- 880 - SECTION 1042 -- STRUCTURAL PLATE PIPE
1042.01 Description
1.Galvanized steel structural plat e for pipe, pipe-arches, and arches shall conform to the requirements of AASHTO M 167, with the exception that units on which the spelter coating has been damaged shall be repaired in accordance with Section 1061.
2.Aluminum alloy structural plat e for pipe, pipe-arches, and arches shall conform to the requ irements of AASHTO M 219.
1042.02 Acceptance Requirements
1.Structural pipe plate will be ac cepted based on requirements of this Section and sampling and testing requirements in accordance with the Department’s Materials Sampling Guide . - 881 - SECTION 1043 -- FLAP GATES
1043.01 Description
1.Flap gates shall be a double-hinged type furnished in accordance with the dimensions shown in the contract. The gates approved for use shall be furnished with seats and anchor dev ices or be factory mounted on the corrugated metal pipe.
1043.02 Material Characteristics
1.The gates shall consist of a fl ap and a seat with a circular opening of the size shown in the contract. The flaps and seats shall be designed to withstand the maximum hydraulic head above the centerline of the gate.
2.The gates shall be designed to open and close under a differential head of 0.2 foot (61 mm) and shall provide a watertight seat against backflow.
3.The cast iron gates shall be m anufactured in accordance with the requirements of ASTM A 126 Class B.
4.Any devices necessary to fasten the gate to the culvert pipe must be approved by the Engineer.
1043.03 Acceptance Requirements
1.Flap gates approved for use are shown in the contract.
Referenced in this section
STRUCTURAL PLATE PIPE in other states
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Source: Nebraska Standard Specifications for Highway Construction, 2017 Edition. Pages 914–914 of 1,048. View official source ↗