- 821 - SECTION 1026 -- STEEL STRAND FOR PRESTRESSED CONCRETE UNITS
1026.01 Description
1.The steel strand for prestressed concrete piling, sheet piling, and girder units shall conform to the r equirements of ASTM A 416/A 416M and those described in the contract.
2.Low relaxation strands shall be allowed in the fabrication of prestressed concrete piling and sheet piling. No mixing of stress relieved and low relaxation strands shall be allowed on any project.
1026.02 Acceptance Requirements
1.Acceptance shall be based on sampling and testing requirements in accordance with the Department’s Materials Sampling Guide . - 822 - SECTION 1027 -- DEFORMED METAL CENTER JOINT AND METAL KEYWAY
1027.01 Description
1.Deformed metal center joint and metal keyway shall be fabricated of coated iron or steel sheets and sh all meet the following requirements:
a.Metal Center Joint:
1.Metal center joint sections shall be manufactured from sheets no less than 18 gauge [0.05 inch (1.3 mm)] thick and shall be of the size and trapezoidal shape shown in the contract. The sections shall be punched along the centerline of the narrow face of t he trapezoid to admit the tie bars required by the contract and al so at intervals of not greater than 2 feet (600 mm) to receive pins that are driven vertically into the subgrade to support the metal center joint. b . M e t a l K e y w a y : (1) The trapezoidal shaped section of the metal keyway shall be manufactured from sheets no less than 24 gauge [0.0276 inch (700 m)] thick and shall be of the size shown in the contract. The metal keyway section shall be punched along the centerline of the narrow face of the trapezoid to admit the tie bars required by the contract. The metal leg for the keyway shall be manufactured from sheets no less than 18 gauge [0.05 inch (1.3 mm)] thick.
1027.02 Acceptance Requirements
1.Acceptance shall be based on visual inspection by the Engineer to assure the material meets contract requirements.
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Source: Nebraska Standard Specifications for Highway Construction, 2017 Edition. Pages 855–855 of 1,048. View official source ↗