631Slotted Drains

Slotted Drains

631.1DESCRIPTION

1 This section describes the requirements for installing slotted drains.

631.2MATERIALS

1 Provide materials in accordance with the following:

Material Subsection Admixtures 801.4 Aggregate for Concrete 803 Class B Bedding 803 Corrugated Steel Pipe and Pipe Arches 808.5 Curing Materials 802.1 Fly Ash 801.2 Galvanized Coating 815.14 Portland Cement 801.1 Reinforcing Steel 811.1 Rubber Gaskets 808.15 Structural Steel 815.1 Water 814.1

631.3EQUIPMENT

1 Ensure that equipment meets the following:

Equipment Subsection Batch Plant 513.3.1 Mixers 513.3.2 Placing Equipment 513.3.3

631.4CONSTRUCTION

631.4.1 Fabrication

1 Fabricate slotted drains from galvanized, 14 gage [2 mm] thick steel pipe. Use a close- riveted and soldered annular pipe or a continuously-welded helical pipe. Use 14 gage [2 mm] galvanized metal end caps and coupling bands.

Slotted Drains SECTION 631 2 Fabricate the grate assembly from structural steel in accordance with Section 501, Structural Steel. The department does not require shop inspection or drawings. Galvanize the grate in accordance with Subsection 501.4.1.25, Galvanizing. 631.

4.2Installation

1 Do not install slotted drains in sidewalk curb ramps or pedestrian paths. Excavate in accordance with Subsection 206.4.1, Excavation. 2 Use watertight pipe coupling bands and end plugs. Use rubber gaskets with the coupling bands to ensure water-tightness. Use a metal or concrete end plug that matches the pipe corrugations. 3 For end plugs and for concrete used as backfill around slotted drains, use class B concrete in accordance with Subsection 513.4.4, Mix Design. The engineer may approve a local commercial mix. The department does not require a cement sample or aggregate gradation tests. 4 Use class B bedding material or concrete for the pipe bed. Use concrete for the top portion of the trench immediately above the bedding, as specified. When constructing a concrete pipe bed, prevent floating of the pipe. 5 When placing curb or paving material over slotted drains, cover the opening to keep out foreign material. Do not extend the slot above the paving material or gutter section. 631.

4.3Repair of Damaged Coating

1 Repair damage to spelter coatings in accordance with Subsection 501.4.2.9, Repair of Galvanizing. Do not backfill the pipe before inspection and approval of repairs by the engineer.

631.5MEASUREMENT and PAYMENT

1 The engineer will measure Slotted Drain ___ in [mm] by the foot [meter] of pipe. 2 The department will pay as follows: Pay Item Pay Unit Measure to the Nearest Pay to the Nearest Slotted Drain in [mm] FT [m] 0.1 ft [0.05 m] FT [0.5 m]

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