439 SECTION 836
836.01 General
Tag all material delivered to the project site with a metal or plastic tag showing the manufacturer’s heat number. Place the heat numbers on the tag in one of the following manners: − Embossed numbers; − Printed using waterproof ink; or − Engraved numbers.
836.02 Reinforcing Steel
A.Deformed and Plain Steel Bars for Concrete Reinforcement. Use deformed and plain bars that meet AASHTO M 31, Grade 40 or 60. If epoxy coated bars are specified, use bars that have been coated as specified in ASTM A 775.
B.Welded Deformed Steel Bar Mats for Concrete Reinforcement. For concrete rei nforcement, use fabricated steel bar or rod mats that meet AASHTO M 54, Grade 40 or 60.
836.03 Wire Reinforcement
A.Steel Welded Wire Reinforcement, Deformed, for Concrete. Use welded deformed steel wire reinforcement that meets AASHTO M 221.
B.Steel Welded Wire Reinforcement, Plain, for Concrete. Use welded steel wire reinforcement that meets AASHTO M 55.
C.Steel Wire, Deformed, for Concrete Reinforcement. Use deformed steel wire for concrete reinforcement that meets AASHTO M 225.
D.Steel Wire, Plain, for Concrete Reinforcement. For concrete reinforcement, use cold drawn steel wire that meets AASHTO M 32.
E.Steel Strand, Uncoated Seven-Wire for Concrete Reinforcement. Use pre-tensioning steel that meets AASHTO M 203.
836.04 Dowel Bars for Pavement Joints
A.General. Use dowels that meet the requirements of AASHTO M 31 or M 322. Use dowels that are epoxy coated as specified in ASTM A 775, except exposed ends resulting from saw cutting or shearing do not need to be patched. Saw cut or shear dowels to the required length and clean the dowels to remove all cutting burrs, loose mill scale, rust, grease, and oil. If dowels are sheared, variation of the bars from true round shape shall not exceed 0.04 inches in diameter or thickness and any variation shall not extend more than 0.04 inches from the sheared end.
B.Dowel Bars for Expansion Joints. Fit the free end of dowels for expansion joints with a metal sleeve of an approved design covering one to three inches of the dowel. Use a sleeve that has a closed end and a stop to hold the closed end at least one inch from the end of the dowel bar. Use a sleeve that does not collapse or distort in handling and placing of the dowels and concrete.
836.05 Tie Bars for Pavement Joints
Use t ie bars that are epoxy coated according to ASTM A 775. Select tie bars based on Table 836- 01. Table 836 -01 Joint Location Reference Centerline and Between Adjacent Driving Lanes Section 836.02 A, “ Deformed and Plain Steel Bars for Concrete Reinforcement” All Other Locations AASHTO M 31, Grade 40, deformed Section 840 441 SECTION 840 PILING
840.01 Steel Piling
A.Steel H -Piling and Special Sections. Use materials for steel piling and special sections that meet AASHTO M 270, Grade 50.
B.Shells for Steel Encased Concrete Piling. Use shells for steel encased concrete piling that are either cylindrical pipe or tapered fluted. Use cylindrical pipe shells that are electric welded steel pipe or seamless steel pipe and that meet ASTM A 252, Grade 2. Use end closure plates that are 3/4 inch flat steel plate welded directly to the pipe and that do protrude beyond the perimeter of the pile.
840.02 Timber Piling
A.Requirements. Use timber piling that is clean-peeled and meets ASTM D 25. Provide a certificate of compliance for timber piling.
B.Dimensions. Provide piles with the diameters shown in Table 840-01. Table 840-01 Length of Piles Diameter (Inches) 3 Feet from Butt At Tip Under 40 feet 12 8 40 to 74 feet 13 7 75 to 90 feet 13 6 Over 90 feet As shown elsewhere in the contract
C.Treatment. If specified, treat timber piling according to Section 846, “Preservatives and Pressure Treatment Processes for Timber” . In addition to the requirements of Section 106.01 C, “Certificate of Compliance” , include the following information on the certificate of compliance: − The species of timber; − Type of preservative; and − Method of treatment.
840.03 Sheet Piling for Permanent Installation
A.Steel Sheet Piling. Use steel sheet piling that meets AASHTO M 202.
Referenced in this section
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Source: North Dakota Standard Specifications for Road and Bridge Construction, 2022 Edition. Pages 474–475 of 550. View official source ↗