Structural Steel
F.ASTM F 1554: Anchor Bolts, Steel, 36, 55, and 105- ksi Yield Strength .
G.UDOT Quality Management Plan
1.4 DEFINITIONS Not Used
1.5 Submittals
A.Working D rawings
1.Detailed shop drawings of lifting methods and devices for review .
a.Provide the seal of a Professional Engineer (PE) or Professional Structural Engineer (SE) licensed in the State of Utah.
b.Include supporting engineering calculations.
Part 2 — Products
2.1 Concrete
A.Class AA(AE) – Refer to Section 03055.
2.2 Reinforcing Steel
A.Refer to Section 03211.
2.3 Anchor Bolts , Nuts , and Washers
A.Use bolts, nuts, and washers displaying the manufacturer’s markings.
B.Anchor Bolts – Refer to ASTM F 1554.
C.Nuts
1.Refer to AASHTO M 291 or AASHTO M 292.
2.Use heat -treated Grades DH and 2H.
D.Washers – Refer to AASHTO M 293.
E.Galvanize according to AASHTO M 111.
2.4 Anchor Bolt Templates
A.Refer to ASTM A 36.
B.Galvanize according to AASHTO M 111.
2.5 Shaft Fabrication
A.Use a Department Certified Concrete Precaster or a pre- qualified project site caster for concrete products according to the Department Quality Management Plan: Precast -Prestressed Concrete Structures .
B.Obtain a minimum compress ive strength of 500 psi before stripping the forms.
C.Permanently mark the top of the shaft with date of casting and supplier identification.
1.Stamp markings in fresh concrete.
2.6 Drilling Equipment
A.Capable of:
1.Drilling holes to the required diameter, location, alignment, and depth in the type of materials present at the shaft locations .
2.Installing and removing casing.
2.7 Free Draining Granular Backfill
A.Refer to Section 02056.
Part 3 — Execution
3.1 Drilling
A.Drilling Holes
1.Drill straight, vertical holes to the depth shown or as directed by the Engineer .
2.Drill holes within 3 inches of plan position.
3.Remove all loose material from the bottom of the drilled holes before placing the shaft .
4.Do not use water or slurry for drilling operations .
B.Casing
1.Furnish and place casing when required to prevent the drilled hole from caving and any time groundwater is encountered.
2.Remove casing during or after the b ackfill is placed.
C.Uncased Holes
1.Drill uncased , dry, non -caving holes in a continuous operation.
D.Obtain Engineer’s approval to place shaft under water.
3.2 Shaft Installation
A.Place and compact free draining granular backfill in the bottom of the drilled hole to the proper elevation before placing the shaft .
B.Place free draining granular backfill up to the top of the shaft .
1.Compact by hand using a maximum of 12 -inch lifts.
Source: Utah Standard Specifications for Road and Bridge Construction, 2026 Edition. Pages 825–827 of 1,331.