PIPE CULVERTS
B. Pipe Aprons and Beveled Ends
C. Footings for Concrete Pipe Aprons
Construct pipe culverts, beveled ends, pipe aprons, and associated appurtenances.
Comply with Division 1 - General Provisions and Covenants.
Comply with Division 1 - General Provisions and Covenants.
1.05 DELIVERY, STORAGE, AND HANDLING
Comply with Division 1 - General Provisions and Covenants.
Comply with Division 1 - General Provisions and Covenants.
None.
1. Trenched:
a. Measurement: Each type and size of pipe installed in a trench will be measured in linear feet from end of pipe to end of pipe along the centerline of pipe, exclusive of aprons. Lengths of elbows and tees will be included in length of pipe measured.
b. Payment: Payment will be made at the unit price of each type and size of pipe.
c. Includes: Unit price includes, but is not limited to, trench excavation; dewatering; furnishing and installing pipe; furnishing, placing, and compacting bedding and backfill material; connectors; testing; and inspection.
2. Trenchless:
a. Measurement: Each type and size of pipe installed by trenchless methods will be measured in linear feet along the centerline of the casing pipe.
b. Payment: Payment will be made at the unit price for each type and size of pipe.
c. Includes: Unit price includes, but is not limited to, furnishing and installing pipe; trenchless installation materials and equipment; pit excavation, dewatering, and placing and compacting backfill material; pipe connections; testing; and inspection.
1.08 MEASUREMENT AND PAYMENT (Continued)
1. Measurement: Each type and size of pipe apron will be counted.
2. Payment: Payment will be made at the unit price for each type and size of pipe apron.
3. Includes: Unit price includes, but is not limited to, trench excavation; dewatering; furnishing and installing the apron; furnishing, placing, and compacting bedding and backfill material; connectors; and other appurtenances.
C. Footings for Concrete Pipe Aprons:
1. Measurement: Each type and size of footing installed on a concrete pipe apron will be counted.
2. Payment: Payment will be made at the unit price for each type and size of footing.
3. Includes: Unit price includes, but is not limited to, excavation; dewatering; reinforcing steel; concrete; furnishing, placing and compacting bedding and backfill material.
1. Measurement: Each type and size of pipe apron guard will be counted.
2. Payment: Payment will be made at the unit price for each type and size of pipe apron guard.
3. Includes: Unit price includes, but is not limited to, furnishing and installing the apron guard and repairing any damage to the apron from the installation process.
A. Roadway Pipe Culverts: All storm sewer pipe materials specified for use in right-of-way in Section 4020 may be used within right-of-way as a roadway pipe culvert.
B. Entrance Pipe Culverts: The following pipe culvert types described in Section 4020 may be used within right-of-way as entrance pipe culverts:
1. Reinforced Concrete Pipe (RCP).
2. Reinforced Concrete Arch Pipe (RCAP).
3. Reinforced Concrete Elliptical Pipe (RCEP).
4. Reinforced Concrete Low Head Pressure Pipe (RCPP).
5. Corrugated Metal Pipe (CMP).
6. Spiral Rib Pipe.
7. Coated Corrugated Metal Pipe.
8. Corrugated Metal Arch Pipe.
C. Structural Plate Culverts: Structural plate culverts may be used in the right-of-way as roadway or entrance pipe culverts.
1. Use a galvanized steel structural plate complying with AASHTO M 167.
2. Use bolts and nuts complying with ASTM A 449 and galvanized per ASTM A 153, Class C.
3. Assemble the structure according to the manufacturer’s recommendations. Tighten the bolts using an applied torque of between 100 and 300 foot-pounds.
4. Install the structure according to the contract documents, the manufacturer˘s recommendations, and AASHTO Standard Specifications for Highway Bridges, Division II, Section 26.
5. Conform the gage of the structure to Iowa DOT Standard Road Plan DR-104 or as specified in the contract documents.
D. Aluminum Structural Plate Culverts: Aluminum structural plate culverts may be used in the right-of-way as roadway or entrance pipe culverts.
1. Comply with AASHTO M 219.
2. Use a corrugation profile of 9 inches by 2 1/2 inches.
3. Use aluminum complying with ASTM B 209.
4. Use a minimum thickness of 0.100 inch. Gage of structure complying with manufacturer’s requirements.
5. Use bolts and nuts meeting ASTM A 307 or ASTM A 449 and galvanize per ASTM A 153.
2.01 PIPE CULVERTS (Continued)
6. Assemble the structure according to the manufacturer’s recommendations. Tighten the bolts using an applied torque of between 100 and 300 foot-pounds.
7. Install the structure according to the contract documents, the manufacturer’s recommendations, and AASHTO Standard Specifications for Highway Bridges, Division II, Section 26.
8. Meet or exceed the AASHTO Standard Specifications for Highway Bridges, Division I, Section 12.8 for HS 20 loading.
Comply with the requirements of Section 4020, 2.01 and Section 4030, 2.01 for the pipe material of which the apron is constructed. Supply concrete pipe aprons according to Figure 4030.222 and Figure 4030.223. Supply CMP pipe aprons according to Figure 4030.225.
Comply with the requirements of Figure 4030.221 and Section 6010 for reinforcing steel and structural concrete used in apron footings.
Use smooth or deformed steel bars, ASTM A 615, Grade 40 or merchant quality, in the construction of the apron guard. Hot dip galvanize the apron guard according to ASTM A 123.
3.01 PIPE CULVERT INSTALLATION
1. Install pipe in a trench per Section 4020.
2. For culvert pipe installed in embankment, pipe may be installed at the Contractor’s option per the contract documents and the following Iowa DOT Specifications sections:
a. Reinforced Concrete Pipe (circular, arched, and elliptical): Section 2416.
b. Corrugated Metal and Corrugated Plastic Pipe: Section 2417.
c. Structural Plate Culverts: Section 2420.
B. Trenchless: For trenchless installations, comply with Section 3020.
A. Install pipe aprons where specified in the contract documents. Use the same installation methods as used on the pipe to which the apron is being attached. Dewater area as necessary to prevent installing the apron in water or on saturated soil or bedding. Do not allow water to rise around the apron prior to backfilling the area.
B. Install apron footings where specified. Construct per Section 6010 and the contract documents. Dewater area as necessary to prevent installing the apron footing in water or on saturated soil or bedding. Do not allow water to rise around the apron footing prior to backfilling the area.
C. Anchor the last three concrete pipe sections and the apron together with two pipe connections per joint. Comply with Iowa DOT Standard Road Plan DR-121.
D. Attach corrugated metal aprons to the culvert pipe with a manufacturer’s approved bolt, weld, or clamp to fasten directly to the culvert.
E. Install apron guard where specified. Construct according to Figure 4030.224 or 4030.225. Repair any damage to the galvanized coating that occurs due to storage, handling, or installation.
3.03 CLEANING, INSPECTION, AND TESTING
Clean, inspect, and test culverts per Section 4060.
END OF SECTION